Quarterly report pursuant to Section 13 or 15(d)

Revenues - Narrative (Details)

v3.19.2
Revenues - Narrative (Details)
6 Months Ended
Jun. 30, 2019
USD ($)
Revenue from Contract with Customer [Abstract]  
Increase in deferred revenue balance $ 48,948
Deferred revenue 226,466
Payments received in advance of satisfying performance obligations 1,355,219
Deferred revenue, revenue recognized in period $ 1,306,271