Condensed Statements of Stockholders' Equity (Unaudited) - USD ($) $ 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, Common [Member]	Total
Balance (in shares) at Dec. 31, 2021	30,264,000
Balance at Dec. 31, 2021	$ 312	$ 164,199	$ (114,549)	$ (1,604)	$ 76	$ (2,234)	$ 46,200
Net income (loss)	0	0	(998)	0	0	0	(998)
Foreign currency translation adjustments	0	0	0	(70)	0	0	(70)
Stock compensation expense	$ 0	18	0	0	0	0	18
Common shares issued upon vesting of restricted stock units (in shares)	45,000
Common shares issued upon vesting of restricted stock units	$ 1	(1)	0	0	0	0	0
Taxes paid on behalf of equity award participants (in shares)	(13,000)
Taxes paid on behalf of equity award participants	$ 0	0	0	0	0	(17)	(17)
Net loss	$ 0	0	(998)	0	0	0	(998)
Balance (in shares) at Mar. 31, 2022	30,296,000
Balance at Mar. 31, 2022	$ 313	164,216	(115,547)	(1,674)	76	(2,251)	45,133
Balance (in shares) at Dec. 31, 2021	30,264,000
Balance at Dec. 31, 2021	$ 312	164,199	(114,549)	(1,604)	76	(2,234)	46,200
Net income (loss)							(1,040)
Foreign currency translation adjustments							(447)
Net loss							(1,040)
Balance (in shares) at Sep. 30, 2022	30,296,000
Balance at Sep. 30, 2022	$ 313	164,334	(115,589)	(2,051)	76	(2,251)	44,832
Balance (in shares) at Mar. 31, 2022	30,296,000
Balance at Mar. 31, 2022	$ 313	164,216	(115,547)	(1,674)	76	(2,251)	45,133
Net income (loss)	0	0	(356)	0	0	0	(356)
Foreign currency translation adjustments	0	0	0	(222)	0	0	(222)
Stock compensation expense	0	28	0	0	0	0	28
Net loss	$ 0	0	(356)	0	0	0	(356)
Balance (in shares) at Jun. 30, 2022	30,296,000
Balance at Jun. 30, 2022	$ 313	164,244	(115,903)	(1,896)	76	(2,251)	44,583
Net income (loss)	0	0	314	0	0	0	314
Foreign currency translation adjustments	0	0	0	(155)	0	0	(155)
Stock compensation expense	0	90	0	0	0	0	90
Net loss	$ 0	0	314	0	0	0	314
Balance (in shares) at Sep. 30, 2022	30,296,000
Balance at Sep. 30, 2022	$ 313	164,334	(115,589)	(2,051)	76	(2,251)	44,832
Balance (in shares) at Dec. 31, 2022	30,296,000
Balance at Dec. 31, 2022	$ 313	164,422	(115,991)	(1,728)	76	(2,251)	44,841
Net income (loss)	0	0	(414)	0	0	0	(414)
Foreign currency translation adjustments	0	0	0	86	0	0	86
Stock compensation expense	0	89	0	0	0	0	89
Net loss	$ 0	0	(414)	0	0	0	(414)
Balance (in shares) at Mar. 31, 2023	30,296,000
Balance at Mar. 31, 2023	$ 313	164,511	(116,405)	(1,642)	76	(2,251)	44,602
Balance (in shares) at Dec. 31, 2022	30,296,000
Balance at Dec. 31, 2022	$ 313	164,422	(115,991)	(1,728)	76	(2,251)	44,841
Net income (loss)							(999)
Foreign currency translation adjustments							(84)
Net loss							$ (999)
Exercise of stock options (in shares)							44,000
Balance (in shares) at Sep. 30, 2023	30,385,000
Balance at Sep. 30, 2023	$ 313	164,752	(116,990)	(1,812)	76	(2,251)	$ 44,088
Balance (in shares) at Mar. 31, 2023	30,296,000
Balance at Mar. 31, 2023	$ 313	164,511	(116,405)	(1,642)	76	(2,251)	44,602
Net income (loss)	0	0	(1,044)	0	0	0	(1,044)
Foreign currency translation adjustments	0	0	0	(48)	0	0	(48)
Stock compensation expense	$ 0	98	0	0	0	0	98
Common shares issued upon vesting of restricted stock units (in shares)	45,000
Common shares issued upon vesting of restricted stock units	$ 0	0	0	0	0	0	0
Net loss	$ 0	0	(1,044)	0	0	0	(1,044)
Exercise of stock options (in shares)	44,000
Exercise of stock options	$ 0	42	0	0	0	0	42
Balance (in shares) at Jun. 30, 2023	30,385,000
Balance at Jun. 30, 2023	$ 313	164,651	(117,449)	(1,690)	76	(2,251)	43,650
Net income (loss)	0	0	459	0	0	0	459
Foreign currency translation adjustments	0	0	0	(122)	0	0	(122)
Stock compensation expense	0	101	0	0	0	0	101
Net loss	$ 0	0	459	0	0	0	459
Balance (in shares) at Sep. 30, 2023	30,385,000
Balance at Sep. 30, 2023	$ 313	$ 164,752	$ (116,990)	$ (1,812)	$ 76	$ (2,251)	$ 44,088