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Note 1 - Basis of Presentation (Details Textual) - shares	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Number of Shares Issuable Upon the Exercise of Options and Warrants (in shares)	0	632,660
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares)	0	0

X

- Definition

The number of shares issuable upon the exercise of options and warrants aggregated.

+ References

No definition available.

+ Details

Name:	ctib_NumberOfSharesIssuableUponTheExerciseOfOptionsAndWarrants
Namespace Prefix:	ctib_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

+ Details

Name:	us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration