Annual report pursuant to Section 13 and 15(d)

Notes payable (Detail)

v3.7.0.1
Notes payable (Detail) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Line of Credit Facility [Line Items]    
Notes payable $ 14,400 $ 12,800
Less: Notes payable-current (2,360) (10,360)
Notes payable-noncurrent 12,066 2,426
Energy Source    
Line of Credit Facility [Line Items]    
Notes payable 10,000 10,000
Value Lighting    
Line of Credit Facility [Line Items]    
Notes payable 2,400 $ 2,800
TNT    
Line of Credit Facility [Line Items]    
Notes payable $ 2,000