Quarterly report pursuant to Section 13 or 15(d)

Notes payable (Detail)

v3.8.0.1
Notes payable (Detail) - USD ($)
$ in Thousands
Mar. 31, 2018
Dec. 31, 2017
Line of Credit Facility [Line Items]    
Notes payable $ 2,100 $ 2,100
Less: Notes payable - current (1,886) (1,796)
Notes payable - noncurrent 180 270
Value Lighting    
Line of Credit Facility [Line Items]    
Notes payable $ 2,100 $ 2,100