Condensed Statements of Stockholders' Equity (Unaudited) - USD ($) shares in Thousands, $ in Thousands	Common Stock Outstanding [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Nil Coupon Perpetual Loan Notes [Member]	Treasury Stock [Member]	Total
Beginning balance (in shares) at Dec. 31, 2019	24,592
Beginning balance at Dec. 31, 2019	$ 254	$ 139,560	$ (110,325)	$ (1,778)	$ 76	$ (1,612)	$ 26,175
Net loss	0	0	(2,567)	0	0	0	(2,567)
Foreign currency translation adjustments	0	0	0	(231)	0	0	(231)
Stock compensation expense	$ 0	81	0	0	0	0	81
Common shares issued upon vesting of restricted stock units (in shares)	55
Common shares issued upon vesting of restricted stock units	$ 0	0	0	0	0	0	0
Treasury shares withheld (in shares)	(11)
Treasury shares withheld	$ 0	0	0	0	0	(5)	(5)
Net income (loss)	0	0	(2,567)	0	0	0	(2,567)
Foreign currency translation adjustments	$ 0	0	0	(231)	0	0	(231)
Ending balance (in shares) at Mar. 31, 2020	24,636
Ending balance at Mar. 31, 2020	$ 254	139,641	(112,892)	(2,009)	76	(1,617)	23,453
Beginning balance (in shares) at Dec. 31, 2019	24,592
Beginning balance at Dec. 31, 2019	$ 254	139,560	(110,325)	(1,778)	76	(1,612)	26,175
Net loss							(2,735)
Foreign currency translation adjustments							189
Net income (loss)							(2,735)
Foreign currency translation adjustments							189
Ending balance (in shares) at Sep. 30, 2020	24,701
Ending balance at Sep. 30, 2020	$ 255	139,767	(113,060)	(1,589)	76	(1,618)	23,831
Beginning balance (in shares) at Mar. 31, 2020	24,636
Beginning balance at Mar. 31, 2020	$ 254	139,641	(112,892)	(2,009)	76	(1,617)	23,453
Net loss	0	0	(2,544)	0	0	0	(2,544)
Foreign currency translation adjustments	0	0	0	152	0	0	152
Stock compensation expense	$ 0	69	0	0	0	0	69
Common shares issued upon vesting of restricted stock units (in shares)	66
Common shares issued upon vesting of restricted stock units	$ 1	0	0	0	0	(1)	0
Treasury shares withheld (in shares)	(1)
Treasury shares withheld	$ 0	0	0	0	0	0	0
Net income (loss)	0	0	(2,544)	0	0	0	(2,544)
Foreign currency translation adjustments	$ 0	0	0	152	0	0	152
Ending balance (in shares) at Jun. 30, 2020	24,701
Ending balance at Jun. 30, 2020	$ 255	139,710	(115,436)	(1,857)	76	(1,618)	21,130
Net loss	0	0	2,376	0	0	0	2,376
Foreign currency translation adjustments	0	0	0	268	0	0	268
Stock compensation expense	0	57	0	0	0	0	57
Net income (loss)	0	0	2,376	0	0	0	2,376
Foreign currency translation adjustments	$ 0	0	0	268	0	0	268
Ending balance (in shares) at Sep. 30, 2020	24,701
Ending balance at Sep. 30, 2020	$ 255	139,767	(113,060)	(1,589)	76	(1,618)	23,831
Beginning balance (in shares) at Dec. 31, 2020	25,229
Beginning balance at Dec. 31, 2020	$ 262	140,138	(114,603)	(1,370)	76	(2,182)	22,321
Net loss	0	0	398	0	0	0	398
Foreign currency translation adjustments	0	0	0	(193)	0	0	(193)
Stock compensation expense	$ 0	20	0	0	0	0	20
Common shares issued upon vesting of restricted stock units (in shares)	50
Common shares issued upon vesting of restricted stock units	$ 0	0	0	0	0	0	0
Treasury shares withheld (in shares)	(15)
Treasury shares withheld	$ 0	0	0	0	0	(52)	(52)
Net income (loss)	0	0	398	0	0	0	398
Foreign currency translation adjustments	$ 0	0	0	(193)	0	0	(193)
Common stock issued in connection with private placement, net (in shares)	5,000
Common stock issued in connection with private placement, net	$ 50	23,979	0	0	0	0	24,029
Ending balance (in shares) at Mar. 31, 2021	30,264
Ending balance at Mar. 31, 2021	$ 312	164,137	(114,205)	(1,563)	76	(2,234)	46,523
Beginning balance (in shares) at Dec. 31, 2020	25,229
Beginning balance at Dec. 31, 2020	$ 262	140,138	(114,603)	(1,370)	76	(2,182)	22,321
Net loss							298
Foreign currency translation adjustments							(213)
Net income (loss)							298
Foreign currency translation adjustments							(213)
Ending balance (in shares) at Sep. 30, 2021	30,264
Ending balance at Sep. 30, 2021	$ 312	164,178	(114,305)	(1,583)	76	(2,234)	46,444
Beginning balance (in shares) at Mar. 31, 2021	30,264
Beginning balance at Mar. 31, 2021	$ 312	164,137	(114,205)	(1,563)	76	(2,234)	46,523
Net loss	0	0	(778)	0	0	0	(778)
Foreign currency translation adjustments	0	0	0	133	0	0	133
Stock compensation expense	0	20	0	0	0	0	20
Net income (loss)	0	0	(778)	0	0	0	(778)
Foreign currency translation adjustments	$ 0	0	0	133	0	0	133
Ending balance (in shares) at Jun. 30, 2021	30,264
Ending balance at Jun. 30, 2021	$ 312	164,157	(114,983)	(1,430)	76	(2,234)	45,898
Net loss	0	0	678	0	0	0	678
Foreign currency translation adjustments	0	0	0	(153)	0	0	(153)
Stock compensation expense	0	21	0	0	0	0	21
Net income (loss)	0	0	678	0	0	0	678
Foreign currency translation adjustments	$ 0	0	0	(153)	0	0	(153)
Ending balance (in shares) at Sep. 30, 2021	30,264
Ending balance at Sep. 30, 2021	$ 312	$ 164,178	$ (114,305)	$ (1,583)	$ 76	$ (2,234)	$ 46,444