Quarterly report pursuant to Section 13 or 15(d)

The Company - Additional Information (Detail)

v3.8.0.1
The Company - Additional Information (Detail)
$ in Thousands
3 Months Ended
Mar. 31, 2018
USD ($)
Segment
Mar. 31, 2017
USD ($)
Dec. 31, 2017
USD ($)
Jan. 01, 2017
USD ($)
Organization And Summary Of Significant Accounting Policies [Line Items]        
Number of reportable segments | Segment 1      
Revenue from sales tax $ 1,000 $ 700    
Liquidity 3,500   $ 7,400  
Cash and cash equivalents 1,439 $ 1,169 945 $ 883
Additional borrowing capacity under the Revolving Credit Facility 2,100   6,500  
Working capital 37,800   34,300  
Energy Source        
Organization And Summary Of Significant Accounting Policies [Line Items]        
Contingent consideration $ 100   $ 100