Selling, General and Administrative Expense - Schedule of Selling, General and Administrative Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Non-cash expenses:
Bad debt provision			$ 1,679	$ 266
Stock based compensation			1,246	2,233
Total SG&A expense	$ 13,726	$ 9,455
Selling, General and Administrative Expenses
Cash expenses:
Compensation and benefits	3,720	2,154	7,690	11,384
Professional services	6,147	2,934	9,684	6,723
Other	2,100	3,381	4,409	6,626
Total cash SG&A expense	11,967	8,469	21,783	24,733
Non-cash expenses:
Bad debt provision	1,624	262	1,679	266
Stock based compensation	135	724	1,035	1,792
Total non-cash SG&A expense	1,759	986	2,714	2,058
Total SG&A expense	$ 13,726	$ 9,455	$ 24,497	$ 26,791