Quarterly report pursuant to Section 13 or 15(d)

The Company - Additional Information (Detail)

v3.10.0.1
The Company - Additional Information (Detail)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2018
USD ($)
Jun. 30, 2017
USD ($)
Jun. 30, 2018
USD ($)
Segment
Jun. 30, 2017
USD ($)
Dec. 31, 2017
USD ($)
Organization And Summary Of Significant Accounting Policies [Line Items]          
Number of reportable segments | Segment     1    
Revenue from sales tax $ 1,400 $ 1,200 $ 2,400 $ 1,900  
Liquidity 2,500   2,500   $ 7,400
Cash and cash equivalents 457   457   945
Additional borrowing capacity under the Revolving Credit Facility 2,000   2,000   6,500
Working capital $ 45,500   $ 45,500   34,300
Energy Source          
Organization And Summary Of Significant Accounting Policies [Line Items]          
Contingent consideration         $ 100