A reconciliation of income tax expense to the amount computed by applying the Federal income tax rate to loss before provision for income taxes as of December 31, 2022 and 2021 is as follows: (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Income Tax Disclosure [Abstract]
Income tax credit at statutory rates	$ (551)	$ 495
Tax exempt income - PPP loan		(271)
Permanent tax deduction stock options exercised	(273)	(63)
State income tax, net of federal benefits	(124)	177
Expiration of NOL & credits	1,149	899
Effect of change in deferred tax rate	69
Expiration of stock options	75	92
Other	(15)	2
Change in valuation allowance	(347)	(1,294)
TOTAL	$ (17)	$ 37