CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Total
Balances at December 31, 2019 at Dec. 31, 2019	$ 13	$ 4,432,146	$ (4,195,627)	$ 236,532
Beginning Balance, Shares at Dec. 31, 2019	12,917,348
Stock-based compensation		728		728
Issuance of common stock upon vesting of restricted stock
Issuance of common stock, Shares	24,940
Issuances of common stock in lieu of employee cash bonuses		60		60
Issuance of common stock in lieu of payment of employee cash bonuses, Shares	5,200
Repurchases of common stock in open market		(2,010)		(2,010)
Repurchases of common stock in open market, Shares	(154,902)
Net income			5,202	5,202
Net settlement for employee taxes on restricted stock and options
Balances at December 31, 2021 at Dec. 31, 2020	$ 13	4,430,924	(4,190,425)	240,512
Ending Balance, Shares at Dec. 31, 2020	12,792,586
Stock-based compensation		1,163		1,163
Issuance of common stock upon vesting of restricted stock
Issuance of common stock, Shares	18,978
Issuances of common stock in lieu of employee cash bonuses
Net income			25,929	25,929
Net settlement for employee taxes on restricted stock and options		(368)		(368)
Stock options exercised, net, Shares	24,569
Balances at December 31, 2021 at Dec. 31, 2021	$ 13	$ 4,431,719	$ (4,164,496)	$ 267,236
Ending Balance, Shares at Dec. 31, 2021	12,836,133