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 6 Months Ended
Jun. 30, 2017
Jun. 30, 2017
Dec. 31, 2016
Related Party Transaction [Line Items]      
Note receivable due from related party $ 251 $ 251 $ 251
Houston [Member]      
Related Party Transaction [Line Items]      
Note receivable due from related party 251 251  
Line of credit 500 500  
Law Firm [Member]      
Related Party Transaction [Line Items]      
Legal fees $ 116 $ 650