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
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