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Note 11 - Treasury Stock and Repurchase Program (Details Textual) - USD ($) |  | 1 Months Ended |
--- | --- | --- | ---
Oct. 30, 2018 | Oct. 31, 2019 | Jul. 31, 2019 | Oct. 30, 2018 | Jan. 30, 2012 | Jan. 31, 2011 | Oct. 19, 2018
Treasury Stock, Shares, Acquired |  | 12,636 | 3,857 |  |  |  |
October 2018 Share Repurchase Program [Member] |  |  |  |  |  |  |
Stock Repurchase Program, Authorized Amount | $ 2,000,000 |  |  | $ 2,000,000 |  |  | $ 2,000,000
Treasury Stock, Shares, Acquired |  |  |  | 42,266 |  |  |
Former Repurchase Program [Member] |  |  |  |  |  |  |
Treasury Stock, Shares, Acquired |  |  |  |  | 85,219 |  |
January 2011 Share Repurchase Program [Member] |  |  |  |  |  |  |
Treasury Stock, Shares, Acquired |  |  |  |  |  | 18,400 |
September 2012 Share Repurchase Program [Member] |  |  |  |  |  |  |
Stock Repurchase Program, Authorized Amount | $ 3,000,000 |  |  | $ 3,000,000 |  |  |
Treasury Stock, Shares, Acquired | 207,047 |  |  |  |  |  |

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- Definition Amount of stock repurchase plan authorized. + References No definition available. + Details
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- Definition Number of shares that have been repurchased during the period and are being held in treasury. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21463-112644 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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