6. Goodwill and Other Intangible Assets (Details) - USD ($)	12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Cost	$ 2,406,300
Accumulated amortization	2,277,600
Net	128,700	$ 175,000
Technology, trademarks
Cost	664,700	663,800
Accumulated amortization	662,000	661,700
Net	$ 2,700	$ 2,100
Technology, trademarks | Minimum
Useful life	5 years	5 years
Technology, trademarks | Maximum
Useful life	10 years	10 years
Trade names
Cost	$ 140,000	$ 140,000
Accumulated amortization	140,000	124,400
Net	$ 0	$ 15,600
Useful life	6 years	6 years
Websites
Cost	$ 210,000	$ 210,000
Accumulated amortization	210,000	210,000
Net	$ 0	$ 0
Useful life	5 years	5 years
Customer relationships
Cost	$ 357,000	$ 357,000
Accumulated amortization	321,400	308,100
Net	$ 35,600	$ 48,900
Customer relationships | Minimum
Useful life	9 years	9 years
Customer relationships | Maximum
Useful life	10 years	10 years
Sublicense agreements
Cost	$ 294,000	$ 294,000
Accumulated amortization	253,600	224,100
Net	$ 40,400	$ 69,900
Useful life	10 years	10 years
Non-compete agreements
Cost	$ 384,000	$ 384,000
Accumulated amortization	384,000	384,000
Net	$ 0	$ 0
Useful life	5 years	5 years
IPR and D
Cost	$ 110,000	$ 110,000
Accumulated amortization	110,000	110,000
Net	$ 0	$ 0
Useful life	3 years	3 years
Other intangible assets
Cost	$ 246,600	$ 221,700
Accumulated amortization	196,600	183,200
Net	$ 50,000	$ 38,500
Useful life	5 years	5 years