Cash and Investments (Tables)

3 Months Ended

Mar. 31, 2020

Cash And Cash Equivalents [Abstract]

Cash

Cash consisted of the following:

	March 31, 2020		December 31, 2019
Cash	$	40,279	$	52,487
Total cash	$	40,279	$	52,487

Short-term Investments

Short-term investments consisted of the following:

	March 31, 2020
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value
Short-term investments:
Bond funds	$	5,056	$	—	$	(169	)	$	4,887
Total short-term investments	$	5,056	$	—	$	(169	)	$	4,887

	December 31, 2019
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value
Short-term investments:
Bond funds	$	5,012	$	—	$	—	$	5,012
Total short-term investments	$	5,012	$	—	$	—	$	5,012