Consolidated Statements of Changes in Shareholders' Equity (Unaudited) - USD ($)	Common Stock [Member]	Additional Paid-in Capital [Member]	AOCI Attributable to Parent [Member]	Retained Earnings [Member]	Total
Balance (in shares) at Dec. 31, 2016	5,565,943
Balance at Dec. 31, 2016	$ 556,595	$ 18,017,163	$ 239,461	$ (7,432,236)	$ 11,380,983
Common stock issued, $7 per share (in shares)	85,950
Common stock issued, $7 per share	$ 8,595	593,055			601,650
Costs associated with common stock issued		(223,394)			(223,394)
Common Stock issued, Northern Plains Capital Corporation merger	$ 164,446	2,932,934			3,097,380
Other comprehensive income			52,693		52,693
Net loss				(593,103)	(593,103)
Balance (in shares) at Sep. 30, 2017	7,296,351
Balance at Sep. 30, 2017	$ 729,636	21,319,758	292,154	(8,025,339)	14,316,209
Balance (in shares) at Dec. 31, 2017	7,310,939
Balance at Dec. 31, 2017	$ 731,095	21,280,437	405,438	(8,481,268)	13,935,702
Common stock issued, $7 per share (in shares)	204,553
Common stock issued, $7 per share	$ 20,455	1,411,416			1,431,871
Costs associated with common stock issued		(417,088)			(417,088)
Other comprehensive income			(1,647,536)		(1,647,536)
Net loss				(783,473)	(783,473)
Balance (in shares) at Sep. 30, 2018	7,515,492
Balance at Sep. 30, 2018	$ 751,550	$ 22,274,765	$ (1,242,098)	$ (9,264,741)	$ 12,519,476