Leases - Additional Information (Details) - USD ($)	3 Months Ended	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2019	Jan. 01, 2019
Leases
Operating Lease, Right-of-Use Asset	$ 6,000,000	$ 6,000,000	$ 6,700,000
Operating Lease, Liability	6,134,000	6,134,000	$ 6,700,000
Operating Lease, Payments	442,000	1,258,000
Lease, Cost	$ 420,000	$ 1,272,000
Operating Lease, Weighted Average Remaining Lease Term	6 years 9 months 18 days	6 years 9 months 18 days
Operating Lease, Weighted Average Discount Rate, Percent	4.70%	4.70%