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SEGMENT INFORMATION - Financial information for segments (Details) | 3 Months Ended | 9 Months Ended
--- | --- | ---
Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($) | Dec. 31, 2022 USD ($) subsidiary | Dec. 31, 2021 USD ($)
SEGMENT INFORMATION |  |  |  |
Number of reportable segment | subsidiary |  |  | 2 |
Net sales from external customers | $ 8,327,345 | $ 6,511,325 | $ 23,926,349 | $ 14,720,964
Total operating income (loss) | 274,315 | (1,145,825) | (371,117) | (1,288,746)
ERTC refundable credits |  |  | 624,045 |
PPP loan forgiveness |  |  |  | 1,317,100
Other income | 254 | 1,999 | 40,590 | 13,390
Interest expense | (93,603) | (94,721) | (260,978) | (181,494)
Income (loss) before income taxes | 180,966 | (1,238,547) | 32,540 | (139,750)
Depreciation and amortization |  |  | 1,666,741 | 978,517
Capital expenditures |  |  | 663,033 | 436,531
Corporate and unallocated |  |  |  |
SEGMENT INFORMATION |  |  |  |
Total operating income (loss) | (498,959) | (710,513) | (1,673,697) | (1,724,896)
Ranor |  |  |  |
SEGMENT INFORMATION |  |  |  |
Net sales from external customers | 4,735,459 | 2,790,254 | 14,395,043 | 9,741,267
Total operating income (loss) | 1,334,565 | (243,945) | 4,077,962 | 586,512
Depreciation and amortization |  |  | 391,172 | 477,327
Capital expenditures |  |  | 175,873 | 387,714
Stadco |  |  |  |
SEGMENT INFORMATION |  |  |  |
Net sales from external customers | 3,591,886 | 3,721,071 | 9,531,306 | 4,979,697
Total operating income (loss) | $ (561,291) | $ (191,367) | (2,775,382) | (150,362)
Depreciation and amortization |  |  | 1,275,569 | 501,190
Capital expenditures |  |  | $ 487,160 | $ 48,817

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