CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (unaudited) - USD ($) $ in Thousands	Total	Common Stock	Treasury Stock	Additional Paid-in Capital	Accumulated Deficit	Accumulated Other Comprehensive Loss	Adjustment	Adjustment Accumulated Deficit
Beginning balance at Dec. 31, 2019	$ 148,535	$ 67	$ (3)	$ 436,557	$ (283,562)	$ (4,524)	$ (729)	$ (729)
Beginning balance (in shares) at Dec. 31, 2019		66,543,073	(2,709,830)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock issued upon exercise of stock options	1,955			1,955
Common stock issued upon exercise of stock options (in shares)		199,215
Common stock issued upon vesting of restricted stock units (RSU)	0
Common stock issued upon vesting of restricted stock units (in shares)		203,690
Common stock as earn-out payment in connection with AdvantageTec Inc.	294	$ 1		293
Common stock as earnout payment in connection with AdvantageTec Inc. (in shares)		11,508
Stock-based compensation	9,519			9,519
Cash awards settled in shares of the Company’s common stock	24,656			24,656
Cash awards settled in shares of the company's common stock (in shares)		991,905
Common stock issued under Employee Stock Purchase Plan	1,626			1,626
Common stock issued under Employee Stock Purchase Plan (in shares)		50,818
Net loss	(37,001)				(37,001)
Other comprehensive loss	(2,469)					(2,469)
Ending balance at Mar. 31, 2020	146,386	$ 68	$ (3)	474,606	(321,292)	(6,993)
Ending balance (in shares) at Mar. 31, 2020		68,000,209	(2,709,830)
Beginning balance at Dec. 31, 2019	148,535	$ 67	$ (3)	436,557	(283,562)	(4,524)	$ (729)	$ (729)
Beginning balance (in shares) at Dec. 31, 2019		66,543,073	(2,709,830)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(55,628)
Ending balance at Jun. 30, 2020	143,314	$ 69	$ (3)	488,229	(339,919)	(5,062)
Ending balance (in shares) at Jun. 30, 2020		68,731,477	(2,709,830)
Beginning balance at Mar. 31, 2020	146,386	$ 68	$ (3)	474,606	(321,292)	(6,993)
Beginning balance (in shares) at Mar. 31, 2020		68,000,209	(2,709,830)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock issued upon exercise of stock options	5,079			5,079
Common stock issued upon exercise of stock options (in shares)		403,443
Common stock issued upon vesting of restricted stock units (RSU)	1	$ 1
Common stock issued upon vesting of restricted stock units (in shares)		298,114
Stock-based compensation	7,433			7,433
Common stock issued under Employee Stock Purchase Plan	1,111			1,111
Common stock issued under Employee Stock Purchase Plan (in shares)		29,711
Net loss	(18,627)				(18,627)
Other comprehensive loss	1,931					1,931
Ending balance at Jun. 30, 2020	143,314	$ 69	$ (3)	488,229	(339,919)	(5,062)
Ending balance (in shares) at Jun. 30, 2020		68,731,477	(2,709,830)
Beginning balance at Dec. 31, 2020	243,934	$ 70	$ (3)	635,672	(391,885)	80
Beginning balance (in shares) at Dec. 31, 2020		70,264,265	(2,709,830)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock issued upon exercise of stock options	2,617			2,617
Common stock issued upon exercise of stock options (in shares)		209,185
Common stock issued upon vesting of restricted stock units (RSU)	0	$ 1		(1)
Common stock issued upon vesting of restricted stock units (in shares)		454,508
Stock-based compensation	9,225			9,225
Cash awards settled in shares of the Company’s common stock	25,925			25,925
Cash awards settled in shares of the company's common stock (in shares)		400,700
Common stock issued under Employee Stock Purchase Plan	1,257			1,257
Common stock issued under Employee Stock Purchase Plan (in shares)		22,544
Net loss	(21,195)				(21,195)
Other comprehensive loss	(1,746)					(1,746)
Ending balance at Mar. 31, 2021	260,017	$ 71	$ (3)	674,695	(413,080)	(1,666)
Ending balance (in shares) at Mar. 31, 2021		71,351,202	(2,709,830)
Beginning balance at Dec. 31, 2020	$ 243,934	$ 70	$ (3)	635,672	(391,885)	80
Beginning balance (in shares) at Dec. 31, 2020		70,264,265	(2,709,830)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock issued upon exercise of stock options (in shares)	461,000
Net loss	$ (42,314)
Ending balance at Jun. 30, 2021	261,692	$ 72	$ (3)	696,923	(434,199)	(1,101)
Ending balance (in shares) at Jun. 30, 2021		72,017,145	(2,709,830)
Beginning balance at Mar. 31, 2021	260,017	$ 71	$ (3)	674,695	(413,080)	(1,666)
Beginning balance (in shares) at Mar. 31, 2021		71,351,202	(2,709,830)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock issued upon exercise of stock options	3,999			3,999
Common stock issued upon exercise of stock options (in shares)		252,155
Common stock issued upon vesting of restricted stock units (RSU)	0	$ 1		(1)
Common stock issued upon vesting of restricted stock units (in shares)		252,218
Stock-based compensation	9,524			9,524
Cash awards settled in shares of the Company’s common stock	7,578			7,578
Cash awards settled in shares of the company's common stock (in shares)		137,300
Common stock issued under Employee Stock Purchase Plan	1,128			1,128
Common stock issued under Employee Stock Purchase Plan (in shares)		24,270
Net loss	(21,119)				(21,119)
Other comprehensive loss	565					565
Ending balance at Jun. 30, 2021	$ 261,692	$ 72	$ (3)	$ 696,923	$ (434,199)	$ (1,101)
Ending balance (in shares) at Jun. 30, 2021		72,017,145	(2,709,830)