XML 94 R58.htm IDEA: XBRL DOCUMENT v3.20.1
CONVERTIBLE NOTES - Additional information (Details) - USD ($)
1 Months Ended 12 Months Ended
Dec. 07, 2016
Jun. 30, 2018
Jul. 24, 2017
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Dec. 02, 2016
Sep. 18, 2013
Net proceeds from issuance of convertible notes     $ 9,500,000     $ 9,542,000    
Debt Conversion, Converted Instrument, Shares Issued 2,384,673       1,123,964      
Repayments of Convertible Debt       $ 0 $ 4,752,000 10,961,000    
Embedded Derivative, Gain (Loss) on Embedded Derivative, Net       $ 0 $ 0 $ (38,061,000)    
Convertible Notes Payable [Member]                
Principal amount               $ 69,000,000
2021 Notes [Member]                
Principal amount     $ 10,000,000       $ 22,500,000  
Number of shares for basis conversion           117.64706    
Interest rate       7.50%     7.50%  
Conversion price per share       $ 8.50        
Base value for conversion rate       $ 1,000        
Minimum Cash Balance required to be maintained       7,500,000        
Maximum Debt Instrument Convertible Conversion Share Number           178.7310    
Debt Instrument Maturity Year     2021          
4.5% Convertible Notes [Member]                
Principal amount   $ 3,423,000 $ 9,000,000     $ 54,100,000    
Debt Conversion Converted Instrument Amount, Cash   $ 2,230,000            
Debt Conversion, Converted Instrument, Shares Issued   261,363            
Repayments of Convertible Debt   $ 2,530,000            
Convertible Notes Due Two Thousand Twenty One [Member]                
Principal amount $ 40,186,000              
Convertible Notes 2013 [Member]                
Interest rate               4.50%
2021 Notes [Member]                
Debt Instrument, Redemption, Description         Prior to the maturity date, the Company may redeem in cash:any or all of the 2021 Notes if the last reported sale price of the common stock for at least 20 trading days (whether or not consecutive) during the period of 30 consecutive trading days exceeds 150% of the conversion price on each applicable trading day, orall of the 2021 Notes then outstanding if the aggregate principal amount of the 2021 Notes then outstanding is less than 15% of the aggregate principal amount of the notes issued.      
Debt Conversion, Converted Instrument, Shares Issued         153,742      
Repayments of Convertible Debt         $ 15,887      
Long-term Debt, Gross       $ 57,900,000        
Debt Conversion, Original Debt, Amount         $ 1,150,000      
Four Point Five Percentage Convertible Notes 2022 [Member]                
Principal amount     $ 8,550,000          
Maturity           Nov. 15, 2021    
Interest rate     4.50%          
Repayments of Convertible Debt     $ 275,000          
Debt Instrument Maturity Year     2022          
Four Point Five Percentage Convertible Notes 2018 [Member]                
Principal amount     $ 9,000,000