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Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
 12 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Mar. 31, 2022
Cash flows from operating activities:      
Net income (loss) $ (978) $ (293) $ 467
Adjustments to reconcile net income (loss) to net cash (used in) provided by operating activities:      
Depreciation of property, plant and equipment 159 209 162
Amortization of operating lease right-of-use assets 599 932 935
Expected credit loss provision (513) 504 52
Write-down of inventories 86 67 89
Impairment of property, plant and equipment 335
Impairment of operating lease right of use assets 527
Gain on disposal of property, plant and equipment (16) (7) (14)
Share-based compensation expenses 58 89 87
Changes in operating assets and liabilities:      
Accounts receivable 1,133 (145) (1,346)
Deferred tax (107) (12) (435)
Inventories (272) 794 (167)
Prepaid expenses and other current assets 46 93 (276)
Accounts payable 36 148 153
Accrued expenses and other current liabilities (118) (461) 190
Operating lease liabilities (527) (888) (871)
Income tax payable (59) (11) 541
Income tax recoverable 3 4 (7)
Long-term accrued expenses 23 17
Long-term deposits (231) 276
Net cash (used in) provided by operating activities 415 809 (164)
Cash flows from investing activities:      
(Placement)/Withdrawal of time deposits 1,075 (1,075)
Disposal of a subsidiary 0
Purchase of property, plant and equipment (118) (92) (134)
Proceeds from disposal of property, plant and equipment 16 8 14
Net cash (used in) provided by investing activities (102) 991 (1,195)
Cash flows from financing activities:      
Shares issued 0 1 0
Share options exercised 59 98 20
Cash dividends paid (616) (1,019) (569)
Net cash used in financing activities (557) (920) (549)
Net (decrease) increase in cash and cash equivalents (244) 880 (1,908)
Cash and cash equivalents at the beginning of year 6,952 6,010 7,757
Effect of exchange rate changes on cash and cash equivalents (107) 62 161
Cash and cash equivalents at the end of year 6,601 6,952 6,010
Supplemental disclosure of cash flow information:      
Income taxes $ 3 $ (1) $ 2