CONDENSED CONSOLIDATED STATEMENTS OF EQUITY - USD ($) shares in Thousands, $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment	Cumulative Effect, Period of Adoption, Adjusted Balance	Common Stock	Common Stock Cumulative Effect, Period of Adoption, Adjusted Balance	Additional Paid-in Capital	Additional Paid-in Capital Cumulative Effect, Period of Adoption, Adjusted Balance	Accumulated Other Comprehensive Loss	Accumulated Other Comprehensive Loss Cumulative Effect, Period of Adoption, Adjusted Balance	Treasury Stock	Treasury Stock Cumulative Effect, Period of Adoption, Adjusted Balance	Retained Earnings	Retained Earnings Cumulative Effect, Period of Adoption, Adjustment	Retained Earnings Cumulative Effect, Period of Adoption, Adjusted Balance
Beginning balance (in shares) at Dec. 31, 2018				34,457	34,457
Beginning balance at Dec. 31, 2018	$ 158,491	$ (39)	$ 158,452	$ 34	$ 34	$ 96,486	$ 96,486	$ (1,410)	$ (1,410)	$ (49,733)	$ (49,733)	$ 113,114	$ (39)	$ 113,075
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(11,078)											(11,078)
Other comprehensive income (loss)	(956)							(956)
Treasury stock purchase	(722)									(722)
Restricted stock release (in shares)				241
Employee stock purchase plan release (in shares)				7
Employee stock purchase plan release	61					61
Stock-based compensation expense	3,291					3,291
Payment of withholding taxes on restricted stock units	(887)					(887)
Shares issued as consideration for acquisition (in shares)				1,458
Shares issued as consideration for acquisition	12,968			$ 2		12,966
Ending balance (in shares) at Sep. 30, 2019				36,163
Ending balance at Sep. 30, 2019	161,129			$ 36		111,917		(2,366)		(50,455)		101,997
Beginning balance (in shares) at Jun. 30, 2019				36,140
Beginning balance at Jun. 30, 2019	152,750			$ 36		111,279		(1,425)		(50,455)		93,315
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	8,682											8,682
Other comprehensive income (loss)	(941)							(941)
Restricted stock release (in shares)				19
Employee stock purchase plan release (in shares)				4
Employee stock purchase plan release	48
Stock-based compensation expense	631					631
Payment of withholding taxes on restricted stock units	(41)					(41)
Ending balance (in shares) at Sep. 30, 2019				36,163
Ending balance at Sep. 30, 2019	161,129			$ 36		111,917		(2,366)		(50,455)		101,997
Beginning balance (in shares) at Dec. 31, 2019				36,610	36,610
Beginning balance at Dec. 31, 2019	191,479	$ (359)	$ 191,120	$ 37	$ 37	116,533	$ 116,533	(1,631)	$ (1,631)	(50,455)	$ (50,455)	126,995	$ (359)	$ 126,636
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(72,669)											(72,669)
Other comprehensive income (loss)	669							669
Restricted stock release (in shares)				270
Employee stock purchase plan release (in shares)				4
Employee stock purchase plan release	39					39
Stock-based compensation expense	3,930					3,930
Payment of withholding taxes on restricted stock units	(314)					(314)
Ending balance (in shares) at Sep. 30, 2020				36,884
Ending balance at Sep. 30, 2020	122,775			$ 37		120,188		(962)		(50,455)		53,967
Beginning balance (in shares) at Jun. 30, 2020				36,884
Beginning balance at Jun. 30, 2020	114,958			$ 37		118,862		(1,234)		(50,455)		47,748
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	6,219											6,219
Other comprehensive income (loss)	272							272
Stock-based compensation expense	1,326					1,326
Payment of withholding taxes on restricted stock units						0
Ending balance (in shares) at Sep. 30, 2020				36,884
Ending balance at Sep. 30, 2020	$ 122,775			$ 37		$ 120,188		$ (962)		$ (50,455)		$ 53,967