Condensed Consolidated Statements of Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands	Common Stock [Member]	Treasury Stock [Member]	Additional Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Total
Beginning Balance at Dec. 31, 2018	$ 32	$ (141,828)	$ 213,744	$ 76,835	$ (1,385)	$ 147,398
Beginning Balance (in shares) at Dec. 31, 2018	28,627	2,951
Stock-Based Compensation Expense			2,415			2,415
Release of Restricted Shares (in shares)	74
Common Stock Repurchased and Transferred	$ (2)	$ (441)				(443)
Common Stock Repurchased and Transferred, (in treasury shares)		(1,712)
Translation Adjustment					(192)	(192)
Net Income (Loss)				(7,780)		(7,780)
Ending Balance at Jun. 30, 2019	$ 30	$ (142,269)	216,159	69,055	(1,577)	141,398
Ending Balance (in shares) at Jun. 30, 2019	28,701	1,239
Beginning Balance at Dec. 31, 2018	$ 32	$ (141,828)	213,744	76,835	(1,385)	$ 147,398
Beginning Balance (in shares) at Dec. 31, 2018	28,627	2,951
Common Stock Repurchased (in shares)						0
Ending Balance at Dec. 31, 2019	$ 30	$ (142,314)	218,616	86,498	(1,580)	$ 161,250
Ending Balance (in shares) at Dec. 31, 2019	28,714	1,245
Beginning Balance at Mar. 31, 2019	$ 32	$ (142,157)	214,798	71,911	(1,268)	143,316
Beginning Balance (in shares) at Mar. 31, 2019	28,682	2,979
Stock-Based Compensation Expense			1,361			1,361
Release of Restricted Shares (in shares)	19
Common Stock Repurchased and Transferred	$ (2)	$ (112)				(114)
Common Stock Repurchased and Transferred, (in treasury shares)		(1,740)
Translation Adjustment					(309)	(309)
Net Income (Loss)				(2,856)		(2,856)
Ending Balance at Jun. 30, 2019	$ 30	$ (142,269)	216,159	69,055	(1,577)	141,398
Ending Balance (in shares) at Jun. 30, 2019	28,701	1,239
Beginning Balance at Dec. 31, 2019	$ 30	$ (142,314)	218,616	86,498	(1,580)	161,250
Beginning Balance (in shares) at Dec. 31, 2019	28,714	1,245
Stock-Based Compensation Expense			966			966
Exercise of Stock Options			36			36
Exercise of Stock Options (in shares)	3
Release of Restricted Shares (in shares)	135
Common Stock Repurchased		$ (438)				$ (438)
Common Stock Repurchased (in shares)		64				0
Translation Adjustment					272	$ 272
Net Income (Loss)				14,874		14,874
Ending Balance at Jun. 30, 2020	$ 30	$ (142,752)	219,618	101,372	(1,308)	176,960
Ending Balance (in shares) at Jun. 30, 2020	28,852	1,309
Beginning Balance at Mar. 31, 2020	$ 30	$ (142,630)	218,736	98,733	(1,535)	173,334
Beginning Balance (in shares) at Mar. 31, 2020	28,812	1,293
Stock-Based Compensation Expense			846			846
Exercise of Stock Options			36			36
Exercise of Stock Options (in shares)	3
Release of Restricted Shares (in shares)	37
Common Stock Repurchased		$ (122)				(122)
Common Stock Repurchased (in shares)		16
Translation Adjustment					227	227
Net Income (Loss)				2,639		2,639
Ending Balance at Jun. 30, 2020	$ 30	$ (142,752)	$ 219,618	$ 101,372	$ (1,308)	$ 176,960
Ending Balance (in shares) at Jun. 30, 2020	28,852	1,309