Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Cumulative Effect, Period of Adoption, Adjustment [Member] Retained Earnings [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Nil Coupon Perpetual Loan Notes [Member]	Treasury Stock [Member]	Total
Balance (in shares) at Dec. 31, 2018			24,170,000
Balance at Dec. 31, 2018			$ 248	$ 138,992	$ (102,495)	$ (1,285)	$ 76	$ (1,484)	$ 34,052
Net loss					(7,852)				(7,852)
Foreign currency translation adjustments						(493)			(493)
Stock compensation expense				574					574
Common shares issued upon vesting of restricted stock units (in shares)			563,000
Common shares issued upon vesting of restricted stock units			$ 6	(6)
Treasury shares withheld (in shares)			(141,000)						(140,784)
Treasury shares withheld								(128)	$ (128)
Balance at Dec. 31, 2019	$ 22	$ 22	$ 254	139,560	(110,325)	(1,778)	76	(1,612)	$ 26,175
Exercise of stock Options (in shares)
Exercise of stock Options									$ 0
Balance (in shares) at Dec. 31, 2019			24,592,000
Net loss					(4,278)				(4,278)
Foreign currency translation adjustments						408			408
Stock compensation expense				290					290
Common shares issued upon vesting of restricted stock units (in shares)			606,000
Common shares issued upon vesting of restricted stock units			$ 6	(6)
Treasury shares withheld (in shares)			(152,000)						(152,257)
Treasury shares withheld								(570)	$ (570)
Balance at Dec. 31, 2020			$ 262	140,138	$ (114,603)	$ (1,370)	$ 76	$ (2,182)	$ 22,321
Exercise of stock Options (in shares)			183,000						183,000
Exercise of stock Options			$ 2	$ 294					$ 296
Balance (in shares) at Dec. 31, 2020			25,229,000