Investments (Tables)

3 Months Ended

Mar. 31, 2017

Investments [Abstract]

Schedule of financial assets measured at fair value on recurring basis

	Level 1		Level 2		Level 3		Total
	(in thousands)
Cash equivalents:
Money market funds	$	10,960	$	—	$	—	$	10,960

	Level 1		Level 2		Level 3		Total
	(in thousands)
Cash equivalents:
Money market funds	$	10,949	$	—	$	—	$	10,949