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)
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)							(1,354)
Foreign currency translation adjustments							(292)
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
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
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
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
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)							(1,458)
Foreign currency translation adjustments							$ 38
Exercise of stock options (in shares)							44,000
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
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
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