Investments (Tables)

12 Months Ended

Dec. 31, 2021

Investments, Debt and Equity Securities [Abstract]

Schedule of Available-for-sale Investments

The following tables summarize the Company’s debt securities classified as available-for-sale at December 31 (in thousands):

AVAILABLE-FOR-SALE INVESTMENTS
2021
(in thousands)
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
Certificates of deposit	$	1,351	$	—	$	—	$	1,351
U.S. Treasury securities	250		—		—		250
Commercial paper	8,048		—		(2)		8,046
Corporate notes and bonds	13,245		—		(13)		13,232
Total	$	22,894	$	—	$	(15)	$	22,879

AVAILABLE-FOR-SALE INVESTMENTS
2020
(in thousands)
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
Certificates of deposit	$	5,820	$	5	$	—	$	5,825
U.S. Treasury securities	5,908		15		—		5,923
Commercial paper	10,603		1		—		10,604
Corporate notes and bonds	9,779		1		(1)		9,779
Total	$	32,110	$	22	$	(1)	$	32,131

Schedule of Maturities of Available-for-sale Investments

The following table summarizes the maturities of the Company’s debt securities classified as available-for-sale at December 31 (in thousands):

AVAILABLE-FOR-SALE INVESTMENT MATURITIES
(in thousands)
	2021				2020
	Amortized Cost		Fair Value		Amortized Cost		Fair Value
Due in less than 1 year	$	22,663	$	22,649	$	32,110	$	32,131
Due in 1-5 years	231		230		—		—
Total	$	22,894	$	22,879	$	32,110	$	32,131