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RELATED PARTY BALANCES AND TRANSACTIONS (Details) - USD ($)	Dec. 31, 2019	Dec. 31, 2018
Other receivables - related party		$ 12,036
Lin Zhao
Other receivables - related party	0	3,419
Liang Yuan
Other receivables - related party	$ 0	$ 8,617

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- Definition

Amount, before allowance, of receivables classified as other, due within one year or the operating cycle, if longer.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

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- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=bhat_LinZhaoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

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- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=bhat_LiangYuanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: