Quarterly report pursuant to Section 13 or 15(d)

Related Parties - Additional Information (Detail)

v3.7.0.1
Related Parties - Additional Information (Detail) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2017
Dec. 31, 2016
Related Party Transaction [Line Items]    
Note receivable due from related party $ 251 $ 251
Houston [Member]    
Related Party Transaction [Line Items]    
Note receivable due from related party 251  
Letter of credit 500  
Law Firm [Member]    
Related Party Transaction [Line Items]    
Legal fees $ 534