Quarterly report pursuant to Section 13 or 15(d)

Notes payable (Detail)

v3.8.0.1
Notes payable (Detail) - USD ($)
$ in Thousands
Sep. 30, 2017
Dec. 31, 2016
Line of Credit Facility [Line Items]    
Notes payable $ 4,200 $ 14,400
Less: Notes payable - current (2,360) (2,360)
Notes payable - noncurrent 1,796 12,066
Value Lighting    
Line of Credit Facility [Line Items]    
Notes payable 2,200 2,400
TNT    
Line of Credit Facility [Line Items]    
Notes payable $ 2,000 2,000
Energy Source    
Line of Credit Facility [Line Items]    
Notes payable   $ 10,000