Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation - Schedule of Stock-based Compensation Expense Recorded in Operating Expenses (Details)

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Stock-Based Compensation - Schedule of Stock-based Compensation Expense Recorded in Operating Expenses (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]        
Stock-based compensation in operating expenses $ 946 $ 6,640 $ 1,907 $ 13,869
Selling, General and Administrative [Member]        
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]        
Stock-based compensation in operating expenses 843 6,364 1,705 12,683
Research and Development [Member]        
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]        
Stock-based compensation in operating expenses $ 103 $ 276 $ 202 $ 1,186