Consolidated Statements Of Shareholders' Equity (Deficit) - USD ($) $ in Thousands	Common Stock	Treasury Stock	Additional Paid-In Capital	Retained Earnings (Deficit)	Total
Balance, Treasury Shares		(7,555,000)
Balance at Dec. 31, 2016	$ 6,611	$ (37,933)	$ 70,268	$ (39,304)	$ (358)
Balance, Shares at Dec. 31, 2016	66,110,000
Shares issued - stock-based compensation	$ 33		6		39
Shares issued - stock-based compensation, Shares	334,000
Stock-based compensation expense			977		977
Treasury stock acquired		$ (20)			(20)
Treasury stock acquired, Shares		(26,000)
Net income				9,651	9,651
Balance at Dec. 31, 2017	$ 6,644	$ (37,953)	71,251	(29,653)	10,289
Balance, Shares at Dec. 31, 2017	66,444,000	(7,581,000)
Shares issued - stock-based compensation	$ 73	$ 177	287		537
Shares issued - stock-based compensation, Shares	724,000	35,000
Stock-based compensation expense			820		820
Treasury stock acquired		$ (51)			(51)
Treasury stock acquired, Shares		(26,000)
Net income				98,232	98,232
Balance at Dec. 31, 2018	$ 6,717	$ (37,827)	72,358	68,579	$ 109,827
Balance, Shares at Dec. 31, 2018	67,168,000
Balance, Treasury Shares		(7,572,000)			(7,572,251)
Shares issued - stock-based compensation	$ 50		206		$ 256
Shares issued - stock-based compensation, Shares	506,000	(10,000)
Stock-based compensation expense			985		985
Treasury stock acquired		$ (3,602)		(309)	(3,911)
Treasury stock acquired, Shares		(2,067,000)
Net income				2,563	2,563
Balance at Dec. 31, 2019	$ 6,767	$ (41,429)	$ 73,549	$ 70,833	$ 109,720
Balance, Shares at Dec. 31, 2019	67,674,000
Balance, Treasury Shares		(9,649,000)			(9,649,216)