Annual report pursuant to Section 13 and 15(d)

Annual report pursuant to Section 13 and 15(d)

Class A Redeemable Convertible Preferred Stock - Summary of Product of Paid-in-kind Dividend Rate (Detail)

v3.6.0.2
Class A Redeemable Convertible Preferred Stock - Summary of Product of Paid-in-kind Dividend Rate (Detail) - Series A Redeemable Convertible Preferred Stock [Member]
12 Months Ended
Dec. 31, 2016
Commencing on the Original Issue Date and Ending on the 1st Anniversary of Original Issue Date [Member]  
Temporary Equity [Line Items]  
PIK Dividend Rate per Annum in Effect 0.00%
Payment In Kind Period Two  
Temporary Equity [Line Items]  
PIK Dividend Rate per Annum in Effect 4.00%
Commencing on the Day After the 4th Anniversary of the Original Issue Date and Ending on the 5th Anniversary of the Original Issue Date  
Temporary Equity [Line Items]  
PIK Dividend Rate per Annum in Effect 5.00%
Commencing on the Day After the 5th Anniversary of the Original Issue Date and Ending on the 6th Anniversary of the Original Issue Date  
Temporary Equity [Line Items]  
PIK Dividend Rate per Annum in Effect 6.00%
Commencing on the Day After the 6th anniversary of the Original Issue Date and Ending on the 7th Anniversary of the Original Issue Date  
Temporary Equity [Line Items]  
PIK Dividend Rate per Annum in Effect 7.00%
Commencing on the Day After the 7th Anniversary of the Original Issue Date and Ending on the 8th Anniversary of the Original Issue Date  
Temporary Equity [Line Items]  
PIK Dividend Rate per Annum in Effect 8.00%
Commencing on the Day After the 8th Anniversary of the Original Issue Date and Ending on the 9th Anniversary of the Original Issue Date  
Temporary Equity [Line Items]  
PIK Dividend Rate per Annum in Effect 9.00%
Commencing on the Day After the 9th Anniversary of the Original Issue Date and Ending on the date of Automatic Conversion  
Temporary Equity [Line Items]  
PIK Dividend Rate per Annum in Effect 10.00%