Consolidated Statements of Shareholders' Equity - USD ($) shares in Thousands, $ in Thousands	Common Stock [Member]	Treasury Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Total
Balances (in shares) at Dec. 31, 2020	6,472	(1,315)
Balances at Dec. 31, 2020	$ 65	$ (6,371)	$ 88,487	$ (65,756)	$ 81	$ 16,506
Share-based payment expense	0	0	61	0	0	61
Net income (loss) to common shareholders	0	0	0	4,518	0	4,518
Short swing profit disgorgement	0	0	32	0	0	32
Foreign currency translation	$ 0	$ 0	0	0	(104)	(104)
Balances (in shares) at Dec. 31, 2021	6,472	(1,315)
Balances at Dec. 31, 2021	$ 65	$ (6,371)	88,580	(61,238)	(23)	21,013
Share-based payment expense	0	0	190	0	0	190
Net income (loss) to common shareholders	0	0	0	3,529	0	3,529
Foreign currency translation	$ 0	$ 0	0	0	(521)	(521)
Balances (in shares) at Dec. 31, 2022	6,472	(1,315)
Balances at Dec. 31, 2022	$ 65	$ (6,371)	$ 88,770	$ (57,709)	$ (544)	$ 24,211