UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Total
Beginning balance, value at Dec. 31, 2020	$ 13	$ 4,430,924	$ (4,190,425)	$ 240,512
Beginning Balance, Shares at Dec. 31, 2020	12,792,586
Stock-based compensation		177		177
Issuance of common stock upon vesting of restricted stock
Issuance of common stock upon vesting of restricted stock, Shares	3,021
Net income			3,389	3,389
Ending balance, value at Mar. 31, 2021	$ 13	4,431,101	(4,187,036)	244,078
Ending Balance, Shares at Mar. 31, 2021	12,795,607
Beginning balance, value at Dec. 31, 2021	$ 13	4,431,719	(4,164,496)	267,236
Beginning Balance, Shares at Dec. 31, 2021	12,836,133
Stock-based compensation		85		85
Issuance of common stock upon vesting of restricted stock
Issuance of common stock upon vesting of restricted stock, Shares	5,495
Forfeiture of restricted stock, Shares	(6,815)
Net income			3,478	3,478
Ending balance, value at Mar. 31, 2022	$ 13	$ 4,431,804	$ (4,161,018)	$ 270,799
Ending Balance, Shares at Mar. 31, 2022	12,834,813