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v3.22.1

STOCK-BASED COMPENSATION - Status of restricted stock (Details) - shares | Dec. 31, 2021 | Jun. 30, 2020 | Jun. 30, 2019
--- | --- | --- | ---
Restricted shares |  |  |
Outstanding balance | 0 | 130,400 | 320,800

X
- Definition Number of non-vested options outstanding. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

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- Details
Name: | us-gaap_AwardTypeAxis=us-gaap_RestrictedStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |