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Note 13 - Treasury Stock and Repurchase Program (Tables) | 12 Months Ended
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Apr. 30, 2017
Notes Tables |
Class of Treasury Stock [Table Text Block] |
($ in thousands except for cost per share) |  | Shares |  |  | Cost Assigned |  |  | Average Cost per Share |  |  | Aggregate Purchase Price Remaining Under the Program |
Balance as of April 30, 2014 (1) |  |  | 182,071 |  |  | $ | 2,122 |  |  | $ | 11.65 |  |  | $ | 2,268 |
Purchases effected in open market (2) |  |  | 8,433 |  |  | $ | 122 |  |  | $ | 14.47 |  |  | $ | 2,146 |
Balance as of April 30, 2015 |  |  | 190,504 |  |  | $ | 2,244 |  |  | $ | 11.78 |  |  | $ | 2,146 |
Purchases effected in open market (2) |  |  | 52,907 |  |  | $ | 796 |  |  | $ | 15.05 |  |  | $ | 1,350 |
Balance as of April 30, 2016 |  |  | 243,411 |  |  | $ | 3,040 |  |  | $ | 12.49 |  |  | $ | 1,350 |
Purchases effected in open market (2) |  |  | 44,924 |  |  | $ | 741 |  |  | $ | 16.51 |  |  | $ | 609 |
Balance as of April 30, 2017 |  |  | 288,335 |  |  | $ | 3,781 |  |  | $ | 13.11 |  |  | $ | 609 |

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- Definition Tabular disclosure of treasury stock, including, but not limited to, average cost per share, description of share repurchase program, shares repurchased, shares held for each class of treasury stock. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6405834&loc=d3e23315-112656 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6405834&loc=d3e23285-112656 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6405813&loc=d3e23239-112655 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6405834&loc=d3e23309-112656 + Details
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