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Note 12 - Stockholders' Equity (Details Textual) - USD ($) |  | 12 Months Ended
--- | --- | ---
Apr. 22, 2015 | Dec. 31, 2016 | Dec. 31, 2015
Common Stock, Shares Authorized |  | 20,000,000 | 20,000,000
Common Stock, Par or Stated Value Per Share |  | $ 0.01 | $ 0.01
Special Stock Shares Authorized |  | 2,000,000 |
Stock Repurchase Program, Authorized Amount | $ 5,000,000 |  |
Stock Repurchased and Retired During Period, Shares | 230,729 |  | 230,729
Stock Repurchased and Retired During Period, Price Per Share | $ 3 |  |
Stock Repurchased and Retired During Period, Value | $ 692,000 |  |
Special Stock Shares Outstanding |  | $ 0 |

X
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- Definition The amount of special shares of stock outstanding. + References No definition available. + Details
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- 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 Number of shares that have been repurchased and retired during the period. + 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 Reference 2: http://www.xbrl.org/2003/role/presentationRef -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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 Reference 4: 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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