Loans and Allowance for Loan Losses (Details 7) - 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
Interest recognized on impaired loans [Member] | Commercial And Industrials [Member]
Loans, Impaired			$ 0	$ 2,000
Average Recorded Investment [Member]
Loans, Impaired	$ 1,421,000	$ 1,290,000	1,350,000	1,288,000
Average Recorded Investment [Member] | Commercial And Industrials [Member]
Loans, Impaired	76,000	101,000	259,000	84,000
Commercial [Member] | Interest recognized on impaired loans [Member] | Commercial And Industrials [Member]
Loans, Impaired	0	0	0	2,000
Commercial [Member] | Average Recorded Investment [Member] | Commercial And Industrials [Member]
Loans, Impaired	0	25,000	183,000	8,000
Asset-Based [Member] | Interest recognized on impaired loans [Member] | Commercial And Industrials [Member]
Loans, Impaired			0
Asset-Based [Member] | Average Recorded Investment [Member] | Commercial And Industrials [Member]
Loans, Impaired	76,000	76,000	76,000	76,000
SBA Loans [Member] | Interest recognized on impaired loans [Member] | Commercial And Industrials [Member]
Loans, Impaired			0
SBA Loans [Member] | Average Recorded Investment [Member] | Commercial And Industrials [Member]
Loans, Impaired	5,000	5,000	0	3,000
Commercial Real Estate [Member] | Interest recognized on impaired loans [Member]
Loans, Impaired	0	0	0	0
Commercial Real Estate [Member] | Average Recorded Investment [Member]
Loans, Impaired	1,345,000	1,189,000	1,091,000	1,204,000
Commercial Real Estate [Member] | Commercial Mortgages [Member] | Interest recognized on impaired loans [Member]
Loans, Impaired	5,000	1,000	0	1,000
Commercial Real Estate [Member] | Commercial Mortgages [Member] | Average Recorded Investment [Member]
Loans, Impaired	1,104,000	936,000	847,000	946,000
Commercial Real Estate [Member] | Religious Organizations [Member] | Interest recognized on impaired loans [Member]
Loans, Impaired	0	0	0	0
Commercial Real Estate [Member] | Religious Organizations [Member] | Average Recorded Investment [Member]
Loans, Impaired	179,000	180,000	179,000	182,000
Commercial Real Estate [Member] | SBA Loans [Member] | Interest recognized on impaired loans [Member]
Loans, Impaired			0		$ 10,000
Commercial Real Estate [Member] | SBA Loans [Member] | Average Recorded Investment [Member]
Loans, Impaired	$ 62,000	$ 73,000	$ 65,000	$ 76,000