v3.26.1
Segment Information - Schedule of Major Activities for Reportable Segments (Details) - USD ($)
$ in Thousands
 12 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Mar. 31, 2024
Net sales      
Total net sales $ 61,332 $ 67,610 $ 69,368
Cost of sales, operating expenses and other income      
Total cost of sales, operating expenses and other income 59,351 64,296 65,583
Operating income (loss)      
Total operating income 1,981 3,314 3,785
Income (loss) before income taxes      
Total income before taxes 10,264 11,300 7,819
Corporate Expenses [Member]      
Cost of sales, operating expenses and other income      
Total cost of sales, operating expenses and other income 2,253 1,348 1,262
Operating income (loss)      
Total operating income (2,253) (1,348) (1,262)
Income (loss) before income taxes      
Total income before taxes (2,253) (1,348) (1,262)
Injection Molded Plastic Parts [Member]      
Net sales      
Total net sales 8,947 11,206 12,391
Cost of sales, operating expenses and other income      
Total cost of sales, operating expenses and other income 10,697 12,516 13,262
Operating income (loss)      
Total operating income (1,750) (1,310) (871)
Income (loss) before income taxes      
Total income before taxes 4,554 5,024 2,308
Electronic Products [Member]      
Net sales      
Total net sales 52,385 56,404 56,977
Cost of sales, operating expenses and other income      
Total cost of sales, operating expenses and other income 46,401 50,432 51,059
Operating income (loss)      
Total operating income 5,984 5,972 5,918
Income (loss) before income taxes      
Total income before taxes $ 7,963 $ 7,624 $ 6,773