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Note 8 - Shareholders' Equity (Details Textual) - $ / shares | Jun. 30, 2017 | Jun. 30, 2016 | Apr. 13, 2015 | Nov. 21, 2002
--- | --- | --- | --- | ---
Common Stock, Shares Authorized | 150,000,000 | 150,000,000 |  |
Common Stock, Par or Stated Value Per Share | $ 0.01 | $ 0.01 |  |
Preferred Stock, Shares Authorized | 1,055,000 |  |  |
Stock Repurchase Program, Number of Shares Authorized to be Repurchased |  |  | 3,000,000 | 2,000,000
Stock Repurchase Program, Remaining Number of Shares Authorized to be Repurchased | 1,400,000 |  |  |
Preferred Stock, Par or Stated Value Per Share | $ 0.01 |  |  |
Preferred Stock, Shares Issued | 0 | 0 |  |
Preferred Stock, Shares Outstanding | 0 | 0 |  |
Common Class A [Member] |  |  |  |
Common Stock, Shares Authorized | 150,000,000 |  |  |
Common Stock, Par or Stated Value Per Share | $ 0.01 |  |  |

X
- Definition Face amount or stated value per share of common stock. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -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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- Definition The maximum number of common shares permitted to be issued by an entity's charter and bylaws. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -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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- Definition Face amount or stated value per share of preferred stock nonredeemable or redeemable solely at the option of the issuer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Total number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) issued to shareholders (includes related preferred shares that were issued, repurchased, and remain in the treasury). May be all or portion of the number of preferred shares authorized. Excludes preferred shares that are classified as debt. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Aggregate share number for all nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) held by stockholders. Does not include preferred shares that have been repurchased. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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