Note 5 - Derivative Instruments and Hedging Activities - Hashdex Bitcoin Futures ETF (Details Textual) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Derivative, Average Notional Amount	$ 348.7	$ 653.8	$ 321.8
Hashdex Bitcoin Futures ETF [Member]
Derivative, Average Notional Amount	$ 2.0	$ 1.4

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

No definition available.

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