Revenue from contracts with customers (Details) - USD ($)	9 Months Ended	12 Months Ended
Mar. 31, 2018	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2017
Movement in Deferred Revenue [Roll Forward]
Deferred Revenue	$ 481,180	$ 426,804	$ 481,180	$ 388,434
Deferred Revenue, Additions	968,971	887,980
Deferred Revenue, Revenue Recognized	$ 876,225	$ 942,356

Amount of deferred revenue recognized for transactions arising during the current reporting period. Deferred revenue is a liability as of the balance sheet date related to a revenue producing activity for which revenue has not yet been recognized. Generally, an Entity records deferred revenue when it receives consideration from a customer before achieving certain criteria that must be met for revenue to be recognized in conformity with GAAP.

No definition available.

Name:	us-gaap_DeferredRevenueAdditions
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration