Note L - Income Taxes - Deferred Tax Assets (Details) - USD ($)	Dec. 31, 2019	Dec. 31, 2018
Allowance for doubtful accounts	$ 2,000	$ 3,000
Warranty reserve	5,000	29,000
Impaired Assets		435,000
Inventory Reserve	178,000	551,000
Deferred officers' compensation	820,000	715,000
Depreciation and Amortization	(103,000)	345,000
Net operating loss carryforward	16,504,000	16,500,000
Tax Credit	384,000
Other	(28,000)
Subtotal	17,762,000	18,578,000
Valuation allowance	(17,762,000)	(18,578,000)
Non-current deferred tax asset