Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	Common stock	Additional Paid-In Capital	Treasury Stock	Accumulated Deficit	Accumulated Other Comprehensive Income (Loss)
Balance at Dec. 31, 2018	$ 228,956	$ 4	$ 372,316	$ (2,406)	$ (147,954)	$ 6,996
Balance (in shares) at Dec. 31, 2018		42,288,870
Share-based compensation	910		910
Share based compensation (in shares)		52,150
Foreign exchange translation	810					810
Net loss	(13,491)				(13,491)
Balance at Mar. 31, 2019	217,185	$ 4	373,226	(2,406)	(161,445)	7,806
Balance (in shares) at Mar. 31, 2019		42,341,020
Balance at Dec. 31, 2018	228,956	$ 4	372,316	(2,406)	(147,954)	6,996
Balance (in shares) at Dec. 31, 2018		42,288,870
Net loss	(36,199)
Balance at Sep. 30, 2019	194,019	$ 4	375,871	(2,406)	(184,153)	4,703
Balance (in shares) at Sep. 30, 2019		42,399,554
Balance at Mar. 31, 2019	217,185	$ 4	373,226	(2,406)	(161,445)	7,806
Balance (in shares) at Mar. 31, 2019		42,341,020
Issuance of common stock	414		414
Issuance of common stock (in shares)		58,534
Share-based compensation	579		579
Foreign exchange translation	(855)					(855)
Net loss	(11,448)				(11,448)
Balance at Jun. 30, 2019	205,875	$ 4	374,219	(2,406)	(172,893)	6,951
Balance (in shares) at Jun. 30, 2019		42,399,554
Issuance of common stock	1,241		1,241
Share-based compensation	411		411
Foreign exchange translation	(2,248)					(2,248)
Net loss	(11,260)				(11,260)
Balance at Sep. 30, 2019	194,019	$ 4	375,871	$ (2,406)	(184,153)	4,703
Balance (in shares) at Sep. 30, 2019		42,399,554
Balance at Dec. 31, 2019	183,765	$ 4	381,952		(205,498)	7,307
Balance (in shares) at Dec. 31, 2019		42,529,017
Share-based compensation	825		825
Foreign exchange translation	(4,428)					(4,428)
Net loss	(12,526)				(12,526)
Balance at Mar. 31, 2020	167,636	$ 4	382,777		(218,024)	2,879
Balance (in shares) at Mar. 31, 2020		42,529,017
Balance at Dec. 31, 2019	183,765	$ 4	381,952		(205,498)	7,307
Balance (in shares) at Dec. 31, 2019		42,529,017
Net loss	(40,151)
Balance at Sep. 30, 2020	146,713	$ 4	384,504		(245,649)	7,854
Balance (in shares) at Sep. 30, 2020		42,529,017
Balance at Mar. 31, 2020	167,636	$ 4	382,777		(218,024)	2,879
Balance (in shares) at Mar. 31, 2020		42,529,017
Share-based compensation	814		814
Foreign exchange translation	2,733					2,733
Net loss	(14,918)				(14,918)
Balance at Jun. 30, 2020	156,265	$ 4	383,591		(232,942)	5,612
Balance (in shares) at Jun. 30, 2020		42,529,017
Share-based compensation	913		913
Foreign exchange translation	2,242					2,242
Net loss	(12,707)				(12,707)
Balance at Sep. 30, 2020	$ 146,713	$ 4	$ 384,504		$ (245,649)	$ 7,854
Balance (in shares) at Sep. 30, 2020		42,529,017