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Note 8 - Stockholders' Equity (Details Textual) - USD ($) $ / shares in Units, $ in Thousands |  | 6 Months Ended
--- | --- | ---
Jun. 12, 2020 | Sep. 30, 2020 | Sep. 30, 2019
Stock Issued During Period, Shares, New Issues (in shares) | 600,000 |  |
Sale of Stock, Underwriter Options, Shares (in shares) | 90,000 |  |
Shares Issued, Price Per Share (in dollars per share) | $ 225.00 |  |
Proceeds from Issuance of Common Stock | $ 145,935 | $ 0 | $ 167,070

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- Definition The number of shares that can be granted upon exercise of underwriter options. + References No definition available. + Details
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- Definition The cash inflow from the additional capital contribution to the entity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3255-108585 + Details
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