Leases (Schedule of Lease Costs and Other Lease Information) (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Operating lease
Operating lease cost	$ 575,000	$ 396,000	$ 1,146,000	$ 759,000
Short-term lease cost	24,000	110,000	63,000	240,000
Variable lease cost	99,000	87,000	216,000	125,000
Sublease income
Total Rent and occupancy	698,000	593,000	1,425,000	1,124,000
Cash paid for amounts included in the measurement of lease liabilities
Operating cash flows from operating leases	617,000	444,000	1,231,000	826,000
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	$ 160,000	$ 106,000	$ 2,075,000	$ 4,943,000