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Note 7 - Intangible Assets and Goodwill - Schedule of Acquired Finite-lived Intangible Assets (Details) | 12 Months Ended
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Dec. 31, 2022
Technology-Based Intangible Assets [Member] | Minimum [Member] |
Useful Life (Year) | 7 years
Technology-Based Intangible Assets [Member] | Maximum [Member] |
Useful Life (Year) | 10 years
Purchased and Developed Software [Member] | Minimum [Member] |
Useful Life (Year) | 3 years
Purchased and Developed Software [Member] | Maximum [Member] |
Useful Life (Year) | 5 years
Trademarks [Member] | Minimum [Member] |
Useful Life (Year) | 3 years
Trademarks [Member] | Maximum [Member] |
Useful Life (Year) | 5 years
Customer Relationships [Member] | Minimum [Member] |
Useful Life (Year) | 3 years
Customer Relationships [Member] | Maximum [Member] |
Useful Life (Year) | 15 years
Noncompete Agreements [Member] |
Useful Life (Year) | 2 years

X
- Definition Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | us-gaap_FiniteLivedIntangibleAssetUsefulLife
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_TechnologyBasedIntangibleAssetsMember
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: | us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=crex_PurchasedAndDevelopedSoftwareMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_TrademarksMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_CustomerRelationshipsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_NoncompeteAgreementsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |