Annual report pursuant to Section 13 and 15(d)

Allowance for Doubtful Accounts (Details)

v3.20.4
Allowance for Doubtful Accounts (Details) - USD ($)
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Allowance for Doubtful Accounts Receivable [Roll Forward]    
Balance at the beginning of the year $ 225,000 $ 63,727
Provision for bad debts 135,000 189,441
Charge-offs (150,333) (28,168)
Balance at the end of the year $ 209,667 $ 225,000