Quarterly report pursuant to Section 13 or 15(d)

Revenues - Narrative (Details)

v3.19.1
Revenues - Narrative (Details)
3 Months Ended
Mar. 31, 2019
USD ($)
Revenue from Contract with Customer [Abstract]  
Increase in deferred revenue balance $ 43,344
Deferred revenue 220,979
Payments received in advance of satisfying performance obligations 838,069
Deferred revenue, revenue recognized in period $ 794,725