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Investments and Fair Value Measurements (Tables)
9 Months Ended
Sep. 30, 2022
Investments, Debt and Equity Securities [Abstract]  
Schedule of Components of Investments The components of our investments as of September 30, 2022 are as follows (in thousands):
As of September 30, 2022
Fair Value MeasurementBalance Sheet Classification
Fair Value LevelCost BasisUnrealized Gains (Losses)Market ValueCash and Cash EquivalentsShort-term Investments and Marketable Securities
Money market fundLevel 1$149 $— $149 $149 $— 
U.S. TreasuriesLevel 117,985 (70)17,915 — 17,915 
Commercial paperLevel 213,134 — 13,134 — 13,134 
Corporate bondsLevel 29,923 (87)9,836 — 9,836 
Total investments$41,191 $(157)$41,034 $149 $40,885 

At December 31, 2021, our investments consisted of the following (in thousands):

As of December 31, 2021
Fair Value MeasurementBalance Sheet Classification
Fair Value LevelCost BasisUnrealized Gains (Losses)Market ValueCash and Cash EquivalentsShort-term Investments and Marketable SecuritiesLong-term Investments
Money market fundLevel 1$38,301 $— $38,301 $38,301 $— $— 
U.S. Treasury bondsLevel 18,171 — 8,171 — 8,171 — 
Commercial paperLevel 223,312 — 23,312 — 23,312 — 
Corporate bondsLevel 220,107 (14)20,093 — 8,049 12,044 
Asset-backed securitiesLevel 215,655 (8)15,647 — 15,647 — 
Total investments$105,546 $(22)$105,524 $38,301 $55,179 $12,044 
Schedule of Amortized Cost Basis and Fair Value of Debt Securities by Contractual Maturity
The amortized cost basis and fair value of debt securities as of September 30, 2022, by contractual maturity, are as follows (in thousands):

As of September 30, 2022
Cost BasisFair Value
Due in one year or less$41,191 $41,034 
Due after one year through five years— — 
Total investments$41,191 $41,034