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Investments (Tables)

12 Months Ended

Dec. 31, 2022

Investments

Schedule of amortized cost and fair value of available-for-sale securities

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

Gross

Gross

​

​

​

Amortized

​

Unrealized

​

Unrealized

​

Estimated

​

​

Cost

​

Gains

​

Losses

​

Fair Value

​

​

(in thousands)

December 31, 2022

​

​

​

​

​

​

​

​

​

​

​

​

U.S. treasuries

​

$

63,331

​

$

—

​

$

(482)

​

$

62,849

Government agency securities

​

​

27,464

​

​

—

​

​

(98)

​

​

27,366

Corporate debt

​

​

42,006

​

​

—

​

​

(415)

​

​

41,591

Commercial paper

​

​

15,682

​

​

—

​

​

—

​

​

15,682

Total

​

$

148,483

​

$

—

​

$

(995)

​

$

147,488

​

​

​

​

​

​

​

​

​

​

​

​

​

December 31, 2021

​

​

​

​

​

​

​

​

​

​

​

​

U.S. treasuries

​

$

51,269

​

$

—

​

$

(174)

​

$

51,095

Government agency securities

​

​

12,075

​

​

—

​

​

(23)

​

​

12,052

Corporate debt

​

40,169

​

​

—

​

​

(134)

​

40,035

Commercial paper

​

​

999

​

​

—

​

​

—

​

​

999

Total

​

$

104,512

​

$

—

​

$

(331)

​

$

104,181

​

Schedule of fair value and unrealized losses of available-for-sale securities in a loss position

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​

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​

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​

December 31, 2022

​

December 31, 2021

​

​

Continuous Loss Position

​

Continuous Loss Position

​

Continuous Loss Position

​

​

for Less than 12 Months

​

for 12 Months or More

​

for Less than 12 Months

​

​

​

Gross

​

​

Gross

​

Gross

​

​

Estimated

​

Unrealized

​

Estimated

​

Unrealized

​

Estimated

​

Unrealized

​

​

Fair Value

​

Losses

​

Fair Value

​

Losses

​

Fair Value

​

Losses

​

​

​

(in thousands)

U.S. treasuries

​

$

39,791

​

$

(84)

​

$

23,057

​

$

(398)

​

$

51,095

​

$

(174)

Government agency securities

​

​

22,528

​

​

(86)

​

​

4,838

​

​

(12)

​

​

12,052

​

​

(23)

Corporate debt

​

19,693

​

(138)

​

21,898

​

(277)

​

40,035

​

(134)

Total

​

$

82,012

​

$

(308)

​

$

49,793

​

$

(687)

​

$

103,182

​

$

(331)

​

Schedule of contractual maturities of securities classified as available-for-sale

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​	​	​	​	​	​	​
​	​	December 31, 2022
​	​	Amortized		​	Estimated
​	​	Cost		​	Fair Value
​	​	​	(in thousands)
Due in one year or less	​	$	145,885	​	$	144,959
Due after one year through two years	​	​	2,598	​		2,529
Total	​	$	148,483	​	$	147,488

​

X

- Definition

Tabular disclosure of fair value of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in unrealized loss position, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 30
-Section 55
-Paragraph 8
-URI https://asc.fasb.org/extlink&oid=121590138&loc=SL82922954-210456

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 6
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27290-111563

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 30
-Section 50
-Paragraph 4
-URI https://asc.fasb.org/extlink&oid=124269663&loc=SL82922888-210455

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- Definition

Tabular disclosure of maturities of an entity's investments as well as any other information pertinent to the investments.

+ References

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- Definition

Tabular disclosure of the reconciliation of available-for-sale securities from cost basis to fair value.

+ References

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