Accumulated Other Comprehensive Income (Details) - USD ($)		3 Months Ended		9 Months Ended
		Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Accumulated Other Comprehensive Income (Loss) [Line Items]
Amount reclassified from accumulated other comprehensive income		$ 0	$ 0	$ 0	$ 0
Unrealized Gains and Losses on Available-for-Sale Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income (loss), beginning of period	[1]	14,000	(116,000)	(73,000)	(47,000)
Other comprehensive income (loss) before reclassifications	[1],[2]	10,000	(16,000)	97,000	(85,000)
Net current-period other comprehensive income (loss)	[1]	10,000	(16,000)	97,000	(85,000)
Accumulated other comprehensive income (loss), end of period	[1]	$ 24,000	$ (132,000)	$ 24,000	$ (132,000)

[1] All amounts are net of tax. Amounts in parentheses indicate a reduction of other comprehensive income.

[2] There were no amounts reclassified out of other comprehensive income for the three and nine months ended September 30, 2019 and 2018.