Note 12 - Stock-based Compensation - Summary of Outstanding Options (Details)	3 Months Ended
Mar. 31, 2025 $ / shares shares
Time Vesting Options [Member]
Shares Outstanding (in shares) \| shares	575,792
Outstanding, Weighted Average Remaining Contractual Term (Year)	4 years 10 months 28 days
Outstanding, Weighted Average Exercise Price (in dollars per share)	$ 9.03
Shares Exercisable (in shares) \| shares	575,792
Exercisable, Weighted Average Exercise Price (in dollars per share)
Time Vesting Options [Member] \| Range One [Member]
Lower Range Limit (in dollars per share)	4.01
Upper Range Limit (in dollars per share)	$ 8
Shares Outstanding (in shares) \| shares	506,672
Outstanding, Weighted Average Remaining Contractual Term (Year)	5 years 4 months 28 days
Outstanding, Weighted Average Exercise Price (in dollars per share)	$ 7.4
Shares Exercisable (in shares) \| shares	506,672
Exercisable, Weighted Average Exercise Price (in dollars per share)	$ 7.4
Time Vesting Options [Member] \| Range Two [Member]
Lower Range Limit (in dollars per share)	$ 8.01
Shares Outstanding (in shares) \| shares	69,120
Outstanding, Weighted Average Remaining Contractual Term (Year)	1 year 2 months 19 days
Outstanding, Weighted Average Exercise Price (in dollars per share)	$ 21.04
Shares Exercisable (in shares) \| shares	69,120
Exercisable, Weighted Average Exercise Price (in dollars per share)	$ 21.04
Performance Vesting Awards [Member] \| Range One [Member]
Shares Outstanding (in shares) \| shares	240,000
Outstanding, Weighted Average Remaining Contractual Term (Year)	5 years 2 months 1 day
Outstanding, Weighted Average Exercise Price (in dollars per share)	$ 7.59
Shares Exercisable (in shares) \| shares	240,000
Exercisable, Weighted Average Exercise Price (in dollars per share)	$ 7.59
Market Vesting Options [Member] \| Range One [Member]
Shares Outstanding (in shares) \| shares	733,334
Outstanding, Weighted Average Remaining Contractual Term (Year)	7 years 2 months 15 days
Outstanding, Weighted Average Exercise Price (in dollars per share)	$ 3
Shares Exercisable (in shares) \| shares	0
Exercisable, Weighted Average Exercise Price (in dollars per share)

The floor of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (g)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

+ Details

Name:	us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	duration

- Definition

The number of shares reserved for issuance pertaining to the outstanding exercisable stock options as of the balance sheet date in the customized range of exercise prices for which the market and performance vesting condition has been satisfied.

+ References

+ Details

Name:	us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

The number of shares reserved for issuance pertaining to the outstanding stock options as of the balance sheet date for all option plans in the customized range of exercise prices.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(ii)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(i)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

+ Details

Name:	us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

The ceiling of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

+ References

+ Details

Name:	us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	duration

- Definition

Weighted average exercise price as of the balance sheet date for those equity-based payment arrangements exercisable and outstanding.

+ References

+ Details

Name:	us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

The weighted average price as of the balance sheet date at which grantees could acquire the underlying shares with respect to all outstanding stock options which are in the customized range of exercise prices.

+ References

+ Details

Name:	us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Weighted average remaining contractual term of outstanding stock options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 718
-SubTopic 10
-Subparagraph (e)(1)
-Name Accounting Standards Codification
-Paragraph 2
-Section 50
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

+ Details

Name:	us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageRemainingContractualTerm2
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_AwardTypeAxis=crex_TimeVestingOptionsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis=crex_RangeOneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis=crex_RangeTwoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_AwardTypeAxis=crex_PerformanceVestingAwardsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_AwardTypeAxis=crex_MarketVestingOptionsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: