Annual report pursuant to Section 13 and 15(d)

Allowance for Doubtful Accounts (Details)

v3.20.1
Allowance for Doubtful Accounts (Details) - USD ($)
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Allowance for Doubtful Accounts Receivable [Roll Forward]    
Balance at the beginning of the year $ 63,727 $ 83,789
Provision/(recoveries) for bad debts 189,441 (14,000)
Charge-offs (28,168) (6,062)
Balance at the end of the year $ 225,000 $ 63,727