Quarterly report pursuant to Section 13 or 15(d)

Financings - Additional Information (Detail)

v3.7.0.1
Financings - Additional Information (Detail) - USD ($)
 1 Months Ended 3 Months Ended
Jan. 26, 2017
Feb. 28, 2017
Jul. 31, 2016
Aug. 31, 2015
Mar. 31, 2017
Mar. 31, 2016
Apr. 12, 2017
Dec. 31, 2016
May 31, 2016
Financing Activities and Borrowing Arrangements [Line Items]                  
Line of credit facility, maximum borrowing amount $ 50,000,000                
Line of credit facility, maturity date Jan. 26, 2020                
Guaranteed borrowing capacity         $ 7,000,000        
Revolving credit facility         40,812,000     $ 25,993,000  
Interest Expenses         400,000 $ 200,000      
Notes payable         4,400,000     14,400,000  
Notes payable, current         2,360,000     2,360,000  
Subsequent Event                  
Financing Activities and Borrowing Arrangements [Line Items]                  
Guaranteed borrowing capacity             $ 3,000,000    
London Interbank Offered Rate (LIBOR)                  
Financing Activities and Borrowing Arrangements [Line Items]                  
Debt instrument, basis spread on variable rate 2.75%                
Base Rate                  
Financing Activities and Borrowing Arrangements [Line Items]                  
Debt instrument, basis spread on variable rate 1.75%                
Value Lighting                  
Financing Activities and Borrowing Arrangements [Line Items]                  
Debt refinance amount         3,700,000        
Value Lighting | Debt Instrument Due in Twenty Eighteen November Twenty Two                  
Financing Activities and Borrowing Arrangements [Line Items]                  
Lump sum payment         $ 1,400,000        
Debt instrument maturity date         Nov. 22, 2018        
Energy Source                  
Financing Activities and Borrowing Arrangements [Line Items]                  
Interest Expenses           $ 100,000      
Repayment of notes $ 400,000                
Energy Source | Maximum                  
Financing Activities and Borrowing Arrangements [Line Items]                  
Interest Expenses         $ 100,000        
Energy Source | Promissory notes                  
Financing Activities and Borrowing Arrangements [Line Items]                  
Debt instrument maturity date     Jan. 20, 2017 Jul. 20, 2016          
Debt instrument, interest rate     7.00% 5.00%          
Notes payable, current       $ 10,000,000          
TNT                  
Financing Activities and Borrowing Arrangements [Line Items]                  
Debt instrument maturity date   Nov. 06, 2017              
Notes payable                 $ 2,000,000
Debt instrument, interest rate                 5.00%
TNT | Maximum                  
Financing Activities and Borrowing Arrangements [Line Items]                  
Accrued interest         100,000     $ 100,000  
Interest Expenses         $ 100,000        
TNT | Debt Instrument Due in Twenty Seventeen April Twenty First                  
Financing Activities and Borrowing Arrangements [Line Items]                  
Debt instrument maturity date         Apr. 21, 2017        
Notes payable                 $ 1,000,000
TNT | Debt Instrument Due in Twenty Seventeen November Six                  
Financing Activities and Borrowing Arrangements [Line Items]                  
Debt instrument maturity date         Nov. 06, 2017        
Notes payable                 $ 1,000,000