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Note 4 - Revenue Recognition (Details Textual) | 12 Months Ended
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Dec. 31, 2023
Software Licensing and Delivery [Member] | Minimum [Member] |
Revenue Recognition, Contract Term (Month) | 12 months
Software Licensing and Delivery [Member] | Maximum [Member] |
Revenue Recognition, Contract Term (Month) | 36 months
Support Service [Member] | Minimum [Member] |
Revenue Recognition, Contract Term (Month) | 12 months
Support Service [Member] | Maximum [Member] |
Revenue Recognition, Contract Term (Month) | 36 months
Media [Member] | Minimum [Member] |
Revenue Recognition, Contract Term (Month) | 1 day
Revenue Recognition, Commission Percentage on Revenue | 30.00%
Media [Member] | Maximum [Member] |
Revenue Recognition, Contract Term (Month) | 8 years
Revenue Recognition, Commission Percentage on Revenue | 40.00%

X
- Definition Represents the commission percentage from revenue contracts recognized for the period. + References No definition available. + Details
Name: | crex_RevenueRecognitionCommissionPercentageOnRevenue
Namespace Prefix: | crex_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents contract term under revenue recognition. + References No definition available. + Details
Name: | crex_RevenueRecognitionContractTerm
Namespace Prefix: | crex_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | srt_ProductOrServiceAxis=crex_SoftwareLicensingAndDeliveryMember
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: |

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

X
- Details
Name: | srt_ProductOrServiceAxis=crex_SupportServiceMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=crex_MediaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |