Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Income tax credit at statutory rates	$ 208	$ (631)
Nondeductible expenses	5	3
State income tax, net of federal benefits	74	(226)
Expiration of NOL & Credits	2,543	1,530
Tax basis in excess of book Convertible Debt		342
Expiration of Stock Options	122	125
Other	(7)
Change in valuation allowance	(2,945)	$ (1,143)
Total