Cash, Cash Equivalents and Investments (Tables)

12 Months Ended

Dec. 31, 2021

Fair Value Disclosures [Abstract]

Summary of Fair Values of Cash, Cash Equivalents, and Short-Term Investments Measured at Fair Value on Recurring Basis

The following tables categorize the fair values of cash, cash equivalents, short-term investments and long-term investments measured at fair value on a recurring basis on our balance sheets (in thousands):

	December 31,
	2021		2020
Cash and cash equivalents:
Cash	$	40,270	$	35,690
Money market funds		15,954		15,661
Repurchase agreements		13,500		15,000
Certificates of deposit		—		490
Total cash and cash equivalents	$	69,724	$	66,841
Short-term investments:
Certificates of deposit	$	6,928	$	23,387
Municipal notes		1,283		2,365
Corporate notes		25,675		34,991
Government and agency notes		3,192		6,236
Total short-term investments	$	37,078	$	66,979
Long-term investments
Corporate notes	$	12,722	$	40,435
Certificates of deposit		4,575		6,888
Municipal notes		650		1,081
Government and agency notes		1,986		2,060
Total long-term investments	$	19,933	$	50,464

Summary of Available-for-Sale Securities

The following table summarizes the available-for-sale securities (in thousands):

	Fair Value Measurements at December 31, 2021
	Amortized Cost		Unrealized Gains		Unrealized Losses			Fair Value
Money market funds	$	15,954	$	—	$	—		$	15,954
Certificates of Deposit		11,511		12		(20	)		11,503
Repurchase Agreements		13,500		—		—			13,500
Corporate notes		38,470		6		(79	)		38,397
Government and agency notes		5,195		—		(17	)		5,178
Municipal notes		1,934		—		(1	)		1,933
Total cash equivalents and investments	$	86,564	$	18	$	(117	)	$	86,465
Classified as:
Cash equivalents (maturities within 90 days)								$	29,454
Short-term investments (maturities within one year)									37,078
Long-term investments (maturities beyond 1 year)									19,933
Total cash equivalents and investments								$	86,465

	Fair Value Measurements at December 31, 2020
	Amortized Cost		Unrealized Gains		Unrealized Losses			Fair Value
Money market funds	$	15,661	$	—	$	—		$	15,661
Certificates of Deposit		30,603		162		—			30,765
Repurchase Agreements		15,000		—		—			15,000
Corporate notes		75,298		183		(55	)		75,426
Government notes		8,274		22		—			8,296
Commercial Paper		3,445		1		—			3,446
Total cash equivalents and investments	$	148,281	$	368	$	(55	)	$	148,594
Classified as:
Cash equivalents (maturities within 90 days)								$	31,151
Short-term investments (maturities within one year)									66,979
Long-term investments (maturities beyond 1 year)									50,464
Total cash equivalents and investments								$	148,594