Note 15 - Profit-sharing Plan (Details Textual) - USD ($) $ in Thousands		12 Months Ended
Apr. 01, 2018	Dec. 31, 2022	Dec. 31, 2021
Defined Contribution Plan, Cost		$ 142	$ 19
Pension Plan 401(K) [Member]
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent	15.00%
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay	50.00%
Defined Contribution Plan, Employer Matching Contribution, Percent of Match	6.00%
Defined Contribution Plan, Employer Matching Contribution, Effective Percent of Match	3.00%
Registered Retirement Savings Plan [Member]
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent	18.00%
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay	50.00%
Defined Contribution Plan, Employer Matching Contribution, Percent of Match	6.00%
Defined Contribution Plan, Employer Matching Contribution, Effective Percent of Match	3.00%

Effective percentage employer matches of the employee's percentage contribution matched.

No definition available.

Name:	crex_DefinedContributionPlanEmployerMatchingContributionEffectivePercentOfMatch
Namespace Prefix:	crex_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of cost for defined contribution plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 70
-Section 50
-Paragraph 1
-URI https://asc.fasb.org/extlink&oid=49170846&loc=d3e28014-114942

+ Details

Name:	us-gaap_DefinedContributionPlanCostRecognized
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan.

+ References

No definition available.

+ Details

Name:	us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage employer matches of the employee's percentage contribution matched.

+ References

No definition available.

+ Details

Name:	us-gaap_DefinedContributionPlanEmployerMatchingContributionPercentOfMatch
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Maximum percentage of employee gross pay the employee may contribute to a defined contribution plan.

+ References

No definition available.

+ Details

Name:	us-gaap_DefinedContributionPlanMaximumAnnualContributionsPerEmployeePercent
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_RetirementPlanTypeAxis=crex_PensionPlan401kMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RetirementPlanTypeAxis=crex_RegisteredRetirementSavingsPlanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: