Note 17 - Condensed Parent Only Financial Statements - Statements of Cash Flows (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Cash Flows from Operating Activities
Net income	$ 1,937,347	$ 1,994,306
Adjustments to reconcile net income to net cash provided by operating activities:
Increase (decrease) in other assets	1,496,144	(262,729)
Net cash used in operating activities	3,325,062	3,482,708
Cash Flows from Investing Activities
Net cash provided by investing activities	(10,856,688)	(34,082,366)
Cash Flows from Financing Activities
Proceeds from stock options exercised	8,925	119,066
Shares repurchased and cancelled	(2,852,882)	(1,639,487)
Dividends paid	(1,857,946)	(856,036)
Net cash (used in) financing activities	5,139,579	35,274,299
Net (decrease) in cash and cash equivalents	(2,392,047)	4,674,641
Cash and cash equivalents:
Beginning of period	8,430,458	3,755,817
End of period	6,038,411	8,430,458
Supplemental Disclosures of Cash Flow Information
Cash paid for taxes, net of refunds received	448,000	766,077
Parent Company [Member]
Cash Flows from Operating Activities
Net income	1,937,347	1,994,306
Adjustments to reconcile net income to net cash provided by operating activities:
Increase (decrease) in other assets	51,496	(33,424)
Undistributed net income of subsidiary	(1,990,700)	(2,062,622)
Net cash used in operating activities	(1,857)	(101,740)
Cash Flows from Investing Activities
Payments received on ESOP notes receivable	179,613	171,717
Net cash provided by investing activities	179,613	171,717
Cash Flows from Financing Activities
Proceeds from stock options exercised	8,925	119,066
Shares repurchased and cancelled	(2,852,882)	(1,639,487)
Dividends paid	(1,857,946)	(856,036)
Net cash (used in) financing activities	(4,701,903)	(2,376,457)
Net (decrease) in cash and cash equivalents	(4,524,147)	(2,306,480)
Cash and cash equivalents:
Beginning of period	6,958,943	9,265,423
End of period	2,434,796	6,958,943
Supplemental Disclosures of Cash Flow Information
Cash paid for taxes, net of refunds received	$ (33,000)	$ (40,808)