Leases (Schedule of Lease Costs and Other Lease Information) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Operating lease
Operating lease cost	$ 609,000	$ 509,000	$ 1,755,000	$ 1,268,000
Short-term lease cost	20,000	81,000	83,000	321,000
Variable lease cost	65,000	40,000	281,000	165,000
Sublease income
Total Rent and occupancy	694,000	630,000	2,119,000	1,754,000
Cash paid for amounts included in the measurement of lease liabilities
Operating cash flows from operating leases	614,000	512,000	1,845,000	1,338,000
Lease right-of-use assets obtained in exchange for new lease liabilities
Lease right-of-use assets obtained in exchange for new lease liabilities - operating leases	$ 278,000		$ 2,353,000	$ 4,943,000