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Note 4. Mortgage Banking Derivative (Details Narrative) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Summary of Investment Holdings [Line Items]
Derivative liabilities	$ 117,000		$ 117,000		$ 269,000
Mortgage Banking Derivative [Member]
Summary of Investment Holdings [Line Items]
Notional amount	134,300,000		134,300,000		49,600,000
Derivative assets	313,000		313,000		229,000
Derivative liabilities	3,000		3,000
Gain (loss) derivatives	30,000	$ (10,000)	249,000	$ (42,000)
Noninterest Income, Other	(30,000)	10,000	(249,000)	$ 42,000
Mortgage Banking Derivative [Member] \| Designated as Hedging Instrument [Member]
Summary of Investment Holdings [Line Items]
Gain (loss) derivatives	277,000	56,000	228,000
Noninterest Income, Other	(277,000)	$ (56,000)	(228,000)
Mortgage Banking Derivative [Member] \| Other Assets [Member]
Summary of Investment Holdings [Line Items]
Derivative assets	313,000		313,000		229,000
Mortgage Banking Derivative [Member] \| Other Liabilities [Member]
Summary of Investment Holdings [Line Items]
Derivative liabilities	$ 3,000		$ 3,000		$ 269,000