XML 64 R52.htm IDEA: XBRL DOCUMENT v3.19.1
Note 9 - Debt (Details Textual) - USD ($)
1 Months Ended 12 Months Ended
Apr. 19, 2017
Jan. 31, 2018
Jul. 31, 2012
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Jun. 30, 2017
Debt Instrument, Convertible, Conversion Price       $ 14.72 $ 14.72    
Amortization of Debt Issuance Costs and Discounts, Total       $ 1,706,000 $ 962,000 $ 3,977,000  
Interest Expense, Debt, Total       3,237,000 2,951,000 7,837,000  
Convertible 2020 Notes [Member]              
Debt Instrument, Interest Rate, Stated Percentage 12.00%           12.00%
Debt Instrument, Interest Rate, Paid In Kind Percentage 2.00%            
Debt Instrument, Convertible, Conversion Price $ 14.72            
Debt Instrument, Convertible, Conversion Ratio 0.0679            
Beneficial Ownership Limitation, Percentage 4.99%            
Beneficial Ownership Limitation Percentage, Notice 61 days            
Beneficial Ownership Limitation After Notice, Percentage 9.99%            
Convertible 2022 Notes [Member]              
Debt Instrument, Interest Rate, Stated Percentage     7.50%        
Debt Instrument, Face Amount     $ 45,000,000        
Proceeds from Convertible Debt     40,900,000        
Discount on Sale of Convertible Notes     2,700,000        
Debt Issuance Costs, Gross     $ 1,400,000        
Debt Instrument, Interest Rate, Effective Percentage     7.50%        
Amortization of Debt Issuance Costs and Discounts, Total       0 200,000 4,000,000  
Expenses Related to Debt Conversion       20,000 1,200,000 2,500,000  
Interest Expense, Debt, Total       $ 0 $ 50,000 $ 1,200,000  
Debt Discounts and Debt Issue Costs Amortization Rate       40.00%      
Debt Instrument, Convertible, Remaining Discount Amortization Period       5 years      
Debt Conversion, Converted Instrument, Shares Issued   39,016          
Debt Conversion, Original Debt, Amount   $ 515,000          
2020 Option Notes [Member]              
Debt Instrument, Convertible, Additional Convertible Amount $ 5,000,000            
Debt Instrument, Purchase Option Term 90 days            
Debt Instrument, Gain (Loss) on Exchange or Conversion $ 4,000,000