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Financial Instruments (Tables)
9 Months Ended
Sep. 30, 2022
Financial Instruments [Abstract]  
Summary of Assets and Liabilities Measured at Fair Value on a Recurring Basis

September 30, 2022

December 31, 2021

Level 1

Level 2

Level 3

Total

Level 1

Level 2

Level 3

Total

Assets

Cash and cash equivalents

$

63,154 

$

241,279 

$

$

304,433 

$

327,315 

$

133,410 

$

$

460,725 

Investments:

Commercial paper

57,408 

57,408 

187,632 

187,632 

Corporate debt securities

49,478 

49,478 

8,968 

8,968 

U.S. government & agency securities

423,021 

423,021 

387,075 

387,075 

Total investments

529,907 

529,907 

583,675 

583,675 

Short-term restricted cash

300 

300 

500 

500 

Long-term restricted cash

2,922 

2,922 

4,592 

4,592 

Total assets measured at fair value

$

66,376 

$

771,186 

$

$

837,562 

$

332,407 

$

717,085 

$

$

1,049,492 

Liabilities

Contingent consideration

$

$

$

167,496 

$

167,496 

$

$

$

169,717 

$

169,717 

Total liabilities measured at fair value

$

$

$

167,496 

$

167,496 

$

$

$

169,717 

$

169,717 

Changes in the estimated fair value of contingent consideration liabilities

Level 3

Beginning balance as of December 31, 2021

$

169,717 

Change in estimated fair value

(2,221)

Ending balance as of September 30, 2022

$

167,496 

Summary of Cash, Cash Equivalents and Investments

As of September 30, 2022

Gross

Gross

Amortized

unrealized

unrealized

Fair

Cost

gains

losses

Value

Cash and cash equivalents

304,480

(47)

304,433 

Investments:

Commercial paper

57,713

(305)

57,408 

Corporate debt securities

50,098 

2 

(622)

49,478 

U.S. government & agency securities

428,309 

(5,288)

423,021 

Total investments

536,120

2 

(6,215)

529,907 

Total cash, cash equivalents and investments

$

840,600

$

2 

$

(6,262)

$

834,340 

Short-term restricted cash

$

300 

$

$

$

300 

Long-term restricted cash

$

2,922 

$

$

$

2,922 

As of December 31, 2021

Gross

Gross

Amortized

unrealized

unrealized

Fair

Cost

gains

losses

Value

Cash and cash equivalents

460,731 

(5)

460,725 

Investments:

Commercial paper

187,705 

(73)

187,632 

Corporate debt securities

8,964 

9 

(5)

8,968 

U.S. government & agency securities

388,088 

1 

(1,014)

387,075 

Total investments

584,757 

10 

(1,092)

583,675 

Total cash, cash equivalents and investments

$

1,045,488 

$

10 

$

(1,097)

$

1,044,400 

Short-term restricted cash

$

500 

$

$

$

500 

Long-term restricted cash

$

4,592 

$

$

$

4,592 

Summary of Contractual Maturities of Cash Equivalents and Available-for-Sale Investments

Fair Value

Due in one year or less

$

670,316

Due after one year through five years

100,870

Total investments

$

771,186