Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2018

Fair Value Disclosures [Abstract]

Schedule of Assets Measured at Fair Value on Recurring Basis

The following table sets forth by level within the fair value hierarchy the Company's financial assets that were accounted for at fair value on a recurring basis as of September 30, 2018, and December 31, 2017 (in thousands).

	September 30, 2018								December 31, 2017
	Level 1		Level 2		Level 3		Total		Level 1		Level 2		Level 3		Total
Assets:
Marketable securities - available for sale	$	—	$	31,776	$	—	$	31,776	$	—	$	25,917	$	—	$	25,917
	$	—	$	31,776	$	—	$	31,776	$	—	$	25,917	$	—	$	25,917