Condensed Consolidated Statements of Stockholders Equity (Unaudited) - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Total
Balance (in shares) at Dec. 31, 2019	8,436,498
Balance at Dec. 31, 2019	$ 84	$ 421,740	$ (318,005)	$ 103,819
Net income (loss)	0	0	(41,813)	(41,813)
Stock-based compensation	$ 0	599		599
Restricted stock issued, net of forfeitures (in shares)	(14,588)
Restricted stock issued, net of forfeitures	$ 0	0	0	0
Balance (in shares) at Jun. 30, 2020	8,421,910
Balance at Jun. 30, 2020	$ 84	422,339	(359,818)	62,605
Balance (in shares) at Mar. 31, 2020	8,421,910
Balance at Mar. 31, 2020	$ 84	421,970	(276,562)	145,492
Net income (loss)	0	0	(83,256)	(83,256)
Stock-based compensation	$ 0	369	0	369
Balance (in shares) at Jun. 30, 2020	8,421,910
Balance at Jun. 30, 2020	$ 84	422,339	(359,818)	$ 62,605
Balance (in shares) at Dec. 31, 2020	8,421,910			8,421,910
Balance at Dec. 31, 2020	$ 84	429,476	(502,527)	$ (72,967)
Net income (loss)	0	0	(37,695)	(37,695)
Stock-based compensation	$ 0	507	0	$ 507
Balance (in shares) at Jun. 30, 2021	8,421,910			8,421,910
Balance at Jun. 30, 2021	$ 84	429,983	(540,222)	$ (110,155)
Balance (in shares) at Mar. 31, 2021	8,421,910
Balance at Mar. 31, 2021	$ 84	429,787	(526,217)	(96,346)
Net income (loss)	0	0	(14,005)	(14,005)
Stock-based compensation	$ 0	196	0	$ 196
Balance (in shares) at Jun. 30, 2021	8,421,910			8,421,910
Balance at Jun. 30, 2021	$ 84	$ 429,983	$ (540,222)	$ (110,155)