Commitments, Contingencies and Other Items (Details) plaintiff in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2021 USD ($) patent	Jun. 30, 2021 USD ($) plaintiff
Loss Contingencies [Line Items]
Estimate of possible loss | $	$ 19,000,000	$ 19,000,000
Loss Contingency, Patents Allegedly Infringed, Number | patent	1
Unfavorable Regulatory Action
Loss Contingencies [Line Items]
Estimate of possible loss | $	$ 300,000	$ 300,000
Minnesota Consumer Class Actions | U.S. District Court for the District of Minnesota
Loss Contingencies [Line Items]
Loss Contingency, Number Of Plaintiffs Elected To Opt Out | plaintiff		12
Number of potential class members | plaintiff		11