Note 14 - Income Taxes (Details Textual) - USD ($) $ in Thousands, shares in Millions	3 Months Ended	12 Months Ended
	Feb. 28, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Deferred Tax Assets, Gross, Current			$ 1,100
Unrecognized Tax Benefits		$ 1,117	1,117	$ 1,117
Unrecognized Tax Benefits that Would Impact Effective Tax Rate		1,100	1,100
Income Tax Examination, Penalties and Interest Expense		200	200
Income Tax Examination, Penalties and Interest Accrued		2,600	2,400
Deferred Tax Assets, Net of Valuation Allowance, Current		0
Subsequent Event [Member]
Stock Issued During Period, Shares, New Issues	3.1
Domestic Tax Authority [Member]
Operating Loss Carryforwards		147,700
Domestic Tax Authority [Member] | Tax Year 2012 [Member]
Open Tax Year				2012
Domestic Tax Authority [Member] | Tax Year 2011 [Member]
Open Tax Year				2011
State and Local Jurisdiction [Member]
Operating Loss Carryforwards		$ 105,000