Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies - Additional Information (Detail)

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Summary of Significant Accounting Policies - Additional Information (Detail)
1 Months Ended 3 Months Ended 6 Months Ended
Dec. 01, 2014
shares
Apr. 17, 2014
shares
Dec. 31, 2014
USD ($)
shares
Aug. 31, 2014
USD ($)
Jun. 30, 2014
USD ($)
shares
Jun. 30, 2015
USD ($)
Segment
shares
Jun. 30, 2014
USD ($)
shares
Apr. 30, 2015
USD ($)
Aug. 30, 2014
USD ($)
Dec. 31, 2013
USD ($)
Summary Of Significant Accounting Policies [Line Items]                    
Number of reportable segments | Segment           1        
Cash and cash equivalents     $ 6,033,000   $ 1,702,000 $ 483,000 $ 1,702,000     $ 1,757,000
Cash flow from operations           13,917,000 7,872,000      
Working capital     $ 18,800,000     28,000,000        
Line of credit facility, maximum borrowing amount       $ 25,000,000         $ 25,000,000  
Borrowing capacity           17,900,000        
Debt instrument agreement period       3 years            
Guaranteed additional borrowing capacity               $ 5,000,000    
Bank loan payable           2,400,000        
Convertible stock, Conversion of convertible securities | shares 36,300,171   36,300,171              
Revenue from sales taxes           $ 1,800,000 $ 600,000      
Maturity of temporary cash investments           3 months        
Net deferred tax liabilities           $ 6,000,000        
Business acquisition, number of shares to be issued | shares           5,059,334        
Anti-dilutive shares | shares         300,000   20,500,000      
Scenario, Previously Reported                    
Summary Of Significant Accounting Policies [Line Items]                    
Number of reportable segments | Segment           2        
Value Lighting                    
Summary Of Significant Accounting Policies [Line Items]                    
Net deferred tax liabilities           $ 6,000,000        
Business acquisition, number of shares to be issued | shares   8,468,192                
Minimum                    
Summary Of Significant Accounting Policies [Line Items]                    
Product warranty           1 year        
Intangible assets estimate useful life           1 year        
Maximum                    
Summary Of Significant Accounting Policies [Line Items]                    
Product warranty           10 years        
Intangible assets estimate useful life           17 years 6 months        
Contingent payment of stock issued for acquisitions of businesses           $ 6,200,000