Finance Obligation - Other information related to finance obligations (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Other information
Cash payments	$ 433,000	$ 78,000
Weighted average remaining lease term (years)	5 years 1 month 6 days	7 years 6 months 3 days
Weighted average discount rate	7.20%	8.80%
Finance obligation
Other information
Cash payments	$ 12,816	$ 9,879
Weighted average remaining lease term (years)	4 years 10 months 24 days	4 years 3 months 18 days
Weighted average discount rate	11.20%	11.10%