Note 7 - Income Taxes (Details Textual) - USD ($)	3 Months Ended		6 Months Ended	9 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2020	Jun. 30, 2019
Income Tax Expense (Benefit), Total	$ 4,320,000	$ 1,620,000		$ (11,260,000)	$ (4,980,000)
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest, Total				(39,102,000)	$ (17,672,000)
Income Tax Reconciliation, Tax Credit, CARES Act				187,000
Effective Income Tax Rate Reconciliation, Tax Credit, Investment, Amount				$ 11,166,000
Effective Income Tax Rate Reconciliation, Percent, Total				29.00%	28.00%
Domestic Tax Authority [Member]
Open Tax Year			2016 2017 2018 2019
State and Local Jurisdiction [Member]
Open Tax Year			2015 2016 2017 2018 2019