Biggest changeWe believe our cash and cash equivalents on hand at December 31, 2022, and management's operating plan, will provide sufficient liquidity to fund our operations for at least the next twelve months from the issuance of the consolidated financial statements included in this Annual Report on Form 10-K. 54 Table of Contents Historical Cash Flows Year Ended December 31, 2022 2021 (In thousands) Net cash provided by (used in): Operating activities $ (380,241) $ (230,763) Investing activities (286,165) (387,519) Financing activities 459,003 489,357 Net decrease in cash, cash equivalents and restricted cash $ (207,403) $ (128,925) Operating Activities Net cash used in operating activities was $380.2 million for the year ended December 31, 2022, and consisted primarily of $500.2 million of net losses, adjusted for non-cash items, which primarily included stock-based compensation expense of $45.7 million, depreciation and amortization expense of $11.1 million, amortization of debt issuance costs of $2.0 million, other non-cash items of $10.8 million, as well as a $50.3 million of cash provided from changes in working capital.
Biggest changeHistorical Cash Flows Year Ended December 31, 2023 2022 (In thousands) Net cash provided by (used in): Operating activities $ (448,193) $ (380,241) Investing activities (116,273) (286,165) Financing activities 475,431 459,003 Net decrease in cash, cash equivalents and restricted cash $ (89,035) $ (207,403) Operating Activities Net cash used in operating activities was $448.2 million for the year ended December 31, 2023, and consisted primarily of $502.3 million of net losses, adjusted for non-cash items, which primarily included stock-based compensation expense of $44.3 million and depreciation and amortization expense of $13.4 million. 53 Table of Contents Net cash used in operating activities was $380.2 million for the year ended December 31, 2022, and consisted primarily of $500.2 million of net losses, adjusted for non-cash items, which primarily included stock-based compensation expense of $45.7 million, depreciation and amortization expense of $11.1 million, as well as $50.3 million of cash provided from changes in operating assets and liabilities.
Although we believe that our current capital is adequate to sustain our operations for at least the next twelve months, changing circumstances may cause us to consume capital significantly faster than we currently anticipate, and we may need to spend more money than currently expected because of circumstances beyond our control.
We believe that our current capital is adequate to sustain our operations for at least the next twelve months. Changing circumstances may cause us to consume capital significantly faster than we currently anticipate, and we may need to spend more money than currently expected because of circumstances beyond our control.
Investing Activities Net cash used in investing activities was $286.2 million for the year ended December 31, 2022, and consisted primarily of $704.6 million in purchases of marketable securities and $16.5 million in purchases of capital expenditures, partially offset by $434.9 million in proceeds from maturities and calls of marketable securities.
Net cash used in investing activities was $286.2 million for the year ended December 31, 2022, and consisted of $704.6 million in purchases of marketable securities and $16.5 million in capital expenditures, partially offset by $434.9 million in proceeds from maturities and calls of marketable securities.
Revenue recorded for the year ended December 31, 2022 was primarily attributable to membership fees related to our Future Astronaut community, fees related to our Future Astronaut community event, and scientific research services under government contracts.
Revenue for the year ended December 31, 2022 was primarily attributable to membership fees related to our Future Astronaut community, fees related to our Future Astronaut community event, and scientific research services under government contracts.
A discussion and analysis of, and a comparison between, our results of operations for the years ended December 31, 2021 and 2020 can be found in Item 7, “Management’s Discussion and Analysis of Financial Condition and Results of Operations,” in our Annual Report on Form 10-K for the fiscal year ended December 31, 2021.
A discussion and analysis of, and a comparison between, our results of operations for the years ended December 31, 2022 and 2021 can be found in Item 7, “Management’s Discussion and Analysis of Financial Condition and Results of Operations,” in our Annual Report on Form 10-K for the fiscal year ended December 31, 2022.
Short-term Liquidity and Capital Resources For at least the next twelve months, we expect our principal demand for funds will be for our ongoing activities described above. We expect to meet our short-term liquidity requirements primarily through our cash, cash equivalents and marketable securities on hand.
Liquidity Outlook For at least the next twelve months, we expect our principal demand for funds will be for our ongoing activities described above. We expect to meet our short-term liquidity requirements primarily through our cash, cash equivalents and marketable securities on hand.
The following is a discussion and analysis of, and a comparison between, our results of operations for the years ended December 31, 2022 and 2021.
The following is a discussion and analysis of, and a comparison between, our results of operations for the years ended December 31, 2023 and 2022.
“ Risk Factors—Risks Related to Our Business .” Critical Accounting Policies and Estimates Our discussion and analysis of our financial condition and results of operations are based upon our consolidated financial statements, which have been prepared in accordance with GAAP.
“ Risk Factors—Risks Related to Our Business .” Critical Accounting Policies and Estimates Our discussion and analysis of our financial condition and results of operations are based upon our consolidated financial statements, which have been prepared in accordance with U.S. generally accepted accounting principles.
Going forward, we expect the size of our backlog and the number of future astronauts that have flown to space on our spaceflight system to be an important indicator of our future performance. As of December 31, 2022, we had reservations for space flights for approximately 800 future astronauts.
Going forward, we expect the size of our backlog and the number of astronauts that have flown to space on our spaceflight system to be an important indicator of our future performance. As of December 31, 2023, we have reservations for spaceflights for approximately 750 future astronauts.
Financing Activities Net cash provided by financing activities was $459.0 million for the year ended December 31, 2022, and consisted primarily of the issuance of the 2027 Notes for net proceeds of $413.7 million and proceeds from the sale and issuance of common stock of $103.3 million, partially offset by the purchase of the 2027 Capped Calls of $52.3 million, tax withholdings paid for net settled stock-based awards of $4.0 million and transaction costs incurred for the issuance of common stock of $1.2 million.
Net cash provided by financing activities was $459.0 million for the year ended December 31, 2022, and consisted primarily of the issuance of the 2027 Notes for net proceeds of $413.7 million and net cash proceeds from the sale and issuance of common stock of $102.1 million, partially offset by the purchase of the capped call related to the 2027 Notes of $52.3 million and tax withholdings paid for net settled stock-based awards of $4.0 million.
The income tax expense includes the effects of any accruals that we believe are appropriate, as well as the related net interest and penalties. We have not yet started commercial operations, and as such, we are accumulating net operating losses at the federal and state levels.
The income tax expense includes the effects of any accruals that we believe are appropriate, as well as the related net interest and penalties. We are accumulating net operating losses at the federal and state levels.
We believe that the estimates, assumptions and judgments involved in the accounting policies described below have the greatest potential impact on our consolidated financial statements and, therefore, we consider these to be our critical accounting policies. Accordingly, we evaluate our estimates and assumptions on an ongoing basis. Our actual results may differ from these estimates under different assumptions and conditions.
We believe that the estimates, assumptions and judgments involved in the accounting policies referred to below have the greatest potential impact on our consolidated financial statements and, therefore, we consider these to be our critical accounting policies. Accordingly, we evaluate our estimates and assumptions on an ongoing basis.
Please refer to Note 2 in our consolidated financial statements included in Item 8 of this Annual Report on Form 10-K for information about these critical accounting policies, as well as a description of our other significant accounting policies.
Our actual results may differ from these estimates under different assumptions and conditions. Please refer to Note 2 in our consolidated financial statements included in Item 8 of this Annual Report on Form 10-K for information about these critical accounting policies, as well as a description of our other significant accounting policies.
In August 2021, following Sir Richard Branson's successful test flight, we reopened ticket sales to a select group and increased the pricing of our consumer offerings to a base price of $450,000 per seat. In February 2022, we opened ticket sales to the general public.
In August 2021, we reopened ticket sales to a select group and increased the pricing of our consumer offerings to a base price of $450,000 per seat. In February 2022, we opened ticket sales to the general public for a limited time.
We expect these resources will be adequate to fund our ongoing operating activities. The commercial launch of our human spaceflight program and the anticipated expansion of our fleet have unpredictable costs and are subject to significant risks, uncertainties and contingencies, many of which are beyond our control, that may affect the timing and magnitude of these anticipated expenditures.
The commercial launch of our spaceflight program and the anticipated expansion of our fleet have unpredictable costs and are subject to significant risks, uncertainties and contingencies, many of which are beyond our control, that may affect the timing and magnitude of these anticipated expenditures.
Customer experience costs for the year ended December 31, 2022 were primarily attributable 52 Table of Contents to costs related to our Future Astronaut community event, other costs to maintain our Future Astronaut community, labor costs provided for scientific research services, and incremental costs related to payload services.
Spaceline operations expense for the year ended December 31, 2022 was primarily attributable to costs related to our Future Astronaut community event, other costs to maintain our Future Astronaut community, labor costs provided for scientific research services, and incremental costs related to payload services.
LLC (each, an “Agent” and collectively, the “Agents”) providing for the offer and sale of up to $500.0 million of shares of our common stock, par value $0.0001 per share, through an "at the market offering" program ("ATM"), from time to time by us through the Agents, acting as our sales agents, or directly to one or more of the Agents, acting as principal (the “2021 ATM program”).
LLC (each, an "Agent" and collectively, the "Agents") providing for the offer and sale of up to $300 million of shares of our common stock from time to time through the Agents, acting as sales agents, or directly to one or more of the Agents, acting as principal(s), through an "at-the-market offering" program (the "2022 ATM Program").
As of December 31, 2022, we sold a total of 16,265,700 shares of our common stock under the 2022 ATM program, generating $103.3 million in gross proceeds, before deducting $1.2 million in underwriting discounts, commissions and other expenses payable by us.
As of December 31, 2023, we sold a total of 79.7 million shares of common stock under the 2023 ATM Program, generating $287.5 million in gross proceeds, before deducting $2.9 million in underwriting discounts, commissions and other expenses.
Long-term Liquidity and Capital Resources Beyond the next twelve months, our principal demand for funds will be to sustain our operations, including the construction of additional motherships under an agreement with a third-party contractor, and spaceship vehicles, construction of our astronaut campus, expansion of the New Mexico Spaceport, and for the payment of the principal amount of our convertible senior notes as it becomes due.
Beyond the next twelve months, our principal demand for funds will be to sustain our operations, including the construction of additional spaceships and motherships, expansion of our footprint at Spaceport America in New Mexico, construction of our astronaut campus and payment of the principal amount of our convertible senior notes as they become due.
("Bell") and Qarbon Aerospace ("Qarbon") to manufacture key subassemblies for our next generation spaceships, will require significant capital expenditures from us, but such amounts are subject to future negotiations and cannot be estimated with reasonable certainty.
We expect our arrangements with third-party providers to manufacture key subassemblies for our next generation spaceships and for the design and manufacture of our next generation carrier aircraft will require significant capital expenditures. Certain estimated amounts in connection with third-party arrangements are subject to future negotiations and cannot be estimated with reasonable certainty.
Year Ended December 31, 2022 2021 2020 (In thousands) Revenue $ 2,312 $ 3,292 $ 238 Operating expenses: Customer experience 1,906 272 173 Selling, general and administrative 175,118 166,814 111,203 Research and development 314,174 144,223 154,365 Depreciation and amortization 11,098 11,518 9,781 Total operating expenses 502,296 322,827 275,522 Operating loss (499,984) (319,535) (275,284) Interest income 12,502 1,208 2,277 Interest expense (12,130) (25) (36) Change in fair value of warrants — (34,650) (371,852) Other income, net 58 182 14 Loss before income taxes (499,554) (352,820) (644,881) Income tax expense 598 79 6 Net loss $ (500,152) $ (352,899) $ (644,887) Comparison of Results of Operations for Year Ended December 31, 2022 to Year Ended December 31, 2021 Year Ended December 31, $ Change % Change 2022 2021 (In thousands, except %) Revenue $ 2,312 $ 3,292 $ (980) (29.8) % Revenue decreased by $1.0 million, or 29.8%, to $2.3 million for the year ended December 31, 2022 from $3.3 million for the year ended December 31, 2021.
Year Ended December 31, 2023 2022 2021 (In thousands) Revenue $ 6,800 $ 2,312 $ 3,292 Operating expenses: Spaceline operations 50,538 1,906 272 Research and development 295,140 314,174 144,223 Selling, general and administrative 174,864 175,118 166,814 Depreciation and amortization 13,369 11,098 11,518 Special charges 4,398 — — Total operating expenses 538,309 502,296 322,827 Operating loss (531,509) (499,984) (319,535) Interest income 42,234 12,502 1,208 Interest expense (12,872) (12,130) (25) Change in fair value of warrants — — (34,650) Other income, net 263 58 182 Loss before income taxes (501,884) (499,554) (352,820) Income tax expense 453 598 79 Net loss $ (502,337) $ (500,152) $ (352,899) 50 Table of Contents Comparison of Results of Operations for Year Ended December 31, 2023 to Year Ended December 31, 2022 Revenue Year Ended December 31, $ Change % Change 2023 2022 (In thousands, except %) Revenue $ 6,800 $ 2,312 $ 4,488 194 % Revenue for the year ended December 31, 2023 was primarily attributable to revenue generated from our commercial spaceflights and membership fees related to our Future Astronaut community.
Income Tax Expense Year Ended December 31, $ Change % Change 2022 2021 (In thousands, except %) Income tax expense $ 598 $ 79 $ 519 n.m. Income tax expense increased from $0.1 million for the year ended December 31, 2021 to $0.6 million for the year ended December 31, 2022.
Interest Expense Year Ended December 31, $ Change % Change 2023 2022 (In thousands, except %) Interest expense $ 12,872 $ 12,130 $ 742 6 % Interest expense increased from $12.1 million for the year ended December 31, 2022 to $12.9 million for the year ended December 31, 2023.
We expect to begin generating revenue from our human spaceflight program, which is expected to launch in the second quarter of 2023. To the extent this source of capital as well as the sources of capital described above are insufficient to meet our needs, we will also conduct additional offerings of our securities or may refinance debt.
We expect to generate revenue from our spaceflight program, which commenced with our first commercial spaceflight, 'Galactic 01,' in June 2023. To the extent this source of capital as well as the sources of capital described above are insufficient to meet our needs, we may need to seek additional debt or equity financing.
Factors Affecting Our Performance We believe that our performance and future success depend on a number of factors that present significant opportunities for us but also pose risks and challenges, including those discussed below and in the section of this Annual Report on Form 10-K titled “Risk Factors.” Impact of COVID-19 The COVID-19 pandemic and the protocols and procedures we implemented in response to the pandemic caused delays to our business and operations, which led to accumulated impacts to both schedule and cost efficiency and some delays in operational and maintenance activities, including delays in our test flight program.
Factors Affecting Our Performance We believe that our performance and future success depend on a number of factors that present significant opportunities for us but also pose risks and challenges, including those discussed below and in the section of this Annual Report on Form 10-K titled “Risk Factors.” Customer Demand We have already received significant interest from potential astronauts.
Depreciation and Amortization Year Ended December 31, $ Change % Change 2022 2021 (In thousands, except %) Depreciation and amortization $ 11,098 $ 11,518 $ (420) (3.6) % Depreciation and amortization expense decreased from $11.5 million for the year ended December 31, 2021 to $11.1 million for the year ended December 31, 2022, a decrease of $0.4 million when compared to 2021.
Depreciation and Amortization Year Ended December 31, $ Change % Change 2023 2022 (In thousands, except %) Depreciation and amortization $ 13,369 $ 11,098 $ 2,271 20 % Depreciation and amortization expense increased from $11.1 million for the year ended December 31, 2022 to $13.4 million for the year ended December 31, 2023.
Interest expense increased to $(12.1) million for the year ended December 31, 2022. This increase was primarily driven by interest expense and amortization of debt issuance costs related to our January 2022 senior convertible notes.
This increase was primarily driven by a full year of interest expense and amortization of debt issuance costs related to our convertible senior notes in 2023. Income Tax Expense Income tax expense was immaterial for the years ended December 31, 2023 and 2022. We have accumulated net operating losses at the U.S. federal and state levels.
Net cash used in investing activities was $387.5 million for the year ended December 31, 2021, and consisted primarily of $382.9 million in purchases of marketable securities and $4.6 million in purchases of capital expenditures.
Investing Activities Net cash used in investing activities was $116.3 million for the year ended December 31, 2023, and consisted of $1.0 billion in purchases of marketable securities and $44.3 million in capital expenditures, partially offset by $937.9 million in proceeds from maturities and calls of marketable securities.
To reduce the capacity constraint associated with having only one spaceflight system, we are currently developing our newest spaceship, VSS Imagine. We intend to expand our fleet further with our next generation vehicles, our Delta class spaceships and our next generation motherships, which will allow us to increase our annual flight rate.
As a result, our annual flight rate will be constrained by the availability and capacity of this spaceflight system. To reduce the capacity constraint associated with having only one spaceflight system, we are currently developing our next generation spaceflight vehicles.
Research and development costs consist primarily of the following costs for developing our spaceflight systems: • flight testing programs, including rocket motors, fuel, and payroll and benefits for pilots and ground crew performing test flights; • equipment, material, and labor hours (including from third-party contractors) for developing the spaceflight system’s structure, spaceflight propulsion system, and flight profiles; • rent, maintenance, and other overhead expenses allocated to the research and development departments; and • third-party fees to design and manufacture our next generation motherships, as well as manufacture key subassemblies for our next generation spaceships.
Research and development costs will consist primarily of equipment, material, and labor costs (including from 51 Table of Contents third-party contractors) for designing the spaceflight system’s structure, spaceflight propulsion system, and flight profiles for our next generation spaceships and motherships, as well as allocated facilities and other supporting overhead costs.
Our principal sources of liquidity have come from our sales of our common stock and offering of convertible senior notes ("2027 Notes").
Liquidity and Capital Resources As of December 31, 2023, we had total cash, cash equivalents and restricted cash of $253.6 million and total marketable securities of $728.8 million. Our principal sources of liquidity have come from sales of our common stock and offering of convertible senior notes ("2027 Notes").
Research and Development Research and development expense represents costs incurred to support activities that advance our human spaceflight system towards commercialization, including basic research, applied research, concept formulation studies, design, development, and related testing activities.
Research and Development Year Ended December 31, $ Change % Change 2023 2022 (In thousands, except %) Research and development $ 295,140 $ 314,174 $ (19,034) (6) % Research and development expenses represent costs incurred to support activities that advance our future fleet towards commercialization, including basic research, applied research, concept formulation studies, design, development, and related testing activities.
Issuances of Common Stock On July 12, 2021, we entered into a distribution agency agreement with Credit Suisse Securities (USA) LLC, Morgan Stanley & Co. LLC and Goldman Sachs & Co.
We anticipate the costs to manufacture additional vehicles will begin to decrease as we continue to scale up our manufacturing processes and capabilities. 54 Table of Contents Issuances of Common Stock In August 2022, we entered into a distribution agency agreement with Credit Suisse Securities (USA) LLC, Morgan Stanley & Co. LLC and Goldman Sachs & Co.
We have also leveraged our knowledge and expertise in manufacturing spaceships to occasionally perform engineering services for third parties, such as research, design, development, manufacturing and integration of advanced technology systems.
We have also leveraged our knowledge and expertise in manufacturing spaceships to occasionally perform engineering services for third parties. Recent Developments In June 2023, we completed our first commercial spaceflight, ' Galactic 01,' which marked the start of our commercial service.
Specifically, our operating expenses will increase as we: • scale up our manufacturing processes and capabilities to support expanding our fleet with additional spaceships, carrier aircraft and rocket motors upon commercialization; • pursue further research and development on our future human spaceflights, including those related to our research and education efforts on point-to-point travel; • hire additional personnel in research and development, manufacturing operations, testing programs, maintenance operations and guest services as we increase the volume of our spaceflights upon commercialization; • seek regulatory approval for any changes, upgrades or improvements to our spaceflight technologies and operations in the future, especially upon commercialization; • maintain, expand and protect our intellectual property portfolio; • establish our astronaut campus in New Mexico; and • hire additional personnel in management to support the expansion of our operational, financial, information technology, and other areas to support our operations as a public company.
Specifically, our long-term expenditures will increase as we: • scale up our manufacturing processes and capabilities to support expanding our fleet with additional spaceships, carrier aircraft and rocket motors in connection with commercialization; • hire additional personnel in manufacturing operations, testing programs, maintenance operations and guest services as we increase the volume of our spaceflights; • scale up required operational facilities, such as hangars and warehouses; and • establish our astronaut campus in New Mexico.
We believe that expanding the fleet will allow us to increase our annual flight rate once commercialization is achieved. We are dedicating significant engineering resources to the work that precedes production of the future fleet.
These next generation spaceflight vehicles, which include our Delta Class spaceships and our next generation motherships, will allow us to increase our annual flight rate. We are dedicating significant engineering resources to the work that precedes production of the future fleet. In 2023, we demonstrated the flight consistency of Unity and Eve by safely bringing our customers to space.
Research and Development Year Ended December 31, $ Change % Change 2022 2021 (In thousands, except %) Research and development $ 314,174 $ 144,223 $ 169,951 117.8 % Research and development expenses increased by $170.0 million, or 117.8%, to $314.2 million for the year ended December 31, 2022 from $144.2 million for the year ended December 31, 2021.
Research and development expenses decreased from $314.2 million for the year ended December 31, 2022 to $295.1 million for the year ended December 31, 2023.
Safety Performance of Our Spaceflight Systems Our spaceflight systems are highly specialized with sophisticated and complex technology. We have built operational processes to ensure that the design, manufacture, performance and servicing of our spaceflight systems meet rigorous quality standards.
We have built operational processes to ensure that the design, manufacture, performance and servicing of our spaceflight system meets rigorous quality standards. However, our spaceflight system is still subject to operational and process risks, such as manufacturing and design issues, human errors, or cyber-attacks.
The change in income tax expense shown above is primarily related to corporate income taxes for our operations in the United Kingdom, which operates on a cost-plus arrangement. Liquidity and Capital Resources As of December 31, 2022, we had cash, cash equivalents and restricted cash of $342.6 million and $637.1 million in marketable securities.
We maintain a full valuation allowance against our net U.S. federal and state deferred tax assets. The income tax expense is primarily related to corporate income taxes for our operations in the United Kingdom, which operates on a cost-plus arrangement.
Net cash provided by financing activities was $489.4 million for the year ended December 31, 2021, and consisted primarily of $500.0 million cash proceeds from the sale and issuance of common stock and $20.0 million in cash received from the issuance of common stock pursuant to stock options exercised, partially offset by tax withholdings paid for net settled stock-based awards of $23.4 million and transaction costs incurred for the issuance of common stock of $6.8 million. 55 Table of Contents Contractual Obligations We lease certain facilities and data centers under non-cancellable operating lease arrangements that expire at various dates through 2065.
Financing Activities Net cash provided by financing activities was $475.4 million for the year ended December 31, 2023, and consisted primarily of net cash proceeds from the sale and issuance of common stock of $478.9 million, partially offset by tax withholdings paid for net settled stock-based awards of $3.2 million.
Our missions include flying passengers to space as tourists, as well as flying scientific payloads and researchers to space in order to conduct experiments for scientific and educational purposes. Our operations include the design and development, manufacturing, ground and flight testing, and post-flight maintenance of our spaceflight system vehicles.
Overview We are an aerospace and space travel company offering access to space for private individuals, researchers and government agencies. Our missions include flying passengers to space, as well as flying scientific payloads and researchers to space in order to conduct experiments for scientific and educational purposes.
Our spaceflight system is developed using our proprietary technology and processes and is focused on providing space experiences for private astronauts, researcher flights and professional astronaut training. We intend to offer our customers a unique, multi-day experience culminating in a spaceflight that includes several minutes of weightlessness and views of Earth from space.
Our operations include the design and development, manufacturing, ground and flight testing, spaceflight operation, and post-flight maintenance of our spaceflight system. Our current spaceflight system was developed using our proprietary technology and processes and is focused on providing space experiences for private astronauts, researcher flights and professional astronaut training.
Selling, General and Administrative Selling, general and administrative expenses consist of human capital related expenses for employees involved in general corporate functions, including executive management and administration, accounting, finance, tax, legal, information technology, marketing and commercial, and human resources; rent relating to facilities, including a portion of the lease with Spaceport America, and equipment; professional fees; and other general corporate costs.
Selling, General and Administrative Year Ended December 31, $ Change % Change 2023 2022 (In thousands, except %) Selling, general and administrative $ 174,864 $ 175,118 $ (254) n.m Selling, general and administrative expenses consist primarily of compensation and other employee benefit costs for employees involved in general corporate functions, including executive management and administration, accounting, finance, legal, information technology, sales and marketing, and human resources.
As of December 31, 2022, future minimum payments under noncancellable operating leases was $110.9 million. For additional information regarding our lease obligations, see Note 16 in our consolidated financial statements included in Item 8 of this Annual Report in Form 10-K.
For additional information regarding our lease obligations, see Note 16 in our consolidated financial statements included in Item 8 of this Annual Report in Form 10-K. Funding Requirements We expect our expenditures to fluctuate in connection with our ongoing activities, particularly as we continue to advance the development of our next generation spaceflight system and leverage investments in capital expenditures.
Our contracts generally include spaceflight operations, Future Astronaut community services, and other revenue and engineering services. Inventories Inventories consist of raw materials expected to be used for the development of the human spaceflight program and customer-specific contracts. Inventories are stated at the lower of cost or net realizable value.
Inventories Inventories consist of materials expected to be used in our spaceflight operations. Inventories are stated at the lower of cost or net realizable value using the average cost method. We record a provision for excess and obsolete inventory based primarily on forecasted product demand and production requirements.
This increase was primarily due to a $18.8 million increase in salary, bonus and other employee benefits, a $7.0 million increase in consulting, legal and other professional costs, a $2.3 million increase in software licensing costs, and a $1.9 million increase in contract and subcontract labor.
This decrease was primarily driven by a $4.2 million decrease in consulting and other professional fees and a $1.2 million decrease in cash compensation and other employee benefit costs. This decrease was partially offset by a $2.8 million increase in information technology and software costs and a $2.7 million increase in marketing and promotion costs.
However, our spaceflight systems are still subject to operational and process risks, such as manufacturing and design issues, human errors, or cyber-attacks. Any actual or perceived safety issues may result in significant reputational harm to our business and our ability to generate human spaceflight revenue.
Any actual or perceived safety issues may result in significant reputational harm to our business and our ability to generate spaceflight revenue. Results of Operations The following tables set forth our results of operations for the periods presented. The period-to-period comparisons of financial results are not necessarily indicative of future results.
Interest Income Year Ended December 31, $ Change % Change 2022 2021 (In thousands, except %) Interest income $ 12,502 $ 1,208 $ 11,294 n.m Interest income increased by $11.3 million to $12.5 million for the year ended December 31, 2022 from $1.2 million for the year ended December 31, 2021.
The unpaid severance and related benefit costs of $1.4 million as of December 31, 2023 are expected to be fully paid during the first quarter of 2024. 52 Table of Contents Interest Income Year Ended December 31, $ Change % Change 2023 2022 (In thousands, except %) Interest income $ 42,234 $ 12,502 $ 29,732 238 % Interest income increased from $12.5 million for the year ended December 31, 2022 to $42.2 million for the year ended December 31, 2023.
Available Capacity and Annual Flight Rate We expect to commence commercial operations with a single spaceship, VSS Unity, and a single mothership carrier aircraft, VMS Eve, which together comprise our only spaceflight system. As a result, our annual flight rate will be constrained by the availability and capacity of this spaceflight system.
As of December 31, 2023, the tickets sold represent approximately $205 million in expected future spaceflight revenue upon completion of spaceflights. 49 Table of Contents Available Capacity and Annual Flight Rate We commenced our commercial operations with VSS Unity and VMS Eve, which together comprise our current spaceflight system.
Additionally, we are in the final phases of developing our commercial spaceflight program. While we anticipate initial commercial launch with a single spaceship, we currently have additional spaceship vehicles under construction. We anticipate the costs to manufacture additional vehicles will begin to decrease as we continue to scale up our manufacturing processes and capabilities.
While we have completed our initial commercial launch with a single spaceship, we are currently developing our next generation spaceflight vehicles.
We completed available offerings under the 2021 ATM program on July 16, 2021, generating $500.0 million in gross proceeds through the sale of 13,740,433 shares of our common stock, before deducting $6.2 million in underwriting discounts, commissions and other expenses payable by us. 56 Table of Contents On August 4, 2022, we entered into a distribution agency agreement with Credit Suisse Securities (USA) LLC, Morgan Stanley & Co.
We completed the 2022 ATM Program in June 2023, selling a total of 59.4 million shares of common stock and generating $300.0 million in gross proceeds since its inception, before deducting $3.0 million in underwriting discounts, commissions and other expenses.