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CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($)
 3 Months Ended 6 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS        
Net sales $ 759,999 $ 7,203,269 $ 4,584,246 $ 11,801,785
Cost of goods sold 300,857 5,205,326 3,430,969 8,716,138
GROSS PROFIT 459,142 1,997,943 1,153,277 3,085,647
Selling, general and administrative expense 1,311,187 1,209,352 2,424,490 2,606,773
Engineering and product development expense 76,682 110,371 188,689 197,972
Operating (loss) income (928,727) 678,220 (1,459,902) 280,902
Other income (expense):        
Gain on sale of assets     2,820,668  
Change in fair value of derivative component of convertible debt (47,000)   (47,000)  
Interest expense - net (11,053) (89,642) (7,225) (134,530)
Net (loss) income before taxes (986,780) 588,578 1,306,541 146,372
Provision for income tax expense (13,000) (11,600) (496,000) (11,600)
NET (LOSS) INCOME $ (999,780) $ 576,978 $ 810,541 $ 134,772
(Loss) earnings per share:        
Basic (in dollars per share) $ (0.43) $ 0.25 $ 0.35 $ 0.06
Diluted (in dollars per share) $ (0.43) $ 0.25 $ 0.33 $ 0.06
Shares used in computing earnings (earnings) per share:        
Weighted average basic shares outstanding (in shares) 2,312,887 2,312,887 2,312,887 2,312,887
Weighted average diluted shares outstanding (in shares) 2,312,887 2,312,887 2,487,431 2,312,887