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Note 7 - Commitments and Contingencies | 9 Months Ended
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Sep. 30, 2021
Notes to Financial Statements |
Commitments and Contingencies Disclosure [Text Block] | 7. COMMITMENTS AND CONTINGENCIES The SEC conducted a non-public investigation since August 2016 to determine whether there had been violations of the federal securities laws relating to the trading of the Company’s securities and/or its public disclosures. On September 30, 2021, the Company was notified by the SEC that it had concluded its investigation and does not intend to recommend an enforcement action.

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