Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2019

Fair Value Disclosures [Abstract]

Schedule of Assets and Liabilities Measured at Fair Value on a Recurring Basis

The following tables represent the fair value hierarchy for those assets and liabilities that the Company measures at fair value on a recurring basis (in thousands):

	Fair Value Measurements at September 30, 2019 Using:
	Total		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Assets:
Financial assets included within cash and cash equivalents
Money market funds	$	32	$	32	$	—	$	—
Short-term investments - commercial paper		21,164		—		21,164		—
Financial assets included within short-term investments
Short-term investments - certificates of deposit		10,000		—		10,000		—
Short-term investments - commercial paper		32,022		—		32,022		—
Available-for-sale investment		251		251		—		—
Total assets	$	63,469	$	283	$	63,186	$	—

	Fair Value Measurements at December 31, 2018 Using:
	Total		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Assets:
Financial assets included within cash and cash equivalents
Money market funds	$	25	$	25	$	—	$	—
Short-term investments - commercial paper		5,396		—		5,396		—
Financial assets included within short-term investments
Short-term investments - commercial paper		36,544		—		36,544		—
Short-term investments - corporate notes		16,699		—		16,699		—
Short-term investments - U.S. government bonds		3,998		—		3,998		—
Available-for-sale investment		388		388		—		—
Total assets	$	63,050	$	413	$	62,637	$	—