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Summary of Significant Accounting Policies (Details) - USD ($)
$ in Thousands
 12 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Mar. 31, 2021
Mar. 31, 2020
Summary of Significant Accounting Policies (Details) [Line Items]        
Expected credit loss provision $ 554 $ 51    
Fixed interest rate   8.00%    
VAT and surcharges   $ 133 $ 121 $ 106
Contract liabilities   $ 79  
Contribution decription   Contributions are made by both the Group and the employee to a cap of HK$1,500 (equivalent to $0.19 per month) each by the Group and by the employee respectively.    
Employee benefit expenses $ 52 $ 48 44  
Income tax, description The Group recognizes the effect of income tax positions only if those positions are more likely than not of being sustained. Recognized income tax positions are measured at the largest amount that is greater than 50% likely of being realized.      
Mandatory Provident Fund [Member]        
Summary of Significant Accounting Policies (Details) [Line Items]        
Employee benefit expenses $ 90 102 75  
Kayser Myanmar [Member]        
Summary of Significant Accounting Policies (Details) [Line Items]        
Employee benefit expenses $ 4 $ 4 $ 6  
Machinery and Equipment [Member] | Minimum [Member]        
Summary of Significant Accounting Policies (Details) [Line Items]        
Estimated useful lives 5 years      
Machinery and Equipment [Member] | Maximum [Member]        
Summary of Significant Accounting Policies (Details) [Line Items]        
Estimated useful lives 10 years      
Leasehold Improvements [Member] | Minimum [Member]        
Summary of Significant Accounting Policies (Details) [Line Items]        
Estimated useful lives 2 years      
Leasehold Improvements [Member] | Maximum [Member]        
Summary of Significant Accounting Policies (Details) [Line Items]        
Estimated useful lives 5 years