Quarterly report pursuant to Section 13 or 15(d)

Accounts Receivable (Details Textual)

v3.19.1
Accounts Receivable (Details Textual) - USD ($)
3 Months Ended 12 Months Ended
Mar. 31, 2019
Dec. 31, 2018
Accounts Receivable [Abstract]    
Allowances for doubtful accounts $ 839,895 $ 839,895
Provision for doubtful accounts 0 810,580
Accounts receivable write offs $ 0 $ 4,920