Leases, Information Related to Operating Leases (Details) - USD ($) $ in Thousands	6 Months Ended		12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Cash Paid for Amounts Included in the Measurement of Lease Liabilities [Abstract]
Operating Cash Flow from Operating Leases	$ 395	$ 393	$ 783
Right-of-Use Assets Obtained in Exchange for New Operating Lease Liabilities	$ 0	$ 5,645	$ 5,645
Weighted-Average Remaining Lease Term - Operating Leases	7 years 5 months 23 days	8 years 3 months 18 days	7 years 10 months 17 days
Weighted-Average Discount Rate - Operating Leases	3.20%	3.20%	3.20%