Note 1 - Description of Business and Summary of Significant Accounting Policies (Details Textual) - USD ($) $ in Thousands	6 Months Ended		12 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015	Feb. 08, 2016
Senior Secured Debt [Member]
Percentage of Future Quarterly Interest Payments				50.00%
Debt Issuance Cost Reclassification from Other Long-term Assets to Long-term Debt [Member] | Six Month Ended June 30, 2016 [Member]
Prior Period Reclassification Adjustment	$ 607,000
Debt Issuance Cost Reclassification from Other Long-term Assets to Long-term Debt [Member] | Year Ended December 31, 2015 [Member]
Prior Period Reclassification Adjustment			$ 626
Net Income (Loss) Attributable to Parent	(14,440)	$ (10,832)
Working Capital	4,700
Net Cash Provided by (Used in) Operating Activities	$ (4,821)	$ (5,348)