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Note 1 - Significant Accounting Policies 1 (Details Textual) - USD ($)	3 Months Ended	12 Months Ended
	Mar. 31, 2020	Dec. 31, 2019
Accounts Receivable, Allowance for Credit Loss, Ending Balance	$ 8,000	$ 8,000
Customer Concentration Risk [Member] | Accounts Receivable [Member] | US-based IT OEM Company [Member]
Concentration Risk, Percentage	64.00%	96.00%

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- Definition

Amount of allowance for credit loss on accounts receivable.

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For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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