BUSINESS SEGMENTS (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Net revenue		$ 8,201	$ 8,962	$ 15,042	$ 18,785
Operating income (loss)		(37)	(173)	(364)	49
Total assets		38,363	38,455	38,363	38,455
Depreciation and amortization		766	918	1,469	1,576
Capital expenditures		128	205	215	744
Manufacturing
Net revenue		3,569	3,045	6,194	6,362
Operating income (loss)		81	(87)	63	(99)
Total assets		11,739	10,542	11,739	10,542
Depreciation and amortization		110	149	212	196
Capital expenditures		87	16	154	35
Testing Services
Net revenue		3,560	3,887	6,514	8,277
Operating income (loss)		(336)	(161)	(673)	(93)
Total assets		21,900	23,314	21,900	23,314
Depreciation and amortization		636	751	1,222	1,344
Capital expenditures		41	189	63	709
Distribution
Net revenue		1,065	2,014	2,323	4,113
Operating income (loss)		120	188	244	392
Total assets		802	802	802	802
Depreciation and amortization		0	1	1	2
Capital expenditures		0	0	0	0
Real Estate
Net revenue		7	16	11	33
Operating income (loss)		(34)	(35)	(61)	(52)
Total assets		3,846	3,650	3,846	3,650
Depreciation and amortization		20	17	35	34
Capital expenditures		0	0	0	0
Fabrication Services
Net revenue	[1]	0	0	0	0
Operating income (loss)	[1]	0	0	0	0
Total assets	[1]	0	27	0	27
Depreciation and amortization	[1]	0	0	0	0
Capital expenditures	[1]	0	0	0	0
Corporate And Unallocated
Net revenue		0	0	0	0
Operating income (loss)		132	(78)	63	(99)
Total assets		76	120	76	120
Depreciation and amortization		0	0	0	0
Capital expenditures		$ 0	$ 0	$ 0	$ 0

[1] Fabrication services is a discontinued operation.