Financial Instruments and Fair Value Measurements - Net Notional Principal Amounts of Outstanding Derivative Instruments (Details) - USD ($)		Dec. 31, 2020	Dec. 31, 2019
Not Designated as Hedging Instrument | Foreign Exchange-forward Contracts
Derivatives Fair Value [Line Items]
Foreign currency exchange-forward contracts	[1],[2]	$ 3,000,000	$ 10,000,000

[1] Derivative contracts address foreign currency exchange fluctuations for the Euro versus the U.S. dollar. These outstanding derivatives are not designated as hedging instruments and have an original maturity period of 90 days or less.

[2] The fair value of our outstanding derivatives as of December 31, 2020 and 2019, respectively, was not material. The notional amount of a forward contract is the contracted amount of foreign currency to be exchanged and is not recorded on the balance sheet.