Fair Value of Financial Instruments (Tables)

12 Months Ended

Dec. 31, 2021

Fair Value Disclosures [Abstract]

Schedule of Fair Value Measurement

The following tables represent the financial instruments measured at fair value on a recurring basis on the financial statements of the Company and the valuation approach applied to each class of financial instruments at December 31 (see Note 2, Summary of Significant Accounting Policies for further information):

	2021
	(in thousands)
	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total
Assets:
Cash and cash equivalents:
Money market funds	$	5,563	$	—	$	—	$	5,563
Commercial paper	—		200		—		200
Total cash and cash equivalents	5,563		200		—		5,763
Equity investments:
Mutual funds	841		—		—		841
Total equity investments	841		—		—		841
Debt securities available-for-sale:
Certificates of deposit	—		1,351		—		1,351
US Treasury securities	250		—		—		250
Commercial paper	—		8,046		—		8,046
Corporate notes and bonds	—		13,232		—		13,232
Total debt securities available-for-sale	250		22,629		—		22,879
Total assets measured at fair value	$	6,654	$	22,829	$	—	$	29,483

	2020
	(in thousands)
	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total
Assets:
Cash and cash equivalents:
Money market funds	$	19,276	$	—	$	—	$	19,276
Commercial paper	—		885		—		885
Total cash and cash equivalents	19,276		885		—		20,161
Equity investments:
Mutual funds	357		—		—		357
Total equity investments	357		—		—		357
Debt securities available-for-sale:
Certificates of deposit	—		5,825		—		5,825
US Treasury securities	5,923		—		—		5,923
Commercial paper	—		10,604		—		10,604
Corporate notes and bonds	—		9,779		—		9,779
Total debt securities available-for-sale	5,923		26,208		—		32,131
Total assets measured at fair value	$	25,556	$	27,093	$	—	$	52,649