Quarterly report pursuant to Section 13 or 15(d)

Commitments and Contingencies - Additional Information (Detail)

v3.7.0.1
Commitments and Contingencies - Additional Information (Detail) - Seismic Agreement [Member]
$ in Thousands
Mar. 31, 2017
USD ($)
Other Commitments [Line Items]  
Total commitment $ 5,800
Accrued liability $ 233