Note 9 - Income Taxes Income Tax (Details)	Mar. 31, 2017 USD ($)
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	$ 561,000,000
Deferred Tax Assets, Tax Credit Carryforwards, Foreign	0
Deferred Tax Assets, Tax Credit Carryforwards, Alternative Minimum Tax	8,400,000
State and Local NOL Carryforwards [Member]
Operating Loss Carryforwards [Line Items]
Valuation Allowance, Amount	$ 49,300,000