Quarterly report pursuant to Section 13 or 15(d)

Common Stock Transactions - Additional Information (Detail)

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Common Stock Transactions - Additional Information (Detail)
$ / shares in Units, $ in Thousands
 1 Months Ended 3 Months Ended 6 Months Ended 12 Months Ended
Mar. 11, 2016
Aug. 05, 2015
USD ($)
shares
May 31, 2016
USD ($)
Jun. 30, 2016
USD ($)
$ / shares
shares
Jun. 30, 2016
USD ($)
$ / shares
shares
Dec. 31, 2015
USD ($)
shares
May 12, 2016
shares
May 11, 2015
shares
Schedule of Capitalization, Equity [Line Items]                
Common stock, outstanding       20,783,000 20,783,000 15,964,000    
Common stock, shares issued       3,190,000        
Offering price of common stock | $ / shares       $ 5.25 $ 5.25      
Issuance of common stock, net of issuance fees | $     $ 15,200 $ 15,200 $ 16,191      
Issuance of common stock in a private placement | $       $ 1,000 $ 1,000      
Reverse stock split 0.1              
Common stock, shares authorized       35,000,000 35,000,000 200,000,000 35,000,000 200,000,000
Issuance of common stock for acquisition | $           $ 10,179    
Private Placement                
Schedule of Capitalization, Equity [Line Items]                
Common stock, shares issued       170,000        
Energy Source                
Schedule of Capitalization, Equity [Line Items]                
Business acquisition, number of shares issued value | $   $ 10,000            
Common Stock | Energy Source                
Schedule of Capitalization, Equity [Line Items]                
Issuance of common stock for acquisition (in shares)   880,000            
Issuance of common stock for acquisition | $   $ 9,700            
Business acquisition, number of shares issued   869,565            
Business acquisition, number of shares issued value | $   $ 9,500            
Common Stock                
Schedule of Capitalization, Equity [Line Items]                
Common stock, outstanding       20,800,000 20,800,000      
Common stock, shares issued         3,364,000 870,000    
Issuance of common stock for acquisition (in shares)           1,437,000    
Issuance of common stock for acquisition | $           $ 1    
RVL One Limited Liability Company                
Schedule of Capitalization, Equity [Line Items]                
Common stock, outstanding       8,700,000 8,700,000      
Common stock share outstanding owned         42.00%