Quarterly report pursuant to Section 13 or 15(d)

Financings - Additional Information (Detail)

v3.5.0.2
Financings - Additional Information (Detail) - USD ($)
1 Months Ended 6 Months Ended
Aug. 05, 2015
Jul. 31, 2016
Jun. 30, 2016
Dec. 31, 2015
Jun. 30, 2015
Apr. 30, 2015
Dec. 31, 2014
Financing Activities and Borrowing Arrangements [Line Items]              
Line of credit facility, maximum borrowing amount     $ 27,000,000        
Line of credit facility, maturity date     2017-08        
Guaranteed borrowing capacity     $ 7,000,000     $ 5,000,000  
Guaranteed additional borrowing capacity     7,000,000        
Revolving credit facility     22,576,000 $ 22,026,000      
Revolving Credit Facility, additional borrowing capacity     4,400,000        
Cash on hand     5,190,000 $ 219,000 $ 483,000   $ 6,033,000
Total liquidity     $ 9,600,000        
Debt instrument maturity date     Aug. 20, 2017        
Energy Source              
Financing Activities and Borrowing Arrangements [Line Items]              
Business acquisition, promissory notes issued $ 10,000,000            
Energy Source | Promissory notes              
Financing Activities and Borrowing Arrangements [Line Items]              
Business acquisition, promissory notes issued $ 10,000,000            
Subsequent Event | Energy Source | Promissory notes              
Financing Activities and Borrowing Arrangements [Line Items]              
Debt instrument, maturity date   2017-01          
Debt instrument, interest rate   7.00%