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Income Taxes (Details) - USD ($)
$ in Thousands
 1 Months Ended 12 Months Ended
Mar. 21, 2018
Mar. 31, 2021
Mar. 31, 2020
Mar. 31, 2019
Income Taxes (Details) [Line Items]        
Income tax, description the Hong Kong Legislative Council passed The Inland Revenue (Amendment) (No. 7) Bill 2017 (the “Bill”) which introduces the two-tiered profits tax rates regime. The Bill was signed into law on March 28, 2018 and was gazetted on the following day. Under the two-tiered profits tax rates regime, the first HK$2 million (equivalent to $257) of profits of the qualifying group entity will be taxed at 8.25%, and profits above HK$2 million will be taxed at 16.5%. The profits of group entities not qualifying for the two-tiered profits tax rates regime will continue to be taxed at a flat rate of 16.5%. The Group has selected Kayser Limited (“Kayser”) as the qualified entity under two-tiered profit tax rates regime and the remaining Hong Kong based subsidiaries are not qualifying under the regime and continue to be taxed at 16.5%.      
Tax losses   $ 2,972 $ 2,723  
Tax losses carried forward   $ 242 99  
Operating loss carry forward expiration date, description   expire during the years ending March 31, 2024 and 2026    
Other tax losses   $ 2,631 $ 2,382  
Hong Kong [Member]        
Income Taxes (Details) [Line Items]        
Effective income tax rate reconciliation, at federal statutory income tax rate   16.50% 16.50% 16.50%
China [Member]        
Income Taxes (Details) [Line Items]        
Effective income tax rate reconciliation, at federal statutory income tax rate   25.00%    
Income tax, description   However, Kayser Myanmar enjoyed a tax exemption for the period through the end of December 31, 2017 and was subject to an income tax rate of 25% starting from January 1, 2018 onward.