Loss per Share - Outstanding Options and Warrants (Details) - shares shares in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Employee Stock Option [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	3,100	2,500
Warrant [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	39	0
Employee Stock Option [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	3,088	2,498