Segment Information - Summary of Net Revenue Classified by Major Geographic Areas (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Revenues From External Customers And Long Lived Assets [Line Items]
Net revenue	$ 1,118	$ 1,374
United States [Member]
Revenues From External Customers And Long Lived Assets [Line Items]
Net revenue	1,063	1,186
All other countries [Member]
Revenues From External Customers And Long Lived Assets [Line Items]
Net revenue	$ 55	$ 188