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Staff Retirement Plans (Details) - USD ($) $ in Thousands | 12 Months Ended
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Mar. 31, 2021 | Mar. 31, 2020 | Mar. 31, 2019
Staff Retirement Plans (Details) [Line Items] |  |  |
Cost of contribution to the staff retirement plans | $ 163 | $ 223 | $ 114
Hong Kong [Member] |  |  |
Staff Retirement Plans (Details) [Line Items] |  |  |
Mandatory provident fund, description | The MPF is available to all employees aged 18 to 64 with at least 60 days of service under the employment of the Group in Hong Kong. Contributions are made by the Group to the MPF at a rate of 5% based on each employee’s relevant compensation, subject to a cap of HK$1,500 (equivalent to $0.19) per month. |  |
Myanmar [Member] |  |  |
Staff Retirement Plans (Details) [Line Items] |  |  |
Mandatory provident fund, description | Contributions are made by the Group to the social security plan at a rate of 3% based on each employee’s relevant compensation, subject to a cap of 9,000 Kyat (equivalent to $0.006) per month. |  |

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- Definition Description of mandatory provident fund. + References No definition available. + Details
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Balance Type: | na
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- References No definition available. + Details
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- Definition Amount of cost for defined contribution plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 70 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=49170846&loc=d3e28014-114942 + Details
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- Details
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- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |