Condensed Consolidated Statements of Shareholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Common Stock [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Beginning balance at Dec. 31, 2018	$ 318,947	$ 286,597	$ 32,373	$ (23)
Beginning balance, shares at Dec. 31, 2018		32,325,000
Net income	5,974		5,974
Comprehensive income (loss)	32			32
Stock based compensation	516	$ 516
Common stock issued under stock plans, net of shares withheld for employee taxes	(328)	$ (328)
Common stock issued under stock plans, net of shares withheld for employee taxes, shares		63,000
Ending balance at Mar. 31, 2019	325,141	$ 286,785	38,347	9
Ending balance, shares at Mar. 31, 2019		32,388,000
Beginning balance at Dec. 31, 2019	$ 338,168	$ 290,021	48,143	4
Beginning balance, shares at Dec. 31, 2019	32,379,000	32,379,000
Net income	$ 7,092		7,092
Comprehensive income (loss)	(145)			(145)
Stock based compensation	550	$ 550
Common stock issued under stock plans, net of shares withheld for employee taxes	(373)	$ (373)
Common stock issued under stock plans, net of shares withheld for employee taxes, shares		62,000
Repurchase of common stock	$ (9,876)	$ (9,876)
Repurchase of common stock, shares	(438,142)	(438,000)
Ending balance at Mar. 31, 2020	$ 335,416	$ 280,322	$ 55,235	$ (141)
Ending balance, shares at Mar. 31, 2020	32,003,000	32,003,000