Quarterly report pursuant to Section 13 or 15(d)

Revenue - Schedule of Accounts Receivable, Contract Asset and Deferred Revenue (Details)

v3.19.1
Revenue - Schedule of Accounts Receivable, Contract Asset and Deferred Revenue (Details) - USD ($)
 3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Beginning balance $ 26,073,673  
Ending balance 23,975,367  
Deferred Revenue (current) [Member]    
Beginning balance 25,355 $ 62,104
Increase (decrease), net (4,001) (20,913)
Ending balance 21,354 41,191
Deferred Revenue (long term) [Member]    
Beginning balance 18,949 28,615
Increase (decrease), net 266 (976)
Ending balance 19,215 27,639
Accounts Receivable [Member]    
Beginning balance 7,331,474 3,879,463
Increase (decrease), net 476,393 (102,504)
Ending balance 7,807,867 3,776,959
Contract Asset [Member]    
Beginning balance 2,608,631 1,342,692
Increase (decrease), net (252,317) 47,071
Ending balance $ 2,356,314 $ 1,389,763