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Concentrations of Credit Risk and Major Customers and Suppliers - Schedule of Concentrations of Credit Risk and Major Customers and Suppliers (Details)
 12 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Mar. 31, 2023
Customer Concentration Risk [Member] | Customer D [Member] | Accounts Receivable [Member]      
Concentration Risk [Line Items]      
Concentration risk percentage 32.90% 10.70%  
Customer Concentration Risk [Member] | Customer D [Member] | Revenue Benchmark [Member]      
Concentration Risk [Line Items]      
Concentration risk percentage [1] 15.40% 11.20% 16.50%
Customer Concentration Risk [Member] | Customer C [Member] | Accounts Receivable [Member]      
Concentration Risk [Line Items]      
Concentration risk percentage [2] 25.40% 21.80%  
Customer Concentration Risk [Member] | Customer C [Member] | Revenue Benchmark [Member]      
Concentration Risk [Line Items]      
Concentration risk percentage [2],[3] 41.20% 34.40% 33.00%
Customer Concentration Risk [Member] | Customer B [Member] | Accounts Receivable [Member]      
Concentration Risk [Line Items]      
Concentration risk percentage [4] 21.50% 22.10%  
Customer Concentration Risk [Member] | Customer B [Member] | Revenue Benchmark [Member]      
Concentration Risk [Line Items]      
Concentration risk percentage [1],[4] 31.90% 24.00% 35.30%
Customer Concentration Risk [Member] | Customer A [Member] | Accounts Receivable [Member]      
Concentration Risk [Line Items]      
Concentration risk percentage [5] 28.40%  
Customer Concentration Risk [Member] | Customer A [Member] | Revenue Benchmark [Member]      
Concentration Risk [Line Items]      
Concentration risk percentage [6],[7] [5] 12.90% [5]
Customer Concentration Risk [Member] | Customer [Member] | Accounts Receivable [Member]      
Concentration Risk [Line Items]      
Concentration risk percentage 79.80% 83.00%  
Customer Concentration Risk [Member] | Customer [Member] | Revenue Benchmark [Member]      
Concentration Risk [Line Items]      
Concentration risk percentage 88.50% 93.20% 96.70%
Customer Concentration Risk [Member] | Customer E [Member] | Revenue Benchmark [Member]      
Concentration Risk [Line Items]      
Concentration risk percentage [1] [5] 10.70% 11.90%
Supplier Concentration Risk [Member] | Supplier A [Member] | Accounts Payable [Member]      
Concentration Risk [Line Items]      
Concentration risk percentage [8] 19.70% 10.90%  
Supplier Concentration Risk [Member] | Supplier A [Member] | Net Purchases [Member]      
Concentration Risk [Line Items]      
Concentration risk percentage [8] 19.30% 10.70% [9]
Supplier Concentration Risk [Member] | Supplier E [Member] | Accounts Payable [Member]      
Concentration Risk [Line Items]      
Concentration risk percentage [10] 15.50% 11.50%  
Supplier Concentration Risk [Member] | Supplier F [Member] | Accounts Payable [Member]      
Concentration Risk [Line Items]      
Concentration risk percentage [9] 11.00%  
Supplier Concentration Risk [Member] | Supplier D [Member] | Accounts Payable [Member]      
Concentration Risk [Line Items]      
Concentration risk percentage [11] [9] 24.20%  
Supplier Concentration Risk [Member] | Supplier B [Member] | Accounts Payable [Member]      
Concentration Risk [Line Items]      
Concentration risk percentage [9]  
Supplier Concentration Risk [Member] | Supplier B [Member] | Net Purchases [Member]      
Concentration Risk [Line Items]      
Concentration risk percentage [9] [9] 10.30%
Supplier Concentration Risk [Member] | Supplier [Member] | Accounts Payable [Member]      
Concentration Risk [Line Items]      
Concentration risk percentage 35.20% 57.60%  
Supplier Concentration Risk [Member] | Supplier [Member] | Net Purchases [Member]      
Concentration Risk [Line Items]      
Concentration risk percentage 35.50% 10.70% 21.60%
Supplier Concentration Risk [Member] | Supplier C [Member] | Net Purchases [Member]      
Concentration Risk [Line Items]      
Concentration risk percentage 16.20% [9] 11.30%
[1] Sales to these customers were reported in both of the Metal Stamping and Mechanical OEM and Electric OEM operating segments.
[2] Customer C is the same entity as Supplier A below.
[3] Sales to this customer was reported in the Metal Stamping operating segment.
[4] Customer B is the same entity as Supplier D below.
[5] Represented not reaching 10% threshold in the respective years.
[6] Customer A is the same entity as Supplier E below.
[7] Sub-contracting income received was reported in Electric OEM operating segment.
[8] Supplier A is the same entity as Customer C above.
[9] Represented not reaching 10% threshold in the respective years
[10] Supplier E is the same entity as Customer A above.
[11] Supplier D is the same entity as Customer B above.