Common stock warrants issuance period.

No definition available.

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Balance Type:	na
Period Type:	duration

- Definition

Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03.15(a))
-URI https://asc.fasb.org/extlink&oid=126734703&loc=d3e572229-122910

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-Name Accounting Standards Codification
-Topic 942
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-Paragraph 1
-Subparagraph (SX 210.9-03.15(5))
-URI https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878

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Balance Type:	credit
Period Type:	instant

- Definition

Face amount or stated value per share of common stock.

+ References

+ Details

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Balance Type:	na
Period Type:	instant

- Definition

Including the current and noncurrent portions, aggregate carrying value as of the balance sheet date of loans payable (with maturities initially due after one year or beyond the operating cycle if longer).

+ 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(16))
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-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(16)(a)(2))
-URI https://asc.fasb.org/extlink&oid=126734703&loc=d3e572229-122910

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The cash inflow associated with the amount received from entity's raising of capital via private rather than public placement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3255-108585

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Per share or per unit amount of equity securities issued.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of new stock issued during the period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
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Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_SubsidiarySaleOfStockAxis=us-gaap_PrivatePlacementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementEquityComponentsAxis=us-gaap_WarrantMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_SubsidiarySaleOfStockAxis=HET_DebtSettlementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_SubsidiarySaleOfStockAxis=HET_OfficersDirectorAndConsultantsCompensationMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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SCHEDULE OF TRANSACTIONS ON SHARE CAPITAL (Details) (Parenthetical)				3 Months Ended		12 Months Ended
	Sep. 28, 2021 USD ($) $ / shares shares	Jul. 08, 2021 USD ($) $ / shares shares	Feb. 08, 2021 USD ($) $ / shares shares	Mar. 31, 2022 USD ($) $ / shares	Mar. 31, 2021 USD ($)	Dec. 31, 2021 USD ($) $ / shares shares	Dec. 31, 2021 CNY (¥)
Subsidiary, Sale of Stock [Line Items]
Proceeds from issuance of private placement \| $					$ 20,000
Common stock par value				$ 0.0001
Private Placement [Member]
Subsidiary, Sale of Stock [Line Items]
Proceeds from issuance of private placement \| $	$ 238,188	$ 100,000	$ 20,000
Issuance of common stock for private placement, shares \| shares	2,381,880	1,000,000	200,000
Common stock par value			$ 0.10
Shares issued price per shares	$ 0.10	$ 0.10
Private Placement [Member] \| Warrant [Member]
Subsidiary, Sale of Stock [Line Items]
Common stock par value	$ 0.25	$ 0.25	$ 0.25
Common stock warrants issuance period	24 months	36 months	36 months
Debt Settlement [Member]
Subsidiary, Sale of Stock [Line Items]
Issuance of common stock for private placement, shares \| shares						760,000
Accounts payable \| $						$ 76,000
Debt Settlement [Member] \| Shenzhen Smarten Technology Co Ltd [Member]
Subsidiary, Sale of Stock [Line Items]
Issuance of common stock for private placement, shares \| shares						1,546,120
Shares issued price per shares						$ 0.10
Loans payable						$ 154,612	¥ 1,000,000
Debt Settlement [Member] \| Warrant [Member]
Subsidiary, Sale of Stock [Line Items]
Shares issued price per shares						$ 0.10
Officers Director and Consultants Compensation [Member]
Subsidiary, Sale of Stock [Line Items]
Issuance of common stock for private placement, shares \| shares						1,050,000
Officers Director and Consultants Compensation [Member] \| Deferred Bonus [Member]
Subsidiary, Sale of Stock [Line Items]
Issuance of common stock for private placement, shares \| shares						2,000,000
Shares issued price per shares						$ 0.10
Officers Director and Consultants Compensation [Member] \| Warrant [Member]
Subsidiary, Sale of Stock [Line Items]
Shares issued price per shares						$ 0.10