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v3.20.1

Note 9 - Notes Payable and Capital Leases - Fixed Charge Coverage Ratio (Details) | 3 Months Ended
--- | ---
Mar. 31, 2021 | Dec. 31, 2020 | Sep. 30, 2020 | Jun. 30, 2020 | Mar. 31, 2020
Minimum [Member] | Forecast [Member] |  |  |  |  |
Fixed Charge Coverage Ratio | 1.15 | 1.05 | 0.95 | 0.85 |
Maximum [Member] | Forecast [Member] |  |  |  |  |
Fixed Charge Coverage Ratio | 1 | 1 | 1 | 1 |
Subsequent Event [Member] | Minimum [Member] |  |  |  |  |
Fixed Charge Coverage Ratio |  |  |  |  | 0.75
Subsequent Event [Member] | Maximum [Member] |  |  |  |  |
Fixed Charge Coverage Ratio |  |  |  |  | 1

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_MinimumMember
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: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |