BUSINESS SEGMENTS (Details) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Net revenue	$ 6,841	$ 9,823
Operating income (loss)	(327)	222
Total assets	35,828	36,118
Depreciation and amortization	702	786
Capital expenditures	87	539
Manufacturing
Net revenue	2,625	3,317
Operating income (loss)	(18)	(12)
Total assets	10,383	9,434
Depreciation and amortization	106	86
Capital expenditures	67	19
Testing Services
Net revenue	2,954	4,390
Operating income (loss)	(337)	68
Total assets	20,848	22,138
Depreciation and amortization	579	681
Capital expenditures	20	520
Distribution
Net revenue	1,258	2,099
Operating income (loss)	124	204
Total assets	758	785
Depreciation and amortization	0	1
Capital expenditures	0	0
Real Estate
Net revenue	4	17
Operating income (loss)	(27)	(17)
Total assets	3,722	3,577
Depreciation and amortization	17	18
Capital expenditures	0	0
Fabrication Services
Net revenue	0	0
Operating income (loss)	0	0
Total assets	25	27
Depreciation and amortization	0	0
Capital expenditures	0	0
Corporate And Unallocated
Net revenue	0	0
Operating income (loss)	(69)	(21)
Total assets	92	157
Depreciation and amortization	0	0
Capital expenditures	$ 0	$ 0