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Note 9 - Income Taxes Income Tax (Details) $ in Millions | Sep. 30, 2017 USD ($)
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Operating Loss Carryforwards [Line Items] |
Operating Loss Carryforwards | $ 297.4
Deferred Tax Assets, Tax Credit Carryforwards, Research | 6.4
Deferred Tax Assets, Tax Credit Carryforwards, Alternative Minimum Tax | 36.2
State and Local NOL Carryforwards [Member] |
Operating Loss Carryforwards [Line Items] |
Valuation Allowance, Amount | $ 64.1

X
- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible alternative minimum tax credit carryforwards. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32559-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32632-109319 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32621-109319 + Details
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