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Consolidated Statements of Shareholders' Equity (Deficit) - USD ($)
$ in Thousands
Cumulative Effect, Period of Adoption, Adjustment [Member]
Common Stock [Member]
Cumulative Effect, Period of Adoption, Adjustment [Member]
Additional Paid-in Capital [Member]
Cumulative Effect, Period of Adoption, Adjustment [Member]
Retained Earnings [Member]
Cumulative Effect, Period of Adoption, Adjustment [Member]
Common Stock [Member]
Additional Paid-in Capital [Member]
Retained Earnings [Member]
Total
Balance (in shares) (Accounting Standards Update 2020-06 [Member]) at Dec. 31, 2020 0              
Balance (in shares) at Dec. 31, 2020         61,671,231      
Balance (Accounting Standards Update 2020-06 [Member]) at Dec. 31, 2020 $ 0 $ (70,777) $ (4,697) $ (75,474)        
Balance at Dec. 31, 2020         $ 616 $ 751,304 $ (872,672) $ (120,752)
Issuance of common stock upon exercise of stock options (in shares)         945,924      
Issuance of common stock upon exercise of stock options         $ 10 8,372 0 8,382
Issuance of common stock upon grant of restricted stock awards (in shares)         11,700      
Issuance of common stock upon grant of restricted stock awards         $ 0 91 0 91
At the market offering fees         0 (241) 0 (241)
Stock-based compensation         0 17,539 0 17,539
Net income (loss)         $ 0 0 194,235 194,235
Balance (in shares) at Dec. 31, 2021         62,628,855      
Balance at Dec. 31, 2021         $ 626 706,288 (683,134) 23,780
Issuance of common stock upon exercise of stock options (in shares)         101,160      
Issuance of common stock upon exercise of stock options         $ 1 414 0 415
Issuance of common stock upon grant of restricted stock awards (in shares)         98,750      
Issuance of common stock upon grant of restricted stock awards         $ 1 (1) 0 0
Stock-based compensation         0 14,072 0 14,072
Net income (loss)         $ 0 0 47,417 47,417
Balance (in shares) at Dec. 31, 2022         62,828,765      
Balance at Dec. 31, 2022         $ 628 720,773 (635,717) $ 85,684
Issuance of common stock upon exercise of stock options (in shares)         36,726     36,726
Issuance of common stock upon exercise of stock options         $ 0 150 0 $ 150
Issuance of common stock upon grant of restricted stock awards (in shares)         67,250      
Issuance of common stock upon grant of restricted stock awards         $ 1 (1) 0 0
Stock-based compensation         0 11,650 0 11,650
Net income (loss)         $ 0 0 (117,813) (117,813)
Repurchases of common stock (in shares)         (1,804,144)      
Repurchases of common stock         $ (18) (4,636) 0 (4,654)
Balance (in shares) at Dec. 31, 2023         61,128,597      
Balance at Dec. 31, 2023         $ 611 $ 727,936 $ (753,530) $ (24,983)