XML 22 R11.htm IDEA: XBRL DOCUMENT v3.21.2
Investments
 9 Months Ended
Sep. 30, 2021
Investments, Debt and Equity Securities [Abstract]  
Investments

3. Investments

The amortized cost and estimated fair value of investments, by contractual maturity are as follows:

 

 

 

September 30, 2021

 

(in thousands)

 

Amortized Cost

 

 

Gross Unrealized Holding Gains

 

 

Gross Unrealized Holding Losses

 

 

Fair Value

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Maturing in one year or less

 

 

 

 

 

 

 

 

 

 

 

 

Corporate debt

 

$

1,406

 

 

$

—

 

 

$

—

 

 

$

1,406

 

U.S. Treasuries

 

 

10,173

 

 

 

—

 

 

 

—

 

 

 

10,173

 

Maturing after one year through five years

 

 

 

 

 

 

 

 

 

 

 

 

Corporate debt

 

 

6,439

 

 

 

—

 

 

 

—

 

 

 

6,439

 

U.S. Treasuries

 

 

64,916

 

 

 

—

 

 

 

—

 

 

 

64,916

 

Total

 

$

82,934

 

 

$

—

 

 

$

—

 

 

$

82,934