Revenues (Revenue from External Customers) (Details) - USD ($)	3 Months Ended		6 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2019	Dec. 31, 2018
Revenues	$ 7,309,785	$ 8,106,998	$ 15,285,422	$ 15,375,895
Respiratory care products
Revenues	2,061,248	2,338,533	4,217,451	4,414,837
Medical gas equipment
Revenues	3,824,007	4,147,086	7,604,573	7,819,678
Emergency medical products
Revenues	$ 1,424,530	$ 1,621,379	$ 3,463,398	$ 3,141,380