BUSINESS SEGMENTS (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Net revenue	$ 32,462	$ 34,465
Operating Income (Loss)	(70)	(947)
Total assets	38,306	35,660
Depreciation and amortization	3,059	3,100
Capital expenditures	1,112	1,017
Manufacturing
Net revenue	13,151	11,605
Operating Income (Loss)	376	(326)
Total assets	13,622	9,807
Depreciation and amortization	411	346
Capital expenditures	350	134
Testing Services
Net revenue	13,846	14,840
Operating Income (Loss)	(997)	(1,040)
Total assets	21,099	21,086
Depreciation and amortization	2,570	2,578
Capital expenditures	762	834
Distribution
Net revenue	5,437	7,958
Operating Income (Loss)	657	751
Total assets	1,156	875
Depreciation and amortization	4	100
Capital expenditures	0	0
Real Estate
Net revenue	28	62
Operating Income (Loss)	(116)	(97)
Total assets	2,070	3,587
Depreciation and amortization	74	76
Capital expenditures	0	0
Fabrication Services
Net revenue	0	0
Operating Income (Loss)	0	0
Total assets	0	27
Depreciation and amortization	0	0
Capital expenditures	0	0
Corporate And Unallocated
Net revenue	0	0
Operating Income (Loss)	(10)	(235)
Total assets	359	278
Depreciation and amortization	0	0
Capital expenditures	$ 0	$ 0