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Profit-Sharing Plan (Details)	12 Months Ended
	Dec. 31, 2017
Profit Sharing Plan (Textual)
Percentage of pretax compensation to the plan	15.00%
Percentage of employer contribution	50.00%
Percentage of employee wages	6.00%
Percentage of effective rate	3.00%

X

- Definition

Its represented percentage of effective rate.

+ References

No definition available.

+ Details

Name:	crex_DefinedContributionPlanEmployerMatchingEffectiveRate
Namespace Prefix:	crex_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	crex_ProfitSharingPlanTextualAbstract
Namespace Prefix:	crex_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- 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:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Percentage of employer's matching contributions to a defined contribution plan that vests in a given year.

+ References

No definition available.

+ Details

Name:	us-gaap_DefinedContributionPlanEmployersMatchingContributionAnnualVestingPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- 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:	num:percentItemType
Balance Type:	na
Period Type:	duration