Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies - Schedule of Changes in Fair Value of Financial Instruments (Detail)

v3.5.0.2
Summary of Significant Accounting Policies - Schedule of Changes in Fair Value of Financial Instruments (Detail) - Level 3 [Member] - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Fair Value, Instruments Classified in Shareholders' Equity Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Beginning Balance $ 1,220 $ 13,596
Issuance of financial instrument 0 0
Change in fair value 39 (9,902)
Settlement of financial instrument   (1,513)
Ending Balance $ 1,259 $ 2,181