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Note 7 - Employee Benefit and Savings Plan (Tables) | 12 Months Ended
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Dec. 31, 2016
Notes Tables |
Defined Contribution Plan Disclosures [Table Text Block] |
Year Ended December 31, |  | Maximum Matching Contribution per Participant * |  |  | Total Matching Contribution |
2016 |  | $ | 10,600 |  |  | $ | 277,753 |
2015 |  | $ | 10,600 |  |  | $ | 290,388 |
2014 |  | $ | 10,400 |  |  | $ | 286,224 |

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- Definition Tabular disclosure of defined contribution pension plans or defined contribution other postretirement plans, separately for pension plans and other postretirement benefit plans. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 70 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=49170846&loc=d3e28014-114942 + Details
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