Note 4 - Debt - Components of Debt, Interest Expense and Effective Interest Rate (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2019	Mar. 31, 2018
Interest Expense		$ 3,657	$ 2,673
The 2017 Senior Credit Facility [Member]
Interest Expense		$ 508	$ 173
Effective Interest Rate		6.70%	6.30%
Convertible Second Lien Notes [Member]
Interest Expense	[1]	$ 3,149	$ 2,500
Effective Interest Rate	[1]	24.30%	24.60%

[1] Interest expense for the three months ended March 31, 2019 included $1.3 million of debt discount amortization and $1.8 million of paid in-kind interest, and interest expense for the three months ended March 31, 2018 included $0.9 million of debt discount amortization and $1.6 million of paid in-kind interest.