Consolidated Statement of Stockholders' Equity - USD ($) $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment	Common Stock	Additional Paid-In Capital	Accumulated Other Comprehensive Loss	Accumulated Deficit	Accumulated Deficit Cumulative Effect, Period of Adoption, Adjustment
Beginning balance (in shares) at Dec. 31, 2018			21,489,112
Beginning balance at Dec. 31, 2018	$ 87,307		$ 2	$ 180,481	$ (7,501)	$ (85,675)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock in business combination (in shares)			7,898
Issuance of common stock in business combination	(30)			(30)
Issuance of stock under Company plans, net of shares withheld for tax (in shares)			(30,917)
Issuance of stock under Company plans, net of shares withheld for tax	(5,643)			(5,643)
Issuance of stock, net of issuance costs (in shares)			3,795,000
Issuance of stock, net of issuance costs	151,114		$ 1	151,113
Stock-based compensation	18,716			18,716
Foreign currency translation adjustment	(681)				(681)
Unrealized translation gain (loss) on foreign currency denominated intercompany loans	(3,610)				(3,610)
Unrealized loss on interest rate swaps	(3,379)				(3,379)
Net loss	(25,506)					(25,506)
Ending balance (in shares) at Sep. 30, 2019			25,261,093
Ending balance at Sep. 30, 2019	218,288		$ 3	344,637	(15,171)	(111,181)
Beginning balance (in shares) at Jun. 30, 2019			25,247,707
Beginning balance at Jun. 30, 2019	232,972		$ 3	338,732	(6,889)	(98,874)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock in business combination (in shares)			4,247
Issuance of common stock in business combination	0			0
Issuance of stock under Company plans, net of shares withheld for tax (in shares)			9,139
Issuance of stock under Company plans, net of shares withheld for tax	(1,243)			(1,243)
Issuance of stock, net of issuance costs (in shares)			0
Issuance of stock, net of issuance costs	(39)		$ 0	(39)
Stock-based compensation	7,187			7,187
Foreign currency translation adjustment	(1,293)				(1,293)
Unrealized translation gain (loss) on foreign currency denominated intercompany loans	(3,610)				(3,610)
Unrealized loss on interest rate swaps	(3,379)				(3,379)
Net loss	(12,307)					(12,307)
Ending balance (in shares) at Sep. 30, 2019			25,261,093
Ending balance at Sep. 30, 2019	$ 218,288		$ 3	344,637	(15,171)	(111,181)
Beginning balance (in shares) at Dec. 31, 2019	25,250,120		25,250,120
Beginning balance at Dec. 31, 2019	$ 212,861	$ (108)	$ 3	345,127	(1,223)	(131,046)	$ (108)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of stock under Company plans, net of shares withheld for tax (in shares)			185,468
Issuance of stock under Company plans, net of shares withheld for tax	(2,066)			(2,066)
Issuance of stock, net of issuance costs (in shares)			4,025,000
Issuance of stock, net of issuance costs	130,101			130,101
Stock-based compensation	31,263			31,263
Foreign currency translation adjustment	494				494
Unrealized translation gain (loss) on foreign currency denominated intercompany loans	(3,254)				(3,254)
Unrealized loss on interest rate swaps	(35,497)				(35,497)
Net loss	$ (45,550)					(45,550)
Ending balance (in shares) at Sep. 30, 2020	29,460,588		29,460,588
Ending balance at Sep. 30, 2020	$ 288,244		$ 3	504,425	(39,480)	(176,704)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accounting Standards Update [Extensible List]	us-gaap:AccountingStandardsUpdate201613Member
Beginning balance (in shares) at Jun. 30, 2020			25,365,735
Beginning balance at Jun. 30, 2020	$ 152,237		$ 3	363,328	(45,700)	(165,394)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of stock under Company plans, net of shares withheld for tax (in shares)			69,853
Issuance of stock under Company plans, net of shares withheld for tax	20			20
Issuance of stock, net of issuance costs (in shares)			4,025,000
Issuance of stock, net of issuance costs	130,114			130,114
Stock-based compensation	10,963			10,963
Foreign currency translation adjustment	2,734				2,734
Unrealized translation gain (loss) on foreign currency denominated intercompany loans	3,927				3,927
Unrealized loss on interest rate swaps	(441)				(441)
Net loss	$ (11,310)					(11,310)
Ending balance (in shares) at Sep. 30, 2020	29,460,588		29,460,588
Ending balance at Sep. 30, 2020	$ 288,244		$ 3	$ 504,425	$ (39,480)	$ (176,704)