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Note 4 - Debt - Fixed Charge Coverage Ratio (Details) - Maximum [Member]	3 Months Ended				9 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2021
Fixed Charge Coverage Ratio	1.05	0.95	0.85	0.75
Forecast [Member]
Fixed Charge Coverage Ratio					1.15

X

- Definition

Financial ratio that measures the entity's ability to pay all of its fixed charges or expenses with its income before interest and income taxes.

+ References

No definition available.

+ Details

Name:	ctib_FixedChargeCoverageRatio
Namespace Prefix:	ctib_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_StatementScenarioAxis=srt_ScenarioForecastMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: