v3.22.2.2
Fair Value of Financial Instruments - Schedule of Fair Value Measurement (Details) - USD ($)
$ in Thousands
Sep. 30, 2022
Dec. 31, 2021
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Equity investments: $ 800 $ 800
Debt securities available-for-sale: 15,599 22,879
Certificates of deposit    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt securities available-for-sale: 3,382 1,351
U.S. Treasury securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt securities available-for-sale: 5,228 250
Commercial paper    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt securities available-for-sale: 2,893 8,046
Corporate notes and bonds    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt securities available-for-sale: 4,096 13,232
Fair Value on a Recurring Basis    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Cash and cash equivalents: 5,145 5,763
Equity investments: 808 841
Debt securities available-for-sale: 15,599 22,879
Total assets measured at fair value 21,552 29,483
Fair Value on a Recurring Basis | Quoted Prices in Active Markets for Identical Assets (Level 1)    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Cash and cash equivalents: 5,145 5,563
Equity investments: 808 841
Debt securities available-for-sale: 5,228 250
Total assets measured at fair value 11,181 6,654
Fair Value on a Recurring Basis | Significant Other Observable Inputs (Level 2)    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Cash and cash equivalents: 0 200
Equity investments: 0 0
Debt securities available-for-sale: 10,371 22,629
Total assets measured at fair value 10,371 22,829
Fair Value on a Recurring Basis | Significant Unobservable Inputs (Level 3)    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Cash and cash equivalents: 0 0
Equity investments: 0 0
Debt securities available-for-sale: 0 0
Total assets measured at fair value 0 0
Fair Value on a Recurring Basis | Mutual funds    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Equity investments: 808 841
Fair Value on a Recurring Basis | Mutual funds | Quoted Prices in Active Markets for Identical Assets (Level 1)    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Equity investments: 808 841
Fair Value on a Recurring Basis | Mutual funds | Significant Other Observable Inputs (Level 2)    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Equity investments: 0 0
Fair Value on a Recurring Basis | Mutual funds | Significant Unobservable Inputs (Level 3)    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Equity investments: 0 0
Fair Value on a Recurring Basis | Certificates of deposit    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt securities available-for-sale: 3,382 1,351
Fair Value on a Recurring Basis | Certificates of deposit | Quoted Prices in Active Markets for Identical Assets (Level 1)    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt securities available-for-sale: 0 0
Fair Value on a Recurring Basis | Certificates of deposit | Significant Other Observable Inputs (Level 2)    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt securities available-for-sale: 3,382 1,351
Fair Value on a Recurring Basis | Certificates of deposit | Significant Unobservable Inputs (Level 3)    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt securities available-for-sale: 0 0
Fair Value on a Recurring Basis | U.S. Treasury securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt securities available-for-sale: 5,228 250
Fair Value on a Recurring Basis | U.S. Treasury securities | Quoted Prices in Active Markets for Identical Assets (Level 1)    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt securities available-for-sale: 5,228 250
Fair Value on a Recurring Basis | U.S. Treasury securities | Significant Other Observable Inputs (Level 2)    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt securities available-for-sale: 0 0
Fair Value on a Recurring Basis | U.S. Treasury securities | Significant Unobservable Inputs (Level 3)    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt securities available-for-sale: 0 0
Fair Value on a Recurring Basis | Commercial paper    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt securities available-for-sale: 2,893 8,046
Fair Value on a Recurring Basis | Commercial paper | Quoted Prices in Active Markets for Identical Assets (Level 1)    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt securities available-for-sale: 0 0
Fair Value on a Recurring Basis | Commercial paper | Significant Other Observable Inputs (Level 2)    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt securities available-for-sale: 2,893 8,046
Fair Value on a Recurring Basis | Commercial paper | Significant Unobservable Inputs (Level 3)    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt securities available-for-sale: 0 0
Fair Value on a Recurring Basis | Corporate notes and bonds    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt securities available-for-sale: 4,096 13,232
Fair Value on a Recurring Basis | Corporate notes and bonds | Quoted Prices in Active Markets for Identical Assets (Level 1)    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt securities available-for-sale: 0 0
Fair Value on a Recurring Basis | Corporate notes and bonds | Significant Other Observable Inputs (Level 2)    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt securities available-for-sale: 4,096 13,232
Fair Value on a Recurring Basis | Corporate notes and bonds | Significant Unobservable Inputs (Level 3)    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt securities available-for-sale: 0 0
Fair Value on a Recurring Basis | Money market funds    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Cash and cash equivalents: 5,145 5,563
Fair Value on a Recurring Basis | Money market funds | Quoted Prices in Active Markets for Identical Assets (Level 1)    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Cash and cash equivalents: 5,145 5,563
Fair Value on a Recurring Basis | Money market funds | Significant Other Observable Inputs (Level 2)    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Cash and cash equivalents: 0 0
Fair Value on a Recurring Basis | Money market funds | Significant Unobservable Inputs (Level 3)    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Cash and cash equivalents: $ 0 0
Fair Value on a Recurring Basis | Commercial paper    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Cash and cash equivalents:   200
Fair Value on a Recurring Basis | Commercial paper | Quoted Prices in Active Markets for Identical Assets (Level 1)    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Cash and cash equivalents:   0
Fair Value on a Recurring Basis | Commercial paper | Significant Other Observable Inputs (Level 2)    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Cash and cash equivalents:   200
Fair Value on a Recurring Basis | Commercial paper | Significant Unobservable Inputs (Level 3)    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Cash and cash equivalents:   $ 0