Quarterly report pursuant to Section 13 or 15(d)

Accounts Receivable - Activity in the allowance for doubtful accounts (Details)

v3.10.0.1
Accounts Receivable - Activity in the allowance for doubtful accounts (Details) - USD ($)
6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Balance at December 31, 2017 $ (178,399)  
Write offs 16,759  
Provisions 98,337 $ (273,727)
Recovery 162,000  
Balance at March 31, 2018 $ (29,125)