Commitments and Contingencies - Litigation and Related Contingencies and purchase commitments (Details)			12 Months Ended
	Sep. 25, 2019 product	Jun. 16, 2019 USD ($)	Dec. 31, 2019 USD ($)	Mar. 31, 2020 USD ($)
Governmental Investigations
Number of product category | product	1
Accruals for potential contingencies			$ 0	$ 0
Governmental Investigations | Legal | Korea
Governmental Investigations
Fine amount to be imposed		$ 20,000
Percentage of sales to customers on revenue			3.00%