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SHORT-TERM INVESTMENTS - Additional information (Details) - HKD ($) $ in Thousands | 6 Months Ended | 9 Months Ended
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Jun. 30, 2022 | Jun. 30, 2021 | Sep. 30, 2022 | Sep. 30, 2021
SHORT-TERM INVESTMENTS |  |  |  |
Realized gain from short-term investments | $ 12,491 | $ 0 | $ 16,919 | $ 0

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- Definition Amount of realized gain (loss) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27357-111563 + Details
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- References No definition available. + Details
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