Cash, Cash Equivalents, and Short-Term Investments (Tables)

12 Months Ended

Dec. 31, 2016

Cash and Cash Equivalents [Abstract]

Summary of Cash, Cash Equivalents and Short-Term Investments

Cash, cash equivalents and short-term investments consisted of the following (in thousands):

	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