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Accounts Receivable (Tables)
 9 Months Ended
Sep. 30, 2019
Accounts Receivable Net Current [Abstract]  
Schedule of Accounts Receivable, Net

Accounts receivable, net consists of the following:

 

 

 

September 30,

 

 

December 31,

 

 

 

2019

 

 

2018

 

Accounts receivable

 

$

9,114,571

 

 

$

10,488,396

 

Unbilled receivables

 

 

107,193

 

 

 

65,157

 

 

 

 

9,221,764

 

 

 

10,553,553

 

Less:  allowance for doubtful accounts

 

 

(13,598

)

 

 

(13,403

)

 

 

$

9,208,166

 

 

$

10,540,150