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Segment Information (Details) - Schedule of segment reporting information - USD ($)
$ in Thousands
 12 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Mar. 31, 2020
Revenue from contracts with customers:      
Total revenue from contracts with customers $ 12,365 $ 9,168 $ 12,558
Operating income (loss):      
Total operating income (loss) 567 (616) 747
Depreciation expense:      
Total depreciation 162 159 145
Capital expenditure:      
Total capital expenditure 134 88 91
Total assets:      
Total assets 14,859 15,486  
Property, plant and equipment, net:      
Total property, plant and equipment, net 643 833  
Metal stamping and Mechanical OEM [Member]      
Revenue from contracts with customers:      
Total revenue from contracts with customers 7,213 5,192 6,929
Operating income (loss):      
Total operating income (loss) 339 (327) 458
Depreciation expense:      
Total depreciation 95 90 83
Capital expenditure:      
Total capital expenditure 78 50 53
Total assets:      
Total assets 7,784 7,874  
Property, plant and equipment, net:      
Total property, plant and equipment, net 380 474  
Electric OEM [Member]      
Revenue from contracts with customers:      
Total revenue from contracts with customers 5,152 3,976 5,629
Operating income (loss):      
Total operating income (loss) 307 (207) 355
Depreciation expense:      
Total depreciation 67 69 62
Capital expenditure:      
Total capital expenditure 56 38 38
Total assets:      
Total assets 6,961 7,440  
Property, plant and equipment, net:      
Total property, plant and equipment, net 263 359  
Corporate [Member]      
Operating income (loss):      
Total operating income (loss) (79) (82) $ (66)
Total assets:      
Total assets $ 114 $ 172