Cash and Investments (Tables)

6 Months Ended

Jun. 30, 2022

Cash and Cash Equivalents [Abstract]

Short-term Investments

Short-term investments consisted of the following:

	June 30, 2022
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value
Short-term investments:
Pooled bond funds	$	20,187	$	—	$	(280	)	$	19,907
Total short-term investments	$	20,187	$	—	$	(280	)	$	19,907

	December 31, 2021
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value
Short-term investments:
Pooled bond and money market funds	$	20,090	$	—	$	(14	)	$	20,076
Total short-term investments	$	20,090	$	—	$	(14	)	$	20,076