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SEGMENT INFORMATION - Financial information for segments (Details)
 3 Months Ended
Jun. 30, 2023
USD ($)
item
Jun. 30, 2022
USD ($)
SEGMENT INFORMATION    
Number of reportable segment | item 2  
Net sales from external customers $ 7,371,240 $ 7,076,357
Total operating loss (579,800) (558,009)
Other income (expense), net 1 (33,225)
Interest expense and other expense (94,086) (83,645)
Consolidated loss before income taxes (673,885) (674,879)
Depreciation and amortization 559,735 585,361
Capital expenditures 1,854,002 203,981
Eliminate intersegment revenue    
SEGMENT INFORMATION    
Net sales from external customers (94,990)  
Corporate and unallocated    
SEGMENT INFORMATION    
Total operating loss (550,741) (534,892)
Ranor    
SEGMENT INFORMATION    
Depreciation and amortization 131,135 131,600
Capital expenditures 1,854,002 62,233
Ranor | Operating segments    
SEGMENT INFORMATION    
Net sales from external customers 4,499,097 4,725,931
Total operating loss 875,465 1,435,674
Stadco    
SEGMENT INFORMATION    
Depreciation and amortization 428,600 453,761
Capital expenditures   141,748
Stadco | Operating segments    
SEGMENT INFORMATION    
Net sales from external customers 2,967,133 2,350,426
Total operating loss $ (904,524) $ (1,458,791)