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Summary of Significant Accounting Policies (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Mar. 31, 2022 | Mar. 31, 2021 | Mar. 31, 2020 | Mar. 31, 2019 | Mar. 31, 2018
Summary of Significant Accounting Policies (Details) [Line Items] |  |  |  |  |
Provision for credit loss | $ 51 |  |  |  |
Fixed interest rate | 8.00% |  |  |  |
Carrying amount |  |  |  |  | $ 77
VAT and surcharges | $ 133 | 121 | 90 |  |
Contract liabilities | $ 79 | 72 |  |  |
Contribution decription | Contributions are made by the Group to a cap of HK$1,500 (equivalent to $0.19 per month). |  |  |  |
Employee benefit expenses | $ 102 | 75 | 124 |  |
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 | $ 95 | 88 | 99 |  |
Kayser Myanmar [Member] |  |  |  |  |
Summary of Significant Accounting Policies (Details) [Line Items] |  |  |  |  |
Employee benefit expenses | $ 4 | $ 6 | $ 8 |  |
Kayser Myanmar [Member] |  |  |  |  |
Summary of Significant Accounting Policies (Details) [Line Items] |  |  |  |  |
Impairment losses |  |  |  | $ 77 |
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 |  |  |  |

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