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Note 11 - Treasury Stock and Repurchase Program (Tables) | 3 Months Ended
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Jul. 31, 2016
Notes Tables |
Class of Treasury Stock [Table Text Block] |
(in thousands except for shares and cost per share) |  | Shares |  |  | Total Average Cost Assigned |  |  | Average Cost per Share |  |  | Aggregate Purchase Price Remaining Under the Program |
Balance as of April 30, 2016 (1)(2) |  |  | 243,411 |  |  | $ | 3,040 |  |  | $ | 12.49 |  |  | $ | 1,350 |
Purchases effected in open market during the quarters ended: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
May 31, 2016 (2) |  |  | 7,820 |  |  | $ | 132 |  |  | $ | 16.90 |  |  | $ | 1,218 |
June 30, 2016 (2) |  |  | 19,539 |  |  | $ | 313 |  |  | $ | 16.05 |  |  | $ | 905 |
July 31, 2016 (2) |  |  | 5,355 |  |  | $ | 90 |  |  | $ | 16.85 |  |  | $ | 815 |
Balance as of July 31, 2016 |  |  | 276,125 |  |  | $ | 3,575 |  |  | $ | 12.95 |  |  | $ | 815 |

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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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