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Note 8 - Income Taxes - Provision for Income Taxes (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Current provision: |  |  |
Federal | $ 3,108,894 | $ 3,045,292 | $ 3,368,974
State | 486,565 | 482,186 | 548,225
Total current income tax expense | 3,595,459 | 3,527,478 | 3,917,199
Deferred provision (benefit): |  |  |
Federal | 183,520 | 212,563 | 210,343
State | 21,591 | 76,607 | (26,853)
Total deferred income provision | 205,111 | 289,170 | 183,490
Total income tax expense | $ 3,800,570 | $ 3,816,648 | $ 4,100,689

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