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Note F - Common Stock and Warrants - Reserved Authorized Shares of Common Stock for Future Issuance (Details) - shares | Sep. 30, 2022 | Dec. 31, 2021
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Common shares reserved for future issuance (in shares) | 12,575,728 | 11,236,414
Warrant [Member] |  |
Common shares reserved for future issuance (in shares) | 4,252,600 | 4,252,600
Share-Based Payment Arrangement [Member] |  |
Common shares reserved for future issuance (in shares) | 2,463,509 | 1,273,879
Possible Future Issuances Under Equity Incentive Plans [Member] |  |
Common shares reserved for future issuance (in shares) | 4,414,406 | 4,209,935
Possible Future Issuances Under Employee Stock Purchase Plans [Member] |  |
Common shares reserved for future issuance (in shares) | 1,445,213 | 1,500,000

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- Definition Aggregate number of common shares reserved for future issuance. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.29) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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