Consolidated Statements of Stockholders' Equity - 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
Balance at Dec. 31, 2021	$ 312	$ 164,199	$ (114,549)	$ (1,604)	$ 76	$ (2,234)	$ 46,200
Net income (loss)	0	0	(1,442)	0	0	0	(1,442)
Foreign currency translation adjustments	0	0	0	(124)	0	0	(124)
Stock compensation expense	$ 0	224	0	0	0	0	224
Common stock issued upon vesting of restricted stock units (in shares)	45
Common stock issued upon vesting of restricted stock units	$ 1	(1)	0	0	0	0	$ 0
Treasury shares withheld (in shares)	(13)						12,497
Treasury shares withheld	$ 0	0	0	0	0	(17)	$ (17)
Exercise of stock options (in shares)							(0)
Exercise of stock options							$ 0
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	(1,538)	0	0	0	(1,538)
Foreign currency translation adjustments	0	0	0	(20)	0	0	(20)
Stock compensation expense	$ 0	389	0	0	0	0	389
Common stock issued upon vesting of restricted stock units (in shares)	45
Common stock issued upon vesting of restricted stock units	$ 0	0	0	0	0	0	$ 0
Treasury shares withheld (in shares)							0
Treasury shares withheld							$ 0
Exercise of stock options (in shares)	44						44,000
Exercise of stock options	$ 0	42	0	0	0	0	$ 42
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