Net Loss Per Share (Details) - shares shares in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Amount of weighted-average anti-dilutive common shares	12,483	1,734	12,529	1,484
Employee Stock Option
Amount of weighted-average anti-dilutive common shares	898	1,124	944	894
Warrant
Amount of weighted-average anti-dilutive common shares	8,342	277	8,342	257
Convertible loans
Amount of weighted-average anti-dilutive common shares	3,243	333	3,243	333