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, Common [Member]	Total
Balance (in shares) at Dec. 31, 2022	30,296
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
Balance at Mar. 31, 2023	$ 313	164,511	(116,405)	(1,642)	76	(2,251)	44,602
Balance (in shares) at Dec. 31, 2023	30,385
Balance at Dec. 31, 2023	$ 313	164,853	(117,529)	(1,748)	76	(2,251)	43,714
Net income (loss)	0	0	281	0	0	0	281
Foreign currency translation adjustments	0	0	0	(143)	0	0	(143)
Stock compensation expense	$ 0	104	0	0	0	0	104
Balance (in shares) at Mar. 31, 2024	30,385
Balance at Mar. 31, 2024	$ 313	$ 164,957	$ (117,248)	$ (1,891)	$ 76	$ (2,251)	$ 43,956