Condensed Consolidated Statements of Equity - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock [Member]	Treasury Stock [Member]	Additional Paid-In Capital [Member]	Retained Earnings (Accumulated Deficit) [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
BALANCE - value at Dec. 31, 2018	$ 214,928	$ 6	$ (1,433)	$ 295,135	$ (74,971)	$ (3,809)
BALANCE - shares at Dec. 31, 2018		62,830	(278)
Cumulative effect of recent accounting pronouncements	2,802				2,802
Share-based compensation, value	2,201			2,201
Share-based compensation, shares		31
Vesting of restricted stock units and impact of shares withheld for taxes, value	(2,188)			(2,188)
Vesting of restricted stock units and impact of shares withheld for taxes, shares		453
Exercise of stock options and purchases from employee stock purchase plan, value	1,626			1,626
Exercise of stock options and purchases from employee stock purchase plan, shares		286
Net income	17,168				17,168
Other comprehensive income (loss)—net of tax	2,740					2,740
BALANCE - value at Mar. 31, 2019	239,277	$ 6	$ (1,433)	296,774	(55,001)	(1,069)
BALANCE - shares at Mar. 31, 2019		63,600	(278)
BALANCE - value at Dec. 31, 2019	279,399	$ 6		302,189	(23,091)	295
BALANCE - shares at Dec. 31, 2019		64,283
Share-based compensation, value	1,675			1,675
Share-based compensation, shares		39
Vesting of restricted stock units and impact of shares withheld for taxes, value	(1,928)			(1,928)
Vesting of restricted stock units and impact of shares withheld for taxes, shares		388
Exercise of stock options and purchases from employee stock purchase plan, value	622			622
Exercise of stock options and purchases from employee stock purchase plan, shares		85
Net income	33,987				33,987
Other comprehensive income (loss)—net of tax	(7,126)					(7,126)
BALANCE - value at Mar. 31, 2020	$ 306,629	$ 6		$ 302,558	$ 10,896	$ (6,831)
BALANCE - shares at Mar. 31, 2020		64,795