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Note 13 - Stockholders' Equity (Details Textual) - USD ($) $ / shares in Units, $ in Thousands | Dec. 31, 2017 | Jan. 01, 2017 | Dec. 31, 2016
--- | --- | --- | ---
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 |  |
Special Stock Par Value | $ 0.10 |  |
Special Stock Shares Outstanding | $ 0 |  |
CoreCard Software, Inc. Acquisition [Member] |  |  |
Business Acquisition, Percentage of Voting Interests Acquired |  | 100.00% |

X
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- Definition Percentage of voting equity interests acquired at the acquisition date in the business combination. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463 + Details
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