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Property and Equipment, Net, and Other Assets - Additional Information (Detail) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Feb. 20, 2018
Dec. 31, 2017
Property Plant And Equipment [Line Items]            
Depreciation $ 97,679 $ 110,582 $ 301,651 $ 339,272    
Carrying value of capital lease assets, net 165,630   165,630     $ 243,778
Capital lease assets, accumulated depreciation 334,467   334,467     $ 256,319
Asset Purchase Agreement [Member] | Earth Media Partners, LLC [Member]            
Property Plant And Equipment [Line Items]            
Percentage of ownership interest         19.00%  
Ownership interest amount recorded as investment         $ 246,585  
Accrued earn-out amount 39,521   39,521      
Asset Purchase Agreement [Member] | Earth Media Partners, LLC [Member] | Wholly Owned Subsidiary and Earth911, Inc. [Member] | Disposal Group, Not Discontinued Operations [Member]            
Property Plant And Equipment [Line Items]            
Future earn-out amount         $ 350,000  
Service [Member]            
Property Plant And Equipment [Line Items]            
Depreciation reflected in cost of revenue $ 45,576 $ 43,462 $ 136,574 $ 126,761