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v3.21.2

Intangible Assets and Goodwill (Details 2) | 9 Months Ended
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Sep. 30, 2021 USD ($)
Intangible Assets and Goodwill |
Goodwill, Beginning Balance | $ 272,000
Centric telecom business acquisition | 1,123,000
NetSapiens business acquisition | 26,734,000
Goodwill, Ending Balance | $ 28,129

X
- Definition Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination. + References No definition available. + Details
Name: | crex_BusinessAcquisition
Namespace Prefix: | crex_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- References No definition available. + Details
Name: | crex_CentricTelecomBusinessAcquisition
Namespace Prefix: | crex_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References No definition available. + Details
Name: | crex_GoodwillEnding
Namespace Prefix: | crex_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- References No definition available. + Details
Name: | crex_GoodwillEndingBalance
Namespace Prefix: | crex_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration