Leases - Other (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Leases
Operating right-of-use assets	$ 2,100,000		$ 2,100,000
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	Property, Plant and Equipment, Net		Property, Plant and Equipment, Net
Operating lease liabilities	$ 2,099,000		$ 2,099,000		$ 2,224,000
Weighted-average remaining lease term (in years)	8 years		8 years
Weighted-average discount rate (as a percent)	4.00%		4.00%
Operating lease cost	$ 80,000	$ 84,000	$ 166,000	$ 116,000
Short-term operating lease expense	$ 25,000	$ 18,000	$ 60,000	$ 51,000
Minimum
Leases
Remaining lease terms (in years)			1 year
Maximum
Leases
Remaining lease terms (in years)			10 years