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Concentrations of Risk (Details)	12 Months Ended
	Jun. 30, 2021 USD ($)	Jun. 30, 2021 HKD ($)	Jun. 30, 2020 USD ($)
Concentrations of Risk (Details) [Line Items]
Deposited from banks	$ 0		$ 500,000
Insurance coverage of each bank	$ 250,000	$ 500,000
Vendor concentration risk percentage	89.00%	89.00%
Hong Kong [Member]
Concentrations of Risk (Details) [Line Items]
Insurance coverage of each bank	$ 64,000

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- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References

No definition available.

+ Details

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Balance Type:	na
Period Type:	duration

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- References

No definition available.

+ Details

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Namespace Prefix:	hht_
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- Definition

The amount of insurance coverage of each bank.

+ References

No definition available.

+ Details

Name:	hht_InsuranceCoverageOfBank
Namespace Prefix:	hht_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

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- Definition

A bank's noninterest bearing demand deposits in other banks (such as correspondents).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.1)
-URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878

+ Details

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Balance Type:	debit
Period Type:	instant

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- Details

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