2. Segment Information and Concentrations (Details) - USD ($)	12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Revenues	$ 8,570,300	$ 10,199,800
Depreciation and Amortization and Impairment	160,900	257,300
Benchtop Laboratory Equipment
Revenues	6,783,600	7,078,800
Foreign Sales	2,589,800	2,680,300
Income (Loss) from Operations	449,700	449,800
Assets	12,232,600	5,280,700
Long-lived Asset Expenditures	36,000	194,500
Depreciation and Amortization and Impairment	116,900	217,800
Catalyst Research Instruments
Revenues	785,900	1,814,900
Foreign Sales	586,500	1,102,300
Income (Loss) from Operations	(472,800)	(130,600)
Assets	1,149,800	1,443,200
Long-lived Asset Expenditures	0	2,200
Depreciation and Amortization and Impairment	1,300	1,000
Bioprocessing Systems
Revenues	1,000,800	1,306,100
Foreign Sales	1,000,400	1,301,200
Income (Loss) from Operations	(727,500)	365,000
Assets	546,100	790,100
Long-lived Asset Expenditures	40,700	15,700
Depreciation and Amortization and Impairment	42,700	38,500
Corporate and Other
Revenues	0	0
Foreign Sales	0	0
Income (Loss) from Operations	(385,700)	0
Assets	868,900	762,000
Long-lived Asset Expenditures	0	0
Depreciation and Amortization and Impairment	0	0
Consolidated
Revenues	8,570,300	10,199,800
Foreign Sales	4,176,700	5,083,800
Income (Loss) from Operations	(1,136,300)	776,100
Assets	14,797,400	8,276,000
Long-lived Asset Expenditures	76,700	212,400
Depreciation and Amortization and Impairment	$ 160,900	$ 257,300