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BUSINESS SEGMENTS (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Mar. 31, 2021
Mar. 31, 2020
Net revenue $ 8,112 $ 8,501 $ 23,154 $ 27,286
Operating income (loss) (65) (367) (429) (318)
Total assets 39,125 36,796 39,125 36,796
Depreciation and amortization 755 774 2,224 2,350
Capital expenditures 404 104 621 848
Manufacturing        
Net revenue 3,130 2,519 9,324 8,881
Operating income (loss) 214 (102) 277 (201)
Total assets 12,576 9,871 12,576 9,871
Depreciation and amortization 98 101 310 297
Capital expenditures 60 89 214 124
Testing Services        
Net revenue 3,504 3,741 10,018 12,018
Operating income (loss) (320) (447) (993) (540)
Total assets 21,364 22,332 21,364 22,332
Depreciation and amortization 637 655 1,859 1,999
Capital expenditures 344 15 407 724
Distribution        
Net revenue 1,467 2,225 3,790 6,338
Operating income (loss) 163 207 407 599
Total assets 983 869 983 869
Depreciation and amortization 0 1 0 3
Capital expenditures 0 0 0 0
Real Estate        
Net revenue 11 16 22 49
Operating income (loss) (23) (30) (84) (82)
Total assets 3,784 3,584 3,784 3,584
Depreciation and amortization 20 17 55 51
Capital expenditures 0 0 0 0
Fabrication Services        
Net revenue 0 0 0 0
Operating income (loss) 0 0 0 0
Total assets 0 23 0 23
Depreciation and amortization 0 0 0 0
Capital expenditures 0 0 0 0
Corporate And Unallocated        
Net revenue 0 0 0 0
Operating income (loss) (99) 5 (36) (94)
Total assets 418 117 418 117
Depreciation and amortization 0 0 0 0
Capital expenditures $ 0 $ 0 $ 0 $ 0