Investments (Tables)

9 Months Ended

Sep. 30, 2015

Investments, Debt and Equity Securities [Abstract]

Schedule of amortized cost and fair value of investments, with gross unrealized gains and losses

At September 30, 2015, the amortized cost and fair value of investments, with gross unrealized gains and losses, were as follows:

			Gross		Gross
	Amortized		Unrealized		Unrealized
(in thousands)	Cost		Gains		Losses		Fair Value
Money market funds	$	7,396	$	—	$	—	$	7,396
Total investments	$	7,396	$	—	$		$	7,396
Reported as:
Cash and cash equivalents							$	7,154
Restricted cash, long-term								242
Total investments							$	7,396

At December 31, 2014, the amortized cost and fair value of investments, with gross unrealized gains and losses, were as follows:

			Gross		Gross
	Amortized		Unrealized		Unrealized
(in thousands)	Cost		Gains		Losses			Fair Value
Money market funds	$	9,663	$	—	$	—		$	9,663
Federal agency securities		13,774		—		(4	)		13,770
Commercial paper		1,499		1		—			1,500
Corporate debt securities		14,525		—		(5	)		14,520
Total investments	$	39,461	$	1	$	(9	)	$	39,453
Reported as:
Cash and cash equivalents								$	9,470
Marketable securities									29,790
Restricted cash									193
Total investments								$	39,453