Fair Value of Financial Instruments (Tables)

3 Months Ended

Mar. 31, 2015

Fair Value Disclosures [Abstract]

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

The following tables show assets and liabilities measured at fair value on a recurring basis as of March 31, 2015 and December 31, 2014 and the input categories associated with those assets and liabilities:

(in thousands)
As of March 31, 2015	Level 1		Level 2		Level 3
Assets:
Cash equivalents – money market funds	$	23,798	$	—	$	—
Investments – commercial paper		—		6,497		—
Investments – corporate debt securities		—		56,441		—

As of December 31, 2014	Level 1		Level 2		Level 3
Assets:
Cash equivalents – money market funds	$	33,199	$	—	$	—
Investments – commercial paper		—		6,491		—
Investments – corporate debt securities		—		81,849		—