Cash and Cash Equivalents

9 Months Ended

Sep. 30, 2017

Cash and Cash Equivalents [Abstract]

Cash and Cash Equivalents

2. Cash and Cash Equivalents

Cash and cash equivalents consisted of the following (in thousands):

	September 30, 2017
	Amortized Cost		Unrealized Gain		Unrealized (Loss)		Estimated Fair Value
Cash	$	202	$	—	$	—	$	202
Money market funds		1,706		—		—		1,706
	$	1,908	$	—	$	—	$	1,908

	December 31, 2016
	Amortized Cost		Unrealized Gain		Unrealized (Loss)		Estimated Fair Value
Cash	$	671	$	—	$	—	$	671
Money market funds		2,864		—		—		2,864
U.S. government treasury bills		3,008		—		—		3,008
Corporate bonds and commercial paper		5,504		—		—		5,504
	$	12,047	$	—	$	—	$	12,047

Reported as:
Cash and cash equivalents	$	3,535
Short-term investments		8,512
Total cash, cash equivalents and short-term investments	$	12,047