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Note 1 - Basis of Presentation (Details Textual) - USD ($)	3 Months Ended		6 Months Ended	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Dec. 31, 2020
Contract with Customer, Liability, Current	$ 44,118		$ 44,118	$ 66,572
Accounts Receivable, Allowance for Credit Loss, Current	260,712		260,712	205,522
Capitalized Computer Software, Additions	388,349	$ 313,983
Asset Impairment Charges, Total			0	0
SEC Schedule, 12-09, Valuation Allowances and Reserves, Amount, Ending Balance	$ 575,149		$ 575,149	$ 515,199

X

- Definition

Amount of allowance for credit loss on accounts receivable, classified as current.

+ References

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-SubTopic 10
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Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

+ References

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Additions made to capitalized computer software costs during the period.

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