Quarterly report pursuant to Section 13 or 15(d)

Purchase Price Obligations - Additional Information (Detail)

v3.8.0.1
Purchase Price Obligations - Additional Information (Detail) - Stock Distribution
9 Months Ended
Sep. 30, 2017
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]  
Volatility 60.00%
Risk-free interest rate 1.20%
Dividend yield 0.00%