Summary of Significant Accounting Policies - Schedule of Rollforward of Sales Return Liability (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($)
Accounting Policies [Abstract]
Balance as of December 31, 2018	$ 6,048
Addition to reserve for sales activity	105,496
Actual returns	(104,148)
Change in estimate of sales returns	720
Balance as of December 31, 2019	$ 8,116