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Note 2 - Investment Securities (Details) - Amoritized Cost and Fair Values of General Obligation Bonds by Issuer's State (USD $) | Sep. 30, 2014 | Dec. 31, 2013
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Note 2 - Investment Securities (Details) - Amoritized Cost and Fair Values of General Obligation Bonds by Issuer's State [Line Items] |  |
Number of Issuers | 272 | 269
General Obligation Bonds [Member] | Illinois [Member] |  |
Note 2 - Investment Securities (Details) - Amoritized Cost and Fair Values of General Obligation Bonds by Issuer's State [Line Items] |  |
Number of Issuers | 32 | 36
Amortized Cost | $ 23,058,258 | $ 15,063,325
Fair Value | 23,431,499 | 15,264,718
Average Exposure Per Issuer (Fair Value) | 732,234 | 424,020
General Obligation Bonds [Member] | Iowa [Member] |  |
Note 2 - Investment Securities (Details) - Amoritized Cost and Fair Values of General Obligation Bonds by Issuer's State [Line Items] |  |
Number of Issuers | 25 | 30
Amortized Cost | 16,557,625 | 17,946,059
Fair Value | 16,746,965 | 17,444,045
Average Exposure Per Issuer (Fair Value) | 669,879 | 581,468
General Obligation Bonds [Member] | Missouri [Member] |  |
Note 2 - Investment Securities (Details) - Amoritized Cost and Fair Values of General Obligation Bonds by Issuer's State [Line Items] |  |
Number of Issuers | 12 |
Amortized Cost | 6,136,797 |
Fair Value | 6,097,169 |
Average Exposure Per Issuer (Fair Value) | 508,097 |
General Obligation Bonds [Member] | Other State [Member] |  |
Note 2 - Investment Securities (Details) - Amoritized Cost and Fair Values of General Obligation Bonds by Issuer's State [Line Items] |  |
Number of Issuers | 52 | 67
Amortized Cost | 16,674,720 | 22,166,026
Fair Value | 16,908,510 | 21,512,582
Average Exposure Per Issuer (Fair Value) | 325,164 | 321,083
General Obligation Bonds [Member] |  |
Note 2 - Investment Securities (Details) - Amoritized Cost and Fair Values of General Obligation Bonds by Issuer's State [Line Items] |  |
Number of Issuers | 121 | 133
Amortized Cost | 62,427,400 | 55,175,410
Fair Value | 63,184,143 | 54,221,345
Average Exposure Per Issuer (Fair Value) | 522,183 | 407,679
Revenue Bonds [Member] | Iowa [Member] |  |
Note 2 - Investment Securities (Details) - Amoritized Cost and Fair Values of General Obligation Bonds by Issuer's State [Line Items] |  |
Number of Issuers | 37 | 31
Amortized Cost | 59,955,899 | 47,903,572
Fair Value | 60,603,053 | 46,257,997
Average Exposure Per Issuer (Fair Value) | 1,637,920 | 1,492,193
Revenue Bonds [Member] | Missouri [Member] |  |
Note 2 - Investment Securities (Details) - Amoritized Cost and Fair Values of General Obligation Bonds by Issuer's State [Line Items] |  |
Number of Issuers | 65 | 57
Amortized Cost | 54,016,464 | 42,085,249
Fair Value | 53,997,386 | 40,054,613
Average Exposure Per Issuer (Fair Value) | 830,729 | 702,713
Revenue Bonds [Member] | Other State [Member] |  |
Note 2 - Investment Securities (Details) - Amoritized Cost and Fair Values of General Obligation Bonds by Issuer's State [Line Items] |  |
Number of Issuers | 31 | 35
Amortized Cost | 8,298,997 | 9,009,148
Fair Value | 8,387,020 | 8,693,222
Average Exposure Per Issuer (Fair Value) | 270,549 | 248,378
Revenue Bonds [Member] | Indiana [Member] |  |
Note 2 - Investment Securities (Details) - Amoritized Cost and Fair Values of General Obligation Bonds by Issuer's State [Line Items] |  |
Number of Issuers | 12 | 8
Amortized Cost | 17,991,200 | 15,020,000
Fair Value | 17,835,277 | 14,324,717
Average Exposure Per Issuer (Fair Value) | 1,486,273 | 1,790,590
Revenue Bonds [Member] | Kansas [Member] |  |
Note 2 - Investment Securities (Details) - Amoritized Cost and Fair Values of General Obligation Bonds by Issuer's State [Line Items] |  |
Number of Issuers | 6 | 5
Amortized Cost | 12,310,134 | 11,022,382
Fair Value | 12,139,318 | 9,997,068
Average Exposure Per Issuer (Fair Value) | 2,023,220 | 1,999,414
Revenue Bonds [Member] |  |
Note 2 - Investment Securities (Details) - Amoritized Cost and Fair Values of General Obligation Bonds by Issuer's State [Line Items] |  |
Number of Issuers | 151 | 136
Amortized Cost | 152,572,694 | 125,040,351
Fair Value | 152,962,054 | 119,327,617
Average Exposure Per Issuer (Fair Value) | $ 1,012,994 | $ 877,409

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