Consolidated Statements of Operations - USD ($) shares in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Operating Expenses
General and administrative expenses	$ (1,133,000)	$ (1,005,000)
Total operating expenses	(1,133,000)	(1,005,000)
Interest income	1,039,000	943,000
Dividend income	157,000
Product financing interest income		125,000
Gain on sale of closely held stock	120,000
Gain on extinguishment of subordinated note receivable		448,000
Loss from affiliate	(430,000)
Income from Continued Dumping and Subsidy Offset Act, net	1,230,000	26,000
Impairment loss	(897,000)	(168,000)
Income from continuing operations before income taxes	86,000	369,000
Income tax benefit	84,000	1,202,000
Income from continuing operations	170,000	1,571,000
Discontinued operations
Loss from discontinued operations (including loss on sale of assets of $865)		(3,011,000)
Net income (loss)	$ 170,000	$ (1,440,000)
Basic and diluted income (loss) per share:
Income (loss) from continuing operations (in dollars per share)	$ 0.01	$ 0.11
Loss from discontinued operations (in dollars per share)		(0.21)
Net income (loss) (in dollars per share)	$ 0.01	$ (0.10)
Weighted average shares outstanding:
Basic (in shares)	14,507	14,531
Diluted (in shares)	14,937	14,574