Prepaid Expenses and Other Current Assets and Accrued and Other Current Liabilities Accrued and Other Current Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Other Current Assets And Other Current Liabilities [Abstract]
Payroll and related costs	$ 6,566	$ 8,106
Bookings Commitment	1,625	1,122
Securities litigation expense payable	242	17,127
Interest payable	1,619	274
Operating lease liabilities	1,703	1,617
Other accrued and other current liabilities	3,078	3,742
Accrued and other current liabilities	$ 14,833	$ 31,988