Condensed Consolidated Statement of Shareholders’ Equity - USD ($) $ in Thousands	Total	Common Shares	Treasury Shares	Additional Paid-In Capital	Accumulated Deficit	Accumulated Other Comprehensive Income	IPO	IPO Common Shares
Beginning balance (in shares) at Dec. 31, 2018		20,672,025	408,070
Beginning balance at Dec. 31, 2018	$ 69,485	$ 145,709	$ (2,854)	$ 15,156	$ (88,975)	$ 449
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of shares in an asset acquisition (in shares)		12,404
Issuance of shares in an asset acquisition	337	$ 337
Stock option exercises (in shares)		5,941
Stock option exercises	84	$ 84
Warrant exercises (in shares)		70,567
Warrant exercises	56	$ 113		(57)
Share-based compensation (in shares)		45,394
Share-based compensation	1,836	$ 45		1,791
Shares withheld to cover income tax obligation upon vesting of restricted stock (in shares)		(2,528)
Shares withheld to cover income tax obligation upon vesting of restricted stock	(56)	$ (3)		(53)
Foreign currency translation gain	67					67
Net loss	(10,779)				(10,779)
Ending balance (in shares) at Mar. 31, 2019		20,803,803	408,070
Ending balance at Mar. 31, 2019	61,030	$ 146,285	$ (2,854)	16,837	(99,754)	516
Beginning balance (in shares) at Dec. 31, 2018		20,672,025	408,070
Beginning balance at Dec. 31, 2018	69,485	$ 145,709	$ (2,854)	15,156	(88,975)	449
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock	630
Foreign currency translation gain	572
Net loss	(32,594)
Ending balance (in shares) at Sep. 30, 2019		20,983,139	408,070
Ending balance at Sep. 30, 2019	43,804	$ 147,208	$ (2,854)	19,998	(121,569)	1,021
Beginning balance (in shares) at Mar. 31, 2019		20,803,803	408,070
Beginning balance at Mar. 31, 2019	61,030	$ 146,285	$ (2,854)	16,837	(99,754)	516
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock option exercises (in shares)		22,289
Stock option exercises	92	$ 92
Warrant exercises (in shares)		16,754
Warrant exercises	0	$ 16		(16)
Share-based compensation (in shares)		41,024
Share-based compensation	1,894	$ 41		1,853
Shares withheld to cover income tax obligation upon vesting of restricted stock (in shares)		(1,451)
Shares withheld to cover income tax obligation upon vesting of restricted stock	(35)	$ (1)		(34)
Foreign currency translation gain	(154)					(154)
Net loss	(9,040)				(9,040)
Ending balance (in shares) at Jun. 30, 2019		20,882,419	408,070
Ending balance at Jun. 30, 2019	53,787	$ 146,433	$ (2,854)	18,640	(108,794)	362
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock (in shares)		33,333
Issuance of common stock	630	$ 630
Stock option exercises (in shares)		24,820
Stock option exercises	102	$ 102
Share-based compensation (in shares)		44,547
Share-based compensation	1,444	$ 45		1,399
Shares withheld to cover income tax obligation upon vesting of restricted stock (in shares)		(1,980)
Shares withheld to cover income tax obligation upon vesting of restricted stock	(43)	$ (2)		(41)
Foreign currency translation gain	659					659
Net loss	(12,775)				(12,775)
Ending balance (in shares) at Sep. 30, 2019		20,983,139	408,070
Ending balance at Sep. 30, 2019	43,804	$ 147,208	$ (2,854)	19,998	(121,569)	1,021
Beginning balance (in shares) at Dec. 31, 2019		21,057,040	408,070
Beginning balance at Dec. 31, 2019	39,614	$ 147,688	$ (2,854)	21,214	(127,125)	691
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock (in shares)								2,628,571
Issuance of common stock							$ 63,855	$ 63,855
Stock option exercises (in shares)		39,723
Stock option exercises	181	$ 181
Share-based compensation (in shares)		11,062
Share-based compensation	1,629	$ 11		1,618
Shares withheld to cover income tax obligation upon vesting of restricted stock (in shares)		(1,383)
Shares withheld to cover income tax obligation upon vesting of restricted stock	(34)	$ (1)		(33)
Foreign currency translation gain	2,821					2,821
Net loss	(17,759)				(17,759)
Ending balance (in shares) at Mar. 31, 2020		23,735,013	408,070
Ending balance at Mar. 31, 2020	90,307	$ 211,734	$ (2,854)	22,799	(144,884)	3,512
Beginning balance (in shares) at Dec. 31, 2019		21,057,040	408,070
Beginning balance at Dec. 31, 2019	39,614	$ 147,688	$ (2,854)	21,214	(127,125)	691
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock	$ 618
Stock option exercises (in shares)	83,652
Foreign currency translation gain	$ 3,312
Net loss	(32,477)
Ending balance (in shares) at Sep. 30, 2020		23,827,680	408,070
Ending balance at Sep. 30, 2020	79,957	$ 212,752	$ (2,854)	25,658	(159,602)	4,003
Beginning balance (in shares) at Mar. 31, 2020		23,735,013	408,070
Beginning balance at Mar. 31, 2020	90,307	$ 211,734	$ (2,854)	22,799	(144,884)	3,512
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock option exercises (in shares)		22,734
Stock option exercises	193	$ 193
Share-based compensation (in shares)		5,802
Share-based compensation	1,557	$ 6		1,551
Shares withheld to cover income tax obligation upon vesting of restricted stock (in shares)		(762)
Shares withheld to cover income tax obligation upon vesting of restricted stock	(13)	$ (1)		(12)
Foreign currency translation gain	213					213
Net loss	(10,471)				(10,471)
Ending balance (in shares) at Jun. 30, 2020		23,762,787	408,070
Ending balance at Jun. 30, 2020	81,786	$ 211,932	$ (2,854)	24,338	(155,355)	3,725
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock (in shares)		33,334
Issuance of common stock	618	$ 618
Stock option exercises (in shares)		21,195
Stock option exercises	192	$ 192
Share-based compensation (in shares)		11,302
Share-based compensation	1,348	$ 11		1,337
Shares withheld to cover income tax obligation upon vesting of restricted stock (in shares)		(938)
Shares withheld to cover income tax obligation upon vesting of restricted stock	(18)	$ (1)		(17)
Foreign currency translation gain	278					278
Net loss	(4,247)				(4,247)
Ending balance (in shares) at Sep. 30, 2020		23,827,680	408,070
Ending balance at Sep. 30, 2020	$ 79,957	$ 212,752	$ (2,854)	$ 25,658	$ (159,602)	$ 4,003