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Note A - The Company and Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2020

Notes Tables

Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]

		December 31,
		2020				2019
Accounts receivable - current		$	561,834			$	139,785
Accounts receivable - non current			1,720,000				1,720,000
			2,281,834				1,859,785
Allowance for doubtful accounts - current			(13,785	)			(13,785	)
Allowance for doubtful accounts - non current			(1,720,000	)			(1,720,000	)
			(1,733,785	)			(1,733,785	)
Accounts receivable, net of allowances for doubtful accounts		$	548,049			$	126,000

Summary of Valuation Allowance [Table Text Block]

		Balance at Beginning of Year				Charged to Costs and Expenses				Deductions From Reserves				Balance at End of Year
Year Ended December 31, 2020
Allowance for Doubtful Accounts		$	1,733,785			$	-			$	-			$	1,733,785
Year Ended December 31, 2019
Allowance for Doubtful Accounts		$	1,733,785			$	-			$	-			$	1,733,785

Useful Lives of Property Plan and Equipment [Table Text Block]

		Years
Equipment and leasehold improvements
Equipment (years)		3	-	5
Furniture and fixtures (years)		3	-	5
Software (years)			3
Leasehold improvements		life or lease term

Share-based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block]

		Year ended December 31,
		2020				2019
Selling, general and administrative		$	705,971			$	828,981
Research, development and engineering			86,124				118,739
		$	792,095			$	947,720

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

		Year ended December 31,
		2020				2019
Weighted average Risk free interest rate			0.30	%			2.33	%
Expected life of options (in years)			4.50				4.50
Expected dividends			0	%			0	%
Weighted average Volatility of stock price			115	%			84	%

X

- Definition

Tabular disclosure of the periods of time over which an entity anticipates to receive utility from its property, plant and equipment (that is, the periods of time over which an entity allocates the initial cost of its property, plant and equipment).

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Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions.

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