XML 77 R58.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Note K - Stock-based Compensation Plans - Stock Option Plan Comparison (Details) - Restated Option Plan [Member] | 12 Months Ended
--- | ---
Apr. 30, 2018 shares
Minimum exercise price as a percentage of fair market value at date of grant | 100.00%
Last expiration date for outstanding options | May 01, 2027
Shares available for grant (in shares) | 297,500

X
- Definition Minimum exercise price of stock options as a percentage of fair market value at date of grant. + References No definition available. + Details
Name: | crmt_MinimumExercisePriceAsAPercentageOfFairMarketValueAtDateOfGrant
Namespace Prefix: | crmt_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Date the equity-based award expires, in CCYY-MM-DD format. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardExpirationDate
Namespace Prefix: | us-gaap_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

X
- Definition The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_PlanNameAxis=crmt_RestatedOptionPlanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |