Consolidated Statements of Stockholders’ Equity - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Accumulated Deficit	Total accumulated other comprehensive loss	Nil Coupon Perpetual Loan Notes	Treasury Stock	Cumulative Effect, Period of Adoption, Adjustment	Cumulative Effect, Period of Adoption, Adjustment Accumulated Deficit
Balance (in shares) at Dec. 31, 2018		24,170
Balance at beginning of period at Dec. 31, 2018	$ 34,052	$ 248	$ 138,992	$ (102,495)	$ (1,285)	$ 76	$ (1,484)	$ 22	$ 22
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(1,289)			(1,289)
Foreign currency translation adjustments	104				104
Stock compensation expense	96		96
Common shares issued upon vesting of restricted stock units (in shares)		18
Treasury shares withheld (in shares)		(2)
Treasury shares withheld	(2)						(2)
Balance (in shares) at Mar. 31, 2019		24,186
Balance at end of period at Mar. 31, 2019	32,983	$ 248	139,088	(103,762)	(1,181)	76	(1,486)
Balance (in shares) at Dec. 31, 2018		24,170
Balance at beginning of period at Dec. 31, 2018	34,052	$ 248	138,992	(102,495)	(1,285)	76	(1,484)	$ 22	$ 22
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(2,234)
Foreign currency translation adjustments	61
Balance (in shares) at Jun. 30, 2019		24,186
Balance at end of period at Jun. 30, 2019	32,118	$ 248	139,211	(104,707)	(1,224)	76	(1,486)
Balance (in shares) at Mar. 31, 2019		24,186
Balance at beginning of period at Mar. 31, 2019	32,983	$ 248	139,088	(103,762)	(1,181)	76	(1,486)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(945)			(945)
Foreign currency translation adjustments	(43)				(43)
Stock compensation expense	123		123
Balance (in shares) at Jun. 30, 2019		24,186
Balance at end of period at Jun. 30, 2019	32,118	$ 248	139,211	(104,707)	(1,224)	76	(1,486)
Balance (in shares) at Dec. 31, 2019		24,592
Balance at beginning of period at Dec. 31, 2019	26,175	$ 254	139,560	(110,325)	(1,778)	76	(1,612)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(2,567)			(2,567)
Foreign currency translation adjustments	(231)				(231)
Stock compensation expense	81		81
Common shares issued upon vesting of restricted stock units (in shares)		55
Treasury shares withheld (in shares)		(11)
Treasury shares withheld	(5)						(5)
Balance (in shares) at Mar. 31, 2020		24,636
Balance at end of period at Mar. 31, 2020	23,453	$ 254	139,641	(112,892)	(2,009)	76	(1,617)
Balance (in shares) at Dec. 31, 2019		24,592
Balance at beginning of period at Dec. 31, 2019	26,175	$ 254	139,560	(110,325)	(1,778)	76	(1,612)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(5,111)
Foreign currency translation adjustments	(79)
Balance (in shares) at Jun. 30, 2020		24,701
Balance at end of period at Jun. 30, 2020	21,130	$ 255	139,710	(115,436)	(1,857)	76	(1,618)
Balance (in shares) at Mar. 31, 2020		24,636
Balance at beginning of period at Mar. 31, 2020	23,453	$ 254	139,641	(112,892)	(2,009)	76	(1,617)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(2,544)			(2,544)
Foreign currency translation adjustments	152				152
Stock compensation expense	69		69
Common shares issued upon vesting of restricted stock units (in shares)		66
Common shares issued upon vesting of restricted stock units		$ 1					(1)
Treasury shares withheld (in shares)		(1)
Balance (in shares) at Jun. 30, 2020		24,701
Balance at end of period at Jun. 30, 2020	$ 21,130	$ 255	$ 139,710	$ (115,436)	$ (1,857)	$ 76	$ (1,618)