Select Balance Sheet and Statement of Operations Information - Schedule of Finance Expenses (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Interest And Debt Expense [Abstract]
Interest expense	$ 930	$ 2,220	$ 2,068	$ 4,328
Accretion on long-term debt and amortization of fees	231	151	978	297
Total finance expenses	$ 1,161	$ 2,371	$ 3,046	$ 4,625