Note 1 - Organization and Description of Business (Details Textual) - AMTI [Member] shares in Millions	Sep. 21, 2023 USD ($) shares
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable, Shares \| shares	7.6
Business Combination, Agreement Termination Amount for Expenses Incurred \| $	$ 450,000

Amount of equity interests of the acquirer, in shares, including instruments or interests issued or issuable in consideration for the business combination.

No definition available.

Name:	ctdh_BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuableShares
Namespace Prefix:	ctdh_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant