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Note 5 - Derivative Instruments and Hedging Activities - Hashdex Bitcoin Futures ETF (Details Textual) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Derivative, Average Notional Amount	$ 324.9	$ 902.8	$ 353.6	$ 690.9
Hashdex Bitcoin Futures ETF [Member]
Derivative, Average Notional Amount	$ 2.1		$ 1.9

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- Definition

Represents the average nominal or face amount used to calculate payment on derivative.

+ References

No definition available.

+ Details

Name:	tect_DerivativeAverageNotionalAmount
Namespace Prefix:	tect_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

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- Details

Name:	srt_ConsolidatedEntitiesAxis=tect_HashdexBitcoinFuturesETFMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: