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Treasury Stock and Repurchase Program (Tables) | 9 Months Ended
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Jan. 31, 2016
Treasury Stock [Abstract] |
Schedule of treasury stock, at cost |
(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, 2015 (1)(2) |  |  | 190,504 |  |  | $ | 2,244 |  |  | $ | 11.78 |  |  | $ | 2,146 |
Purchases effected in open market during the quarters ended: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
July 31, 2015 (2) |  |  | 12,237 |  |  | $ | 166 |  |  | $ | 13.58 |  |  | $ | 1,980 |
October 31, 2015 (2) |  |  | 25,098 |  |  | $ | 382 |  |  | $ | 15.23 |  |  | $ | 1,598 |
January 31, 2016 (2) |  |  | 4,118 |  |  | $ | 61 |  |  | $ | 14.74 |  |  | $ | 1,537 |
Balance as of January 31, 2016 |  |  | 231,957 |  |  | $ | 2,853 |  |  | $ | 12.30 |  |  | $ | 1,537 |
(1) Includes 85,219 shares with a total average cost of $1,036,000 that were acquired during the former repurchase program, which was authorized in January 2011 and expired in January 2012; 18,400 shares were acquired prior to the repurchase program authorized in January 2011. (2) Were acquired during the $3 million repurchase program authorized in September 2012.

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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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