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Note I - Stock Based Compensation (Details) - Stock Option Plan Comparison | 6 Months Ended
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Oct. 31, 2013
1997 Plan [Member] |
Note I - Stock Based Compensation (Details) - Stock Option Plan Comparison [Line Items] |
Minimum exercise price as a percentage of fair market value at date of grant | 100.00%
Last expiration date for outstanding options | Jul. 02, 2017
2007 Plan [Member] |
Note I - Stock Based Compensation (Details) - Stock Option Plan Comparison [Line Items] |
Minimum exercise price as a percentage of fair market value at date of grant | 100.00%
Last expiration date for outstanding options | May 06, 2023
Shares available for grant at October 31, 2013 (in Shares) | 367,500

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- Definition Date the equity-based award expires, in CCYY-MM-DD format. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- 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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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