Revenue (Details) - USD ($)	3 Months Ended		9 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2019	Jun. 30, 2018
Item Effected [Line Items]
Revenue	$ 9,218,141	$ 5,663,161	$ 24,858,649	$ 24,690,689
ASC 606 [Member]
Item Effected [Line Items]
Contract liabilities	20,935		$ 20,935			$ 102,924
ASC 606 [Member] | Backlog [Member]
Item Effected [Line Items]
Percentage of estimated shipments			24% in 2020; 56% in 2021, 17% in 2022, and 3% thereafter.
ASC 606 [Member] | Units Delivered [Member]
Item Effected [Line Items]
Revenue	7,527,723	4,943,378	$ 20,400,908	22,413,426
ASC 606 [Member] | Milestones Achieved [Member]
Item Effected [Line Items]
Revenue	$ 1,690,418	$ 719,783	$ 4,457,741	$ 2,277,263
ASC 606 [Member] | Forecast [Member] | Backlog [Member]
Item Effected [Line Items]
Intangible assets					$ 10,700,000