Summary of Significant Accounting Policies - Summary of Allowance for Sales Returns (Details) - Allowance for Sales Returns and Price Exceptions - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Valuation And Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Year	$ 1,072	$ 373	$ 3,495
Additional Reserve	1,109	2,939	1,426
Applied Sales Return	(1,775)	(2,240)	(4,548)
Balance at End of Year	$ 406	$ 1,072	$ 373