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FAIR VALUE MEASUREMENTS
3 Months Ended
Mar. 31, 2022
Fair Value Disclosures [Abstract]  
FAIR VALUE MEASUREMENTS FAIR VALUE MEASUREMENTS
Investments
The following table provides details regarding the Company’s short-term investments:
(in thousands)Amortized CostGross Unrealized GainsGross Unrealized LossesFair Value
March 31, 2022
Money market funds$30,758 $— $— $30,758 
U.S. treasury securities27,358 (252)27,107 
U.S. corporate paper and bonds113,562 — (639)112,923 
International corporate bond holdings4,585 — (45)4,540 
Total$176,263 $$(936)$175,328 
December 31, 2021
Money market funds$42,199 $— $— $42,199 
U.S. treasury securities22,215 — (54)22,161 
U.S. corporate paper and bonds128,005 (94)127,917 
International corporate bond holdings4,603 — (15)4,588 
Total$197,022 $$(163)$196,865 
The money market funds above are included in cash and cash equivalents on the Company’s condensed consolidated balance sheets.

As of March 31, 2022, the Company considers the unrealized losses in its investment portfolio to be temporary in nature and not due to credit losses. The Company has the intent and ability to hold such investments until their recovery at fair value. The Company had zero and $4 thousand in realized gains in its available for sale securities during the three months ended March 31, 2022 and 2021, respectively. The contractual maturity dates of all of the Company’s investments are all less than 24 months.

Fair Value Measurements

The following tables summarize the Company’s assets and liabilities that are measured at fair value on a recurring basis:
(in thousands)Quoted Prices in Active Markets
(Level 1)
Significant Other Observable Inputs
 (Level 2)
Significant Unobservable Inputs
(Level 3)
Total
March 31, 2022
Assets:
Cash equivalents:
Money market funds$30,758 $— $— $30,758 
Short-term investments:
U.S. treasury securities— 27,109 — 27,109 
U.S. corporate paper and bonds— 112,923 — 112,923 
International corporate bond holdings— 4,538 — 4,538 
Total cash equivalents and short-term investments$30,758 $144,570 $— $175,328 
December 31, 2021
Assets:
Cash equivalents:
Money market funds$42,199 $— $— $42,199 
Short-term investments:
U.S. treasury securities— 22,161 — 22,161 
U.S. corporate paper and bonds— 127,917 — 127,917 
International corporate bond holdings— 4,588 — 4,588 
Total cash equivalents and short-term investments$42,199 $154,666 $— $196,865