Quarterly report pursuant to Section 13 or 15(d)

Acquisitions - Additional Information (Detail)

v3.4.0.3
Acquisitions - Additional Information (Detail) - USD ($)
$ in Thousands
3 Months Ended
Aug. 05, 2015
Feb. 05, 2015
Mar. 31, 2016
Mar. 31, 2015
Sep. 01, 2015
Business Acquisition [Line Items]          
Business acquisition, number of shares issued     279,634 803,582  
Energy Source          
Business Acquisition [Line Items]          
Business acquisition aggregate purchase consideration $ 31,500        
Business acquisition cash consideration 10,000        
Business acquisition, promissory notes issued 10,000        
Business acquisition consideration payable 1,800        
Business acquisition, number of shares issued value 10,000        
Energy Source | Common Stock          
Business Acquisition [Line Items]          
Business acquisition, value of equity issued $ 9,700        
Business acquisition, number of shares issued 869,565        
DPI Management          
Business Acquisition [Line Items]          
Business acquisition aggregate purchase consideration   $ 600      
Business acquisition cash consideration payment   100      
Inventory   $ 600      
Business acquisition consideration paid         $ 150
DPI Management | Cash payable on March 1, 2016          
Business Acquisition [Line Items]          
Business acquisition consideration payable     $ 150    
DPI Management | Payable on September 1, 2016 in cash or common stock          
Business Acquisition [Line Items]          
Business acquisition consideration payable     $ 200