Annual report pursuant to Section 13 and 15(d)

Subsequent Events (Details)

v3.6.0.2
Subsequent Events (Details) - Notes - Notes Due February 1, 2033 - $ / shares
1 Months Ended 12 Months Ended
Apr. 01, 2015
Jan. 31, 2013
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Subsequent Event [Line Items]          
Common stock trigger price (in usd per share) $ 9.19   $ 9.19    
Convertible debt, threshold percentage of stock price trigger 130.00% 130.00% 130.00%    
Conversion price (in dollars per share) $ 7.07 $ 7.07 $ 7.07 $ 7.07 $ 7.07
Number of consecutive trading days applicable conversion price 30 days        
Conversion rate   14.14827% 14.14827% 14.14827% 14.14827%
Minimum          
Subsequent Event [Line Items]          
Number of trading days   20 days 20 days    
Maximum          
Subsequent Event [Line Items]          
Number of consecutive trading days applicable conversion price   30 days 30 days