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, 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			120			120
Release of Restricted Shares (in shares)	98
Common Stock Repurchased		$ (316)				(316)
Common Stock Repurchased, (in treasury shares)		48
Translation Adjustment					45	45
Net Income				12,235		12,235
Ending Balance at Mar. 31, 2020	$ 30	$ (142,630)	218,736	98,733	$ (1,535)	173,334
Ending Balance (in shares) at Mar. 31, 2020	28,812	1,293
Beginning Balance at Dec. 31, 2020	$ 30	$ (142,977)	222,628	147,925		227,606
Beginning Balance (in shares) at Dec. 31, 2020	28,911	1,318
Stock-Based Compensation Expense			1,230			1,230
Exercise of Stock Options			41			41
Exercise of Stock Options (in shares)	3
Release of Restricted Shares (in shares)	111
Common Stock Repurchased		$ (1,375)				(1,375)
Common Stock Repurchased (in shares)		55
Net Income				10,622		10,622
Ending Balance at Mar. 31, 2021	$ 30	$ (144,352)	$ 223,899	$ 158,547		$ 238,124
Ending Balance (in shares) at Mar. 31, 2021	29,025	1,373