Stock Compensation Plans, Employee Stock Purchase Plan (Details) - 2016 Amended Employee Stock Purchase Plan [Member] - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Employee Stock Purchase Plan [Abstract]
Shares authorized for issuance under plan (in shares)	310,041
Eligibility employment period required for plan participation	90 days
Purchase price of stock in percentage for participation	85.00%
Percentage of eligible employee participating in plan	39.00%
Cash contributions to ESPP	$ 96
Shares purchased for award (in shares)	10,365
Weighted average purchase price of shares purchased (in dollars per share)	$ 9.23
Compensation cost related to ESPP	$ 17	$ 22	$ 56
Maximum [Member]
Employee Stock Purchase Plan [Abstract]
Plan participation period	27 months
Percentage of employee compensation that can be withheld to purchase common stock	10.00%