Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2019

Fair Value Disclosures [Abstract]

Assets and Liabilities Measured at Fair Value on Recurring Basis

Assets and liabilities measured at fair value on a recurring basis were as follows (in thousands):

	December 31, 2019
	Quoted Prices in Active Markets for Identical Assets (Level 1)		Direct or Indirect Observable Inputs (Level 2)		Total
Assets
Cash equivalents:
Money market funds	$	1,871	$	-	$	1,871
Corporate commercial paper		-		999		999
Corporate debt		-		750		750
Total cash equivalents		1,871		1,749		3,620
Restricted cash:
Money market funds		600		-		600
Short-term investments:
Corporate commercial paper		-		748		748
Corporate debt		-		1,501		1,501
Total short-term investments		-		2,249		2,249
Total assets measured at fair value	$	2,471	$	3,998	$	6,469
	December 31, 2018
	Quoted Prices in Active Markets for Identical Assets (Level 1)		Direct or Indirect Observable Inputs (Level 2)		Total
Assets
Cash equivalents:
Money market funds	$	1,277	$	-	$	1,277
Corporate commercial paper		-		1,198		1,198
Corporate debt		-		750		750
Total cash equivalents		1,277		1,948		3,225
Restricted cash:
Money market funds		526		-		526
Short-term investments:
Corporate commercial paper		-		3,874		3,874
Corporate debt		-		2,535		2,535
Total short-term investments		-		6,409		6,409
Total assets measured at fair value	$	1,803	$	8,357	$	10,160