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Acquisitions - Narrative (Detail) - USD ($)
Aug. 20, 2019
Jul. 26, 2019
Dec. 31, 2020
Dec. 31, 2019
Business Acquisition [Line Items]        
Common stock outstanding (in shares)     16,800,612 16,800,612
American Electric        
Business Acquisition [Line Items]        
Shares to be issued prior to conversion (in shares)   276,549    
Fair value of stock (usd per share)   $ 7.12    
Number of shares of the combined company (in shares)   1,466,092    
Cash   $ 650,000    
American Electric | Series A Preferred Stock        
Business Acquisition [Line Items]        
Shares of outstanding series A Convertible Preferred Stock converted (in shares)   1,000,000    
American Electric | Restricted Stock Units and Deferred Shares        
Business Acquisition [Line Items]        
Shares of outstanding series A Convertible Preferred Stock converted (in shares)   15,629    
American Electric | American Electric        
Business Acquisition [Line Items]        
Common stock outstanding (in shares)   1,173,914    
Diversenergy, LLC        
Business Acquisition [Line Items]        
Fair value of stock (usd per share) $ 4.38      
Value of shares issued as partial consideration in acquisition $ 3,000,000.0      
Cash $ 2,000,000      
Diversenergy, LLC | Common Stock        
Business Acquisition [Line Items]        
Number of shares of the combined company (in shares) 684,963      
Board of Directors Chairman | Share Exchange Agreement        
Business Acquisition [Line Items]        
Percentage of beneficial ownership   88.40%