Note 4 - Loans Leases Receivable - Impaired Loans Leases (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Recorded investment with no specific allowance recorded	$ 4,637,593	$ 3,932,541	$ 3,073,364
Unpaid principal balance with no specific allowance recorded	4,880,273	4,402,147	3,576,870
Average recorded investment with no specific allowance recorded	7,510,986	6,656,069	10,686,930
Interest income recognized with no specific allowance recorded	74,587	25,070	55,825
Interest income recognized for cash payments received with no specific allowance recorded	74,587	25,070	55,825
Recorded investment with specific allowance recorded	15,434,506	7,090,846	15,875,761
Unpaid principal balance with specific allowance recorded	15,512,477	7,106,685	18,008,843
Related allowance	3,642,968	3,304,287	5,244,673
Average recorded investment with specific allowance recorded	5,870,942	6,383,114	9,684,123
Interest income recognized with specific allowance recorded	66,247	13,606	21,368
Interest income recognized for cash payments received with specific allowance recorded	66,247	13,606	21,368
Recorded investment	20,072,099	11,023,387	18,949,125
Unpaid principal balance	20,392,750	11,508,832	21,585,713
Average recorded investment	13,381,928	13,039,183	20,371,053
Interest income recognized	140,834	38,676	77,193
Interest income recognized for cash payments received	140,834	38,676	77,193
Commercial Portfolio Segment [Member]
Recorded investment with no specific allowance recorded	841,895	234,636	246,308
Unpaid principal balance with no specific allowance recorded	951,600	346,072	342,391
Average recorded investment with no specific allowance recorded	2,858,343	380,495	525,543
Interest income recognized with no specific allowance recorded	16,748	7,436	7,599
Interest income recognized for cash payments received with no specific allowance recorded	16,748	7,436	7,599
Recorded investment with specific allowance recorded	8,094,556	5,051,846	7,033,401
Unpaid principal balance with specific allowance recorded	8,098,395	5,055,685	8,190,495
Related allowance	1,771,537	2,592,270	3,300,199
Average recorded investment with specific allowance recorded	2,959,495	4,811,046	3,159,985
Interest income recognized with specific allowance recorded	17,742		14,837
Interest income recognized for cash payments received with specific allowance recorded	17,742		14,837
Recorded investment	8,936,451	5,286,482	7,279,709
Unpaid principal balance	9,049,995	5,401,757	8,532,886
Average recorded investment	5,817,838	5,191,541	3,685,528
Interest income recognized	34,490	7,436	22,436
Interest income recognized for cash payments received	34,490	7,436	22,436
Commercial Real Estate Portfolio Segment [Member] | Owner Occupied Commercial Real Estate Loans [Member]
Recorded investment with no specific allowance recorded		256,761	67,415
Unpaid principal balance with no specific allowance recorded	93,774	350,535	163,638
Average recorded investment with no specific allowance recorded	312,242	447,144	548,464
Interest income recognized with no specific allowance recorded
Interest income recognized for cash payments received with no specific allowance recorded
Recorded investment with specific allowance recorded	322,148		620,896
Unpaid principal balance with specific allowance recorded	322,148		620,896
Related allowance	57,398		4,462
Average recorded investment with specific allowance recorded	385,269		316,743
Interest income recognized with specific allowance recorded
Interest income recognized for cash payments received with specific allowance recorded
Recorded investment	322,148	256,761	688,311
Unpaid principal balance	415,922	350,535	784,534
Average recorded investment	697,511	447,144	865,207
Interest income recognized
Interest income recognized for cash payments received
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member]
Recorded investment with no specific allowance recorded			31,936
Unpaid principal balance with no specific allowance recorded		228,818	143,136
Average recorded investment with no specific allowance recorded		117,406	1,656,401
Interest income recognized with no specific allowance recorded
Interest income recognized for cash payments received with no specific allowance recorded
Recorded investment with specific allowance recorded	4,353,817	193,804	337,076
Unpaid principal balance with specific allowance recorded	4,353,817	205,804	577,894
Related allowance	577,611	76,934	12,087
Average recorded investment with specific allowance recorded	1,022,930	195,986	528,564
Interest income recognized with specific allowance recorded
Interest income recognized for cash payments received with specific allowance recorded
Recorded investment	4,353,817	193,804	369,012
Unpaid principal balance	4,353,817	434,622	721,030
Average recorded investment	1,022,930	313,392	2,184,965
Interest income recognized
Interest income recognized for cash payments received
Commercial Real Estate Portfolio Segment [Member] | Other Non-owner Occupied Commercial Real Estate Loans [Member]
Recorded investment with no specific allowance recorded	1,196,549	1,578,470	491,717
Unpaid principal balance with no specific allowance recorded	1,196,549	1,578,470	491,717
Average recorded investment with no specific allowance recorded	1,322,654	2,953,888	4,925,681
Interest income recognized with no specific allowance recorded			13,283
Interest income recognized for cash payments received with no specific allowance recorded			13,283
Recorded investment with specific allowance recorded	239,600		5,884,343
Unpaid principal balance with specific allowance recorded	239,600		6,583,934
Related allowance	58,910		1,153,471
Average recorded investment with specific allowance recorded	47,920		4,240,000
Interest income recognized with specific allowance recorded
Interest income recognized for cash payments received with specific allowance recorded
Recorded investment	1,436,149	1,578,470	6,376,060
Unpaid principal balance	1,436,149	1,578,470	7,075,651
Average recorded investment	1,370,574	2,953,888	9,165,681
Interest income recognized			13,283
Interest income recognized for cash payments received			13,283
Finance Leases Portfolio Segment [Member]
Recorded investment with no specific allowance recorded	1,690,121	871,884	561,414
Unpaid principal balance with no specific allowance recorded	1,690,121	871,884	561,414
Average recorded investment with no specific allowance recorded	1,731,982	892,281	867,657
Interest income recognized with no specific allowance recorded	43,461	4,142	31,911
Interest income recognized for cash payments received with no specific allowance recorded	43,461	4,142	31,911
Recorded investment with specific allowance recorded	1,566,143	829,457	777,858
Unpaid principal balance with specific allowance recorded	1,566,143	829,457	777,858
Related allowance	848,919	306,193	356,996
Average recorded investment with specific allowance recorded	841,733	474,458	514,144
Interest income recognized with specific allowance recorded	36,303
Interest income recognized for cash payments received with specific allowance recorded	36,303
Recorded investment	3,256,264	1,701,341	1,339,272
Unpaid principal balance	3,256,264	1,701,341	1,339,272
Average recorded investment	2,573,715	1,366,739	1,381,801
Interest income recognized	79,764	4,142	31,911
Interest income recognized for cash payments received	79,764	4,142	31,911
Residential Portfolio Segment [Member]
Recorded investment with no specific allowance recorded	853,294	613,486	1,060,770
Unpaid principal balance with no specific allowance recorded	892,495	649,064	1,060,770
Average recorded investment with no specific allowance recorded	964,590	1,047,001	1,269,213
Interest income recognized with no specific allowance recorded	9,903	3,929	3,032
Interest income recognized for cash payments received with no specific allowance recorded	9,903	3,929	3,032
Recorded investment with specific allowance recorded	807,886	805,301	727,958
Unpaid principal balance with specific allowance recorded	882,018	805,301	763,537
Related allowance	289,112	185,801	151,663
Average recorded investment with specific allowance recorded	573,211	712,085	538,678
Interest income recognized with specific allowance recorded	11,675	7,913	2,967
Interest income recognized for cash payments received with specific allowance recorded	11,675	7,913	2,967
Recorded investment	1,661,180	1,418,787	1,788,728
Unpaid principal balance	1,774,513	1,454,365	1,824,307
Average recorded investment	1,537,801	1,759,086	1,807,891
Interest income recognized	21,578	11,842	5,999
Interest income recognized for cash payments received	21,578	11,842	5,999
Consumer Portfolio Segment [Member]
Recorded investment with no specific allowance recorded	55,734	377,304	613,804
Unpaid principal balance with no specific allowance recorded	55,734	377,304	813,804
Average recorded investment with no specific allowance recorded	321,175	817,854	893,971
Interest income recognized with no specific allowance recorded	4,475	9,563
Interest income recognized for cash payments received with no specific allowance recorded	4,475	9,563
Recorded investment with specific allowance recorded	50,356	210,438	494,229
Unpaid principal balance with specific allowance recorded	50,356	210,438	494,229
Related allowance	39,481	143,089	265,795
Average recorded investment with specific allowance recorded	40,384	189,539	386,009
Interest income recognized with specific allowance recorded	527	5,693	3,564
Interest income recognized for cash payments received with specific allowance recorded	527	5,693	3,564
Recorded investment	106,090	587,742	1,108,033
Unpaid principal balance	106,090	587,742	1,308,033
Average recorded investment	361,559	1,007,393	1,279,980
Interest income recognized	5,002	15,256	3,564
Interest income recognized for cash payments received	$ 5,002	$ 15,256	$ 3,564