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Note 4 - Debt - Leverage Ratios (Details)	3 Months Ended
	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017
Maximum [Member]
Leverage ratio	2.75	3		3.5		4.25	4.5	4.75
Minimum [Member]
Leverage ratio	1	1		1		1	1	1

X

- Definition

This element represents leverage ratio that is the how much capital comes in the form of debt (loans).

+ References

No definition available.

+ Details

Name:	ctib_LeverageRatio
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_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: