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Note 1 - Organization and Summary of Significant Accounting Policies - Accounts Receivable (Details) - USD ($)	Jun. 30, 2021	Dec. 31, 2020
Accounts receivable	$ 291,435	$ 294,199
Billed Revenues [Member]
Accounts receivable	240,267	130,532
Unbilled Revenues [Member]
Accounts receivable	$ 51,168	$ 163,667

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- Definition

Amount, after allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business, classified as current.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 45
-Paragraph 2
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
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-Section S99
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-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

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