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Note 9 - Notes Payable and Capital Leases - Leverage Ratios (Details)	3 Months Ended	6 Months Ended
	Jun. 30, 2019	Sep. 30, 2019
Minimum [Member]
Leverage ratio	3	2.75
Maximum [Member]
Leverage ratio	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_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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