Annual report pursuant to Section 13 and 15(d)

Annual report pursuant to Section 13 and 15(d)

Class A Redeemable Convertible Preferred Stock - Schedule of Components of Series A Preferred Stock, Separately for Shares Redeemed and for Shares Remaining, After Redemption and Loss on Redemption (Detail)

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Class A Redeemable Convertible Preferred Stock - Schedule of Components of Series A Preferred Stock, Separately for Shares Redeemed and for Shares Remaining, After Redemption and Loss on Redemption (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 22, 2016
Dec. 31, 2015
Dec. 30, 2015
Temporary Equity [Line Items]        
Redeemable Convertible Preferred Stock, shares outstanding 6,600,000   14,666,667  
Add original amount of BCF back to Series A Preferred Stock from APIC $ 24,596      
Series A Redeemable Convertible Preferred Stock [Member]        
Temporary Equity [Line Items]        
Redeemable Convertible Preferred Stock, shares outstanding 6,600,000 6,600,000 14,666,667  
Temporary equity, liquidation value $ 49,500   $ 110,000 $ 110,000
Issue discount (16,560)   (36,800) (36,800)
Value of Beneficial Conversion Feature (44,720)   (44,720) (44,720)
Carrying amount of preferred stock 12,816   28,480 $ 28,480
Deemed Dividends 3,312   7,360  
Amortization expense of BCF $ 6,745   14,988  
Carrying value pre-redemption     $ 50,828  
Shares of Series A Preferred Stock, Redeemed Shares 8,066,667 8,066,667    
Face (conversion) value $ 60,500      
Issue discount (20,240)      
Beneficial conversion feature (24,596)      
Carrying value at Original Issue Date 15,664      
Deemed dividends expense recorded 4,048      
Amortization expense of BCF 8,244      
Carrying value pre-redemption 27,956      
Accelerate discount expense on redeemed shares 18,973      
Remove deemed dividends not payable on redeemed shares (2,781)      
Remove BCF not realized by holder (8,244)      
Add original amount of BCF back to Series A Preferred Stock from APIC 24,596      
Record cash paid at redemption of $55.0 million (60,500)      
Beneficial conversion feature (20,124)      
Carrying value pre-redemption 22,873      
Deemed dividends expense recorded 7,360      
Amortization expense of BCF 14,988      
Carrying value pre-redemption 22,348      
Accelerate discount expense on redeemed shares 18,973      
Record cash paid at redemption of $55.0 million (5,500)      
Cumulative impact on income statement 24,796      
Amounts from deemed dividends and discounts 18,051      
Amounts from BCF 6,745      
Value of original BCF on redeemed shares 24,596      
Temporary equity carrying value and beneficial conversion feature 52,552      
Payments for repurchase of redeemable convertible preferred stock 55,000      
Loss on redemption of Series A Preferred Stock (2,448)      
Income statement expense pre-redemption $ 22,348