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Note 4 - Loans Leases Receivable - Impaired Loans Leases (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Recorded investment with no specific allowance recorded | $ 7,937,613 | $ 7,117,268 | $ 4,637,593
Unpaid principal balance with no specific allowance recorded | 10,705,985 | 7,202,484 | 4,880,273
Average recorded investment with no specific allowance recorded | 6,209,493 | 6,354,341 | 7,510,986
Interest income recognized with no specific allowance recorded | 279,670 | 216,413 | 74,587
Interest income recognized for cash payments received with no specific allowance recorded | 279,670 | 216,413 | 74,587
Recorded investment with specific allowance recorded | 12,264,945 | 11,236,897 | 15,434,506
Unpaid principal balance with specific allowance recorded | 12,621,231 | 11,240,836 | 15,512,479
Related allowance | 3,658,545 | 3,043,319 | 3,642,968
Average recorded investment with specific allowance recorded | 5,460,056 | 10,512,445 | 5,870,942
Interest income recognized with specific allowance recorded | 112,327 |  | 66,247
Interest income recognized for cash payments received with specific allowance recorded | 112,327 | 218,621 | 66,247
Recorded investment | 20,202,558 | 18,354,163 | 20,072,099
Unpaid principal balance | 23,327,216 | 18,443,318 | 20,392,752
Average recorded investment | 11,669,549 | 16,866,786 | 13,381,928
Interest income recognized | 391,997 | 435,034 | 140,834
Interest income recognized for cash payments received | 391,997 | 435,034 | 140,834
Commercial Portfolio Segment [Member] |  |  |
Recorded investment with no specific allowance recorded | 1,846,136 | 1,634,269 | 841,895
Unpaid principal balance with no specific allowance recorded | 4,539,729 | 1,644,706 | 951,600
Average recorded investment with no specific allowance recorded | 2,346,184 | 1,406,310 | 2,858,343
Interest income recognized with no specific allowance recorded | 209,854 | 71,183 | 16,748
Interest income recognized for cash payments received with no specific allowance recorded | 209,854 | 71,183 | 16,748
Recorded investment with specific allowance recorded | 2,653,315 | 4,613,940 | 8,094,556
Unpaid principal balance with specific allowance recorded | 2,653,315 | 4,617,879 | 8,098,395
Related allowance | 972,647 | 715,627 | 1,771,537
Average recorded investment with specific allowance recorded | 1,118,374 | 4,584,142 | 2,959,495
Interest income recognized with specific allowance recorded | 43,052 | 203,221 | 17,742
Interest income recognized for cash payments received with specific allowance recorded | 43,052 | 203,221 | 17,742
Recorded investment | 4,499,451 | 6,248,209 | 8,936,451
Unpaid principal balance | 7,193,044 | 6,262,585 | 9,049,995
Average recorded investment | 3,464,558 | 5,990,452 | 5,817,838
Interest income recognized | 252,906 | 274,404 | 34,490
Interest income recognized for cash payments received | 252,906 | 274,404 | 34,490
Commercial Real Estate Portfolio Segment [Member] | Owner Occupied Commercial Real Estate Loans [Member] |  |  |
Recorded investment with no specific allowance recorded | 106,470 | 289,261 |
Unpaid principal balance with no specific allowance recorded | 106,470 | 289,261 | 93,774
Average recorded investment with no specific allowance recorded | 106,892 | 79,317 | 312,242
Interest income recognized with no specific allowance recorded |  | 11,902 |
Interest income recognized for cash payments received with no specific allowance recorded |  | 11,902 |
Recorded investment with specific allowance recorded | 304,043 | 151,962 | 322,148
Unpaid principal balance with specific allowance recorded | 660,329 | 151,962 | 322,148
Related allowance | 38,533 | 48,462 | 57,398
Average recorded investment with specific allowance recorded | 176,874 | 221,260 | 385,269
Recorded investment | 410,513 | 441,222 | 322,148
Unpaid principal balance | 766,799 | 441,222 | 415,922
Average recorded investment | 283,766 | 300,577 | 697,511
Interest income recognized |  | 11,902 |
Interest income recognized for cash payments received |  | 11,902 |
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member] |  |  |
Recorded investment with no specific allowance recorded | 506,603 |  |
Unpaid principal balance with no specific allowance recorded | 506,603 |  |
Average recorded investment with no specific allowance recorded | 101,321 |  |
Recorded investment with specific allowance recorded | 148,795 | 4,844,312 | 4,353,817
Unpaid principal balance with specific allowance recorded | 148,795 | 4,844,312 | 4,353,819
Related allowance | 33,095 | 1,379,235 | 577,611
Average recorded investment with specific allowance recorded | 159,389 | 4,447,831 | 1,022,930
Recorded investment | 655,398 | 4,844,312 | 4,353,817
Unpaid principal balance | 655,398 | 4,844,312 | 4,353,819
Average recorded investment | 260,710 | 4,447,831 | 1,022,930
Commercial Real Estate Portfolio Segment [Member] | Other Non-owner Occupied Commercial Real Estate Loans [Member] |  |  |
Recorded investment with no specific allowance recorded | 1,804,125 | 1,171,565 | 1,196,549
Unpaid principal balance with no specific allowance recorded | 1,804,125 | 1,171,565 | 1,196,549
Average recorded investment with no specific allowance recorded | 540,298 | 1,176,738 | 1,322,654
Recorded investment with specific allowance recorded | 7,576,712 | 72,163 | 239,600
Unpaid principal balance with specific allowance recorded | 7,576,712 | 72,163 | 239,600
Related allowance | 2,052,057 | 1,763 | 58,910
Average recorded investment with specific allowance recorded | 3,054,716 | 44,667 | 47,920
Interest income recognized with specific allowance recorded | 57,760 |  |
Interest income recognized for cash payments received with specific allowance recorded | 57,760 |  |
Recorded investment | 9,380,837 | 1,243,728 | 1,436,149
Unpaid principal balance | 9,380,837 | 1,243,728 | 1,436,149
Average recorded investment | 3,595,014 | 1,221,405 | 1,370,574
Interest income recognized | 57,760 |  |
Interest income recognized for cash payments received | 57,760 |  |
Finance Leases Portfolio Segment [Member] |  |  |
Recorded investment with no specific allowance recorded | 1,929,061 | 2,944,540 | 1,690,121
Unpaid principal balance with no specific allowance recorded | 1,929,061 | 2,944,540 | 1,690,121
Average recorded investment with no specific allowance recorded | 2,193,339 | 2,879,695 | 1,731,982
Interest income recognized with no specific allowance recorded | 60,483 | 132,167 | 43,461
Interest income recognized for cash payments received with no specific allowance recorded | 60,483 | 132,167 | 43,461
Recorded investment with specific allowance recorded | 319,536 | 724,953 | 1,566,143
Unpaid principal balance with specific allowance recorded | 319,536 | 724,953 | 1,566,143
Related allowance | 194,008 | 504,469 | 848,919
Average recorded investment with specific allowance recorded | 273,352 | 625,107 | 841,733
Interest income recognized with specific allowance recorded |  |  | 36,303
Interest income recognized for cash payments received with specific allowance recorded |  |  | 36,303
Recorded investment | 2,248,597 | 3,669,492 | 3,256,264
Unpaid principal balance | 2,248,597 | 3,669,492 | 3,256,264
Average recorded investment | 2,466,691 | 3,504,802 | 2,573,715
Interest income recognized | 60,483 | 132,167 | 79,764
Interest income recognized for cash payments received | 60,483 | 132,167 | 79,764
Residential Portfolio Segment [Member] |  |  |
Recorded investment with no specific allowance recorded | 983,753 | 943,388 | 853,294
Unpaid principal balance with no specific allowance recorded | 1,058,532 | 1,018,167 | 892,495
Average recorded investment with no specific allowance recorded | 723,424 | 685,807 | 964,590
Interest income recognized with no specific allowance recorded | 9,043 | 1,161 | 9,903
Interest income recognized for cash payments received with no specific allowance recorded | 9,043 | 1,161 | 9,903
Recorded investment with specific allowance recorded | 1,125,859 | 761,458 | 807,886
Unpaid principal balance with specific allowance recorded | 1,125,859 | 761,458 | 882,018
Related allowance | 257,014 | 355,167 | 289,112
Average recorded investment with specific allowance recorded | 552,539 | 549,286 | 573,211
Interest income recognized with specific allowance recorded | 11,515 | 14,990 | 11,675
Interest income recognized for cash payments received with specific allowance recorded | 11,515 | 14,990 | 11,675
Recorded investment | 2,109,612 | 1,704,846 | 1,661,180
Unpaid principal balance | 2,184,391 | 1,779,625 | 1,774,513
Average recorded investment | 1,275,963 | 1,235,093 | 1,537,801
Interest income recognized | 20,558 | 16,151 | 21,578
Interest income recognized for cash payments received | 20,558 | 16,151 | 21,578
Consumer Portfolio Segment [Member] |  |  |
Recorded investment with no specific allowance recorded | 761,465 | 134,245 | 55,734
Unpaid principal balance with no specific allowance recorded | 761,465 | 134,245 | 55,734
Average recorded investment with no specific allowance recorded | 198,035 | 126,474 | 321,175
Interest income recognized with no specific allowance recorded | 290 |  | 4,475
Interest income recognized for cash payments received with no specific allowance recorded | 290 |  | 4,475
Recorded investment with specific allowance recorded | 136,685 | 68,109 | 50,356
Unpaid principal balance with specific allowance recorded | 136,685 | 68,109 | 50,356
Related allowance | 111,191 | 38,596 | 39,481
Average recorded investment with specific allowance recorded | 124,812 | 40,152 | 40,384
Interest income recognized with specific allowance recorded |  | 410 | 527
Interest income recognized for cash payments received with specific allowance recorded |  | 410 | 527
Recorded investment | 898,150 | 202,354 | 106,090
Unpaid principal balance | 898,150 | 202,354 | 106,090
Average recorded investment | 322,847 | 166,626 | 361,559
Interest income recognized | 290 | 410 | 5,002
Interest income recognized for cash payments received | $ 290 | $ 410 | $ 5,002

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