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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Cash flows from operating activities: |  |  |
Net income (loss) | $ 11,706 | $ 147 | $ (5,822)
Adjustments to reconcile net income (loss) to net cash provided by operating activities: |  |  |
Depreciation and amortization | 7,219 | 7,666 | 8,331
Amortization of debt issuance and warrant costs and other | 1,349 | 1,276 | 1,184
Stock-based compensation | 966 | 405 | 348
Change in fair value of stock warrants | 1,347 | 598 | 1,230
Loss on disposal of assets, net | 676 | 684 | 8
Proceeds from insurance related to property damage | 1,334 |  |
Loss on extinguishment of debt, net | 409 |  |
Increases and decreases in operating assets and liabilities: |  |  |
Accounts receivable | 211 | (2,698) | (171)
Prepaid expenses, inventories and other | (1,414) | 1,660 | (678)
Deferred taxes | 435 | (92) | 80
Common stock warrant liability | (4,000) |  |
Contract liabilities | (234) | 785 | 5,985
Accounts payable and accrued expenses | 9,500 | (1,440) | (26)
Net cash provided by operating activities | 29,504 | 8,991 | 10,469
Cash flows from investing activities: |  |  |
Purchase of property and equipment | (36,991) | (2,638) | (8,088)
Other | (226) | 19 | (582)
Net cash used in investing activities | (37,217) | (2,619) | (8,670)
Cash flows from financing activities: |  |  |
Proceeds from equity offering, net of issuance costs | 42,974 |  |
Proceeds from CARES Act unsecured loans |  | 5,606 |
Payment of debt discount and issuance costs | (9,429) | (2,548) | (1,188)
Repayment of Senior Secured Notes due 2024 | (106,825) | (1,100) | (1,075)
Prepayment premiums of Senior Secured Notes due 2024 | (1,261) |  |
Repayment of finance lease obligation | (492) | (488) | (544)
Proceeds from exercise of stock options | 392 | 29 | 225
Other | (51) | (24) |
Net cash provided by financing activities | 235,308 | 1,475 | 7,418
Net increase in cash, cash equivalents and restricted cash | 227,595 | 7,847 | 9,217
Cash, cash equivalents and restricted cash, beginning of period | 37,698 | 29,851 | 20,634
Cash, cash equivalents and restricted cash, end of period | 265,293 | 37,698 | 29,851
Supplemental Cash Flow Information: |  |  |
Cash paid for interest, net of amounts capitalized | 12,373 | 8,514 | 9,550
Non-Cash Investing Activities and Financing Activities: |  |  |
Accounts payable related capital expenditures | 4,899 | $ 298 | 515
Gain on extinguishment of CARES Act unsecured loans | 5,696 |  |
Senior Secured Notes Due 2028 |  |  |
Cash flows from financing activities: |  |  |
Proceeds from Senior Secured Notes | $ 310,000 |  |
Senior Secured Notes Due 2024 |  |  |
Cash flows from financing activities: |  |  |
Proceeds from Senior Secured Notes |  |  | $ 10,000

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