Condensed Consolidated Statements of Stockholders' Equity - USD ($) shares in Thousands	Common Stock [Member]	Treasury Stock [Member]	Additional Capital [Member]	Retained Earnings [Member]	Total
Beginning Balance at Dec. 31, 2020	$ 30,000	$ (142,977,000)	$ 222,628,000	$ 147,925,000	$ 227,606,000
Beginning Balance (in shares) at Dec. 31, 2020	28,911
Beginning Balance, Treasury (in shares) at Dec. 31, 2020		1,318
Stock-Based Compensation Expense			3,945,000		3,945,000
Exercise of Stock Options			63,000		63,000
Exercise of Stock Options (in shares)	6
Release of Restricted Shares (in shares)	172
Common Stock Repurchased		$ (2,101,000)			(2,101,000)
Common Stock Repurchased, (in treasury shares)		89
Net Income				31,390,000	31,390,000
Ending Balance at Sep. 30, 2021	$ 30,000	$ (145,078,000)	226,636,000	179,315,000	260,903,000
Ending Balance, Treasury (in shares) at Sep. 30, 2021		1,407
Ending Balance (in shares) at Sep. 30, 2021	29,089
Beginning Balance at Jun. 30, 2021	$ 30,000	$ (144,788,000)	225,287,000	170,536,000	251,065,000
Beginning Balance (in shares) at Jun. 30, 2021	29,063
Beginning Balance, Treasury (in shares) at Jun. 30, 2021		1,392
Stock-Based Compensation Expense			1,349,000		1,349,000
Release of Restricted Shares (in shares)	26
Common Stock Repurchased		$ (290,000)			(290,000)
Common Stock Repurchased, (in treasury shares)		15
Net Income				8,779,000	8,779,000
Ending Balance at Sep. 30, 2021	$ 30,000	$ (145,078,000)	226,636,000	179,315,000	260,903,000
Ending Balance, Treasury (in shares) at Sep. 30, 2021		1,407
Ending Balance (in shares) at Sep. 30, 2021	29,089
Beginning Balance at Dec. 31, 2021	$ 31,000	$ (145,337,000)	227,804,000	189,623,000	$ 272,121,000
Beginning Balance (in shares) at Dec. 31, 2021	29,113
Beginning Balance, Treasury (in shares) at Dec. 31, 2021		1,423			1,423
Stock-Based Compensation Expense			2,818,000		$ 2,818,000
Exercise of Stock Options			296,000		296,000
Exercise of Stock Options (in shares)	21
Release of Restricted Shares (in shares)	123
Common Stock Repurchased		$ (7,947,000)			(7,947,000)
Common Stock Repurchased, (in treasury shares)		634
Common Stock Repurchased (in shares)	(571)
Net Income				2,999,000	2,999,000
Ending Balance at Sep. 30, 2022	$ 31,000	$ (153,284,000)	230,918,000	192,622,000	$ 270,287,000
Ending Balance, Treasury (in shares) at Sep. 30, 2022		2,057			2,057
Ending Balance (in shares) at Sep. 30, 2022	28,686
Beginning Balance at Jun. 30, 2022	$ 31,000	$ (153,244,000)	230,086,000	196,396,000	$ 273,269,000
Beginning Balance (in shares) at Jun. 30, 2022	28,680
Beginning Balance, Treasury (in shares) at Jun. 30, 2022		2,053
Stock-Based Compensation Expense			832,000		832,000
Release of Restricted Shares (in shares)	6
Common Stock Repurchased		$ (40,000)			(40,000)
Common Stock Repurchased, (in treasury shares)		4
Net Income				(3,774,000)	(3,774,000)
Ending Balance at Sep. 30, 2022	$ 31,000	$ (153,284,000)	$ 230,918,000	$ 192,622,000	$ 270,287,000
Ending Balance, Treasury (in shares) at Sep. 30, 2022		2,057			2,057
Ending Balance (in shares) at Sep. 30, 2022	28,686