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Note 9 - Income Taxes Income Tax (Details) | Mar. 31, 2019 USD ($)
--- | ---
Operating Loss Carryforwards [Line Items] |
Operating Loss Carryforwards | $ 2,100,000
Deferred Tax Assets, Operating Loss Carryforwards, State and Local, Net of Federal Benefit | 67,700,000
US Treasury Securities |
Operating Loss Carryforwards [Line Items] |
Debt Securities | 0
State and Local NOL Carryforwards |
Operating Loss Carryforwards [Line Items] |
Valuation Allowance, Amount | $ 64,400,000

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- Definition Amount of investment in debt security measured at amortized cost (held-to-maturity), investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale) and investment in debt security measured at fair value with change in fair value recognized in net income (trading). + References No definition available. + Details
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