Quarterly report pursuant to Section 13 or 15(d)

Non-Current Restricted Cash - Additional Information (Detail)

v3.7.0.1
Non-Current Restricted Cash - Additional Information (Detail)
$ in Thousands
6 Months Ended
Jun. 30, 2017
USD ($)
Restricted Cash and Cash Equivalents Items [Line Items]  
Restricted cash $ 375
Letter of Credit [Member] | Texas [Member]  
Restricted Cash and Cash Equivalents Items [Line Items]  
Restricted cash $ 375
Number of days written notice 30 days