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Leases (Details 2) $ in Thousands | 12 Months Ended
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Dec. 31, 2019 USD ($)
Cash paid for amounts included in the measurement of lease liabilities: |
Operating cash flows from operating leases | $ 719
Operating cash flows from finance leases | 1
Financing cash flows from finance leases | $ 31

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- Definition Amount of Financing cash flows from finance leases. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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- Definition Amount of operating cash flows from finance leases. + References No definition available. + Details
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Namespace Prefix: | crex_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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X
- Definition Amount of operating cash flows from operating leases. + References No definition available. + Details
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Namespace Prefix: | crex_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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