Loans and Allowance for Loan Losses (Details 6) - USD ($)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Total Recorded Investment [Member]
Loans, Impaired			$ 1,325,000		$ 1,437,000
Total Recorded Investment [Member] | Commercial Real Estate [Member]
Loans, Impaired			1,249,000		1,148,000
Total Recorded Investment [Member] | Commercial And Industrials [Member]
Loans, Impaired			76,000		289,000
Related Allowance [Member]
Loans, Impaired			81,000		139,000
Related Allowance [Member] | Commercial Real Estate [Member]
Loans, Impaired			81,000		44,000
Related Allowance [Member] | Commercial And Industrials [Member]
Loans, Impaired			0		95,000
Recorded Investment With No Allowance [Member]
Loans, Impaired			1,114,000		810,000
Recorded Investment With No Allowance [Member] | Commercial Real Estate [Member]
Loans, Impaired			1,038,000		810,000
Recorded Investment With No Allowance [Member] | Commercial And Industrials [Member]
Loans, Impaired			76,000		0
Interest recognized on impaired loans [Member] | Commercial Real Estate [Member]
Loans, Impaired	$ 0	$ 0	0	$ 0
Interest recognized on impaired loans [Member] | Commercial And Industrials [Member]
Loans, Impaired			0	2,000
Recorded Investment With Allowance [Member]
Loans, Impaired			211,000		627,000
Recorded Investment With Allowance [Member] | Commercial Real Estate [Member]
Loans, Impaired			211,000		338,000
Recorded Investment With Allowance [Member] | Commercial And Industrials [Member]
Loans, Impaired			0		289,000
Unpaid Contractual Principal Balance [Member]
Loans, Impaired			1,325,000		1,437,000
Unpaid Contractual Principal Balance [Member] | Commercial Real Estate [Member]
Loans, Impaired			1,249,000		1,148,000
Unpaid Contractual Principal Balance [Member] | Commercial And Industrials [Member]
Loans, Impaired			76,000		289,000
Asset-Based [Member] | Total Recorded Investment [Member] | Commercial And Industrials [Member]
Loans, Impaired			76,000		76,000
Asset-Based [Member] | Related Allowance [Member] | Commercial And Industrials [Member]
Loans, Impaired			0		14,000
Asset-Based [Member] | Recorded Investment With No Allowance [Member] | Commercial And Industrials [Member]
Loans, Impaired			76,000		0
Asset-Based [Member] | Interest recognized on impaired loans [Member] | Commercial And Industrials [Member]
Loans, Impaired			0
Asset-Based [Member] | Recorded Investment With Allowance [Member] | Commercial And Industrials [Member]
Loans, Impaired			0		76,000
Asset-Based [Member] | Unpaid Contractual Principal Balance [Member] | Commercial And Industrials [Member]
Loans, Impaired			76,000		76,000
SBA Loans [Member] | Total Recorded Investment [Member] | Commercial Real Estate [Member]
Loans, Impaired			60,000		71,000
SBA Loans [Member] | Total Recorded Investment [Member] | Commercial And Industrials [Member]
Loans, Impaired			0		0
SBA Loans [Member] | Related Allowance [Member] | Commercial Real Estate [Member]
Loans, Impaired			0		0
SBA Loans [Member] | Related Allowance [Member] | Commercial And Industrials [Member]
Loans, Impaired			0		0
SBA Loans [Member] | Recorded Investment With No Allowance [Member] | Commercial Real Estate [Member]
Loans, Impaired			60,000		71,000
SBA Loans [Member] | Recorded Investment With No Allowance [Member] | Commercial And Industrials [Member]
Loans, Impaired			0		0
SBA Loans [Member] | Interest recognized on impaired loans [Member] | Commercial Real Estate [Member]
Loans, Impaired			0		10,000
SBA Loans [Member] | Interest recognized on impaired loans [Member] | Commercial And Industrials [Member]
Loans, Impaired			0
SBA Loans [Member] | Recorded Investment With Allowance [Member] | Commercial Real Estate [Member]
Loans, Impaired			0		0
SBA Loans [Member] | Recorded Investment With Allowance [Member] | Commercial And Industrials [Member]
Loans, Impaired			0		0
SBA Loans [Member] | Unpaid Contractual Principal Balance [Member] | Commercial Real Estate [Member]
Loans, Impaired			60,000		71,000
SBA Loans [Member] | Unpaid Contractual Principal Balance [Member] | Commercial And Industrials [Member]
Loans, Impaired			0		0
Religious Organizations [Member] | Total Recorded Investment [Member] | Commercial Real Estate [Member]
Loans, Impaired			179,000		179,000
Religious Organizations [Member] | Related Allowance [Member] | Commercial Real Estate [Member]
Loans, Impaired			0		31,000
Religious Organizations [Member] | Recorded Investment With No Allowance [Member] | Commercial Real Estate [Member]
Loans, Impaired			179,000		0
Religious Organizations [Member] | Interest recognized on impaired loans [Member] | Commercial Real Estate [Member]
Loans, Impaired	0	0	0	0
Religious Organizations [Member] | Recorded Investment With Allowance [Member] | Commercial Real Estate [Member]
Loans, Impaired			0		179,000
Religious Organizations [Member] | Unpaid Contractual Principal Balance [Member] | Commercial Real Estate [Member]
Loans, Impaired			179,000		179,000
Commercial [Member] | Total Recorded Investment [Member] | Commercial And Industrials [Member]
Loans, Impaired			0		213,000
Commercial [Member] | Related Allowance [Member] | Commercial And Industrials [Member]
Loans, Impaired			0		81,000
Commercial [Member] | Recorded Investment With No Allowance [Member] | Commercial And Industrials [Member]
Loans, Impaired			0		0
Commercial [Member] | Interest recognized on impaired loans [Member] | Commercial And Industrials [Member]
Loans, Impaired	0	0	0	2,000
Commercial [Member] | Recorded Investment With Allowance [Member] | Commercial And Industrials [Member]
Loans, Impaired			0		213,000
Commercial [Member] | Unpaid Contractual Principal Balance [Member] | Commercial And Industrials [Member]
Loans, Impaired			0		213,000
Commercial Mortgages [Member] | Total Recorded Investment [Member] | Commercial Real Estate [Member]
Loans, Impaired			1,010,000		898,000
Commercial Mortgages [Member] | Related Allowance [Member] | Commercial Real Estate [Member]
Loans, Impaired			81,000		13,000
Commercial Mortgages [Member] | Recorded Investment With No Allowance [Member] | Commercial Real Estate [Member]
Loans, Impaired			799,000		739,000
Commercial Mortgages [Member] | Interest recognized on impaired loans [Member] | Commercial Real Estate [Member]
Loans, Impaired	$ 5,000	$ 1,000	0	$ 1,000
Commercial Mortgages [Member] | Recorded Investment With Allowance [Member] | Commercial Real Estate [Member]
Loans, Impaired			211,000		159,000
Commercial Mortgages [Member] | Unpaid Contractual Principal Balance [Member] | Commercial Real Estate [Member]
Loans, Impaired			$ 1,010,000		$ 898,000