Short-term and Long-term Debt - Chang Hwa Bank Narrative (Details) - Chang Hwa Bank Credit Facility - Chang Hwa Bank	Dec. 31, 2021 USD ($)	Oct. 05, 2021 USD ($) contract	Oct. 05, 2021 TWD ($) contract
Short-term Debt [Line Items]
Loan contracts | contract		3	3
Revolving Credit Facility | Line of Credit
Short-term Debt [Line Items]
Credit facility, maximum borrowing capacity	$ 36,200,000	$ 36,000,000	$ 1,000,000,000
Interest rate (as a percent)	0.80%
Revolving Credit Facility | Draw Down Instruments
Short-term Debt [Line Items]
Credit facility, maximum borrowing capacity | $		$ 20,000,000