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CONDENSED CONSOLIDATED STATEMENT OF CHANGES IN STOCKHOLDERS' EQUITY (Unaudited) - USD ($) $ in Thousands | Total | Common Stock | Warrants | Additional Paid-In Capital | Accumulated Deficit
--- | --- | --- | --- | --- | ---
Beginning balance (in shares) at Dec. 31, 2018 |  | 35,687,000 | 6,604,000 |  |
Beginning balance at Dec. 31, 2018 | $ 847,721 | $ 36 | $ 88,516 | $ 1,055,164 | $ (295,995)
Increase (Decrease) in Stockholders' Equity |  |  |  |  |
Stock-based compensation | 1,073 |  |  | 1,073 |
Issuance of warrants for general unsecured claims (in shares) |  |  | 1,000 |  |
Issuance of warrants for general unsecured claims | 0 |  | $ 2 | (2) |
Net loss | (5,277) |  |  |  | (5,277)
Ending balance (in shares) at Mar. 31, 2019 |  | 35,687,000 | 6,605,000 |  |
Ending balance at Mar. 31, 2019 | $ 843,460 | $ 36 | $ 88,518 | 1,056,235 | (301,329)
Beginning balance (in shares) at Dec. 31, 2019 | 35,772,000 | 35,772,000 | 6,659,000 |  |
Beginning balance at Dec. 31, 2019 | $ 402,452 | $ 36 | $ 88,520 | 1,059,253 | (745,357)
Increase (Decrease) in Stockholders' Equity |  |  |  |  |
Stock-based compensation | 185 |  |  | 185 |
Issuance of common stock for general unsecured claims (in shares) |  | 38,000 |  |  |
Issuance of common stock for general unsecured claims | 0 |  |  |  |
Issuance of warrants for general unsecured claims (in shares) |  |  | 47,000 |  |
Issuance of warrants for general unsecured claims | 0 |  |  |  |
Cash paid for tax withholdings on vested stock awards | (1) |  |  | (1) |
Net loss | $ (12,670) |  |  |  | (12,670)
Ending balance (in shares) at Mar. 31, 2020 | 35,810,000 | 35,810,000 | 6,706,000 |  |
Ending balance at Mar. 31, 2020 | $ 389,966 | $ 36 | $ 88,520 | $ 1,059,437 | $ (758,027)

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