Quarterly report pursuant to Section 13 or 15(d)

Convertible Debt (Details)

v3.4.0.3
Convertible Debt (Details) - USD ($)
3 Months Ended
Jun. 29, 2015
Mar. 31, 2016
Mar. 31, 2015
Dec. 31, 2015
Debt Instrument [Line Items]        
Deferred debt issuance costs, net   $ 3,957,987   $ 4,187,271
Deferred debt cost amortization   1,435,213   $ 2,717,609
Convertible Debt [Member] | Convertible Senior Notes Due 2020 [Member]        
Debt Instrument [Line Items]        
Aggregate principal amount $ 115,000,000      
Coupon rate 7.00%      
Amount of underwriter's discount $ 3,700,000      
Amortization of discount   188,000 $ 0  
Deferred debt issuance costs, net   207,000 0  
Deferred debt cost amortization   $ 12,000 0  
Effective percentage   7.70%    
Interest expense   $ 2,000,000 $ 0  
Conversion rate, principal amount of convertible note $ 1,000      
Percentage of principal amount redeemed 100.00%      
Common Stock [Member] | Convertible Debt [Member] | Convertible Senior Notes Due 2020 [Member]        
Debt Instrument [Line Items]        
Conversion rate, number of common stock (in shares) 30.303      
Conversion price per share of common stock $ 33