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Creation and Redemption of Shares (Details)	9 Months Ended
	Sep. 30, 2025 shares
Creation and Redemption of Shares [Abstract]
Number of shares redeemed	10,000

X

- Definition

Number of shares redeems.

+ References

No definition available.

+ Details

Name:	teth_NumberOfSharesRedeems
Namespace Prefix:	teth_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

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