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Note 6 - Carrying Amount of the Company's Outstanding Debt (Details) - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Senior Secured Debt, Due March 5, 2016 [Member]    
Senior secured debt [1] $ 39,910 $ 34,735
Senior Secured Debt, Due June 30, 2017 [Member]    
Senior secured debt [1] 11,905 10,986
Convertible Note Instrument, Due March 5, 2018 [Member]    
Convertible note instrument 4,018 $ 60,455
Convertible Note Instrument, Due March 5, 2020 [Member]    
Convertible note instrument 59,804
Other loans 193 $ 28
Debt discount, net of accumulated accretion (7,564) (1,809)
Net 108,266 104,395
Less current portion 48 11
Debt, non-current $ 108,218 $ 104,384
[1] As further discussed below, the Company extended the due date related to its senior secured debt from March 5, 2016 to September 28, 2017.