Investments and Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2014

Investments and Fair Value Measurements [Abstract]

Our cash, cash equivalents and investments are classified as follows (in thousands):

	March 31, 2014									December 31, 2013
			Gross		Gross							Gross		Gross
	Amortized		Unrealized		Unrealized			Fair		Amortized		Unrealized		Unrealized			Fair
	Cost		Gain		(Loss)			Value		Cost		Gain		(Loss)			Value
Classified as:
Cash	$	21,638	$	—	$	—		$	21,638	$	24,852	$	—	$	—		$	24,852
Cash equivalents:
Money market fund		1,122		—		—			1,122		109		—		—			109
Total cash and cash equivalents		22,760		—		—			22,760		24,961		—		—			24,961

Investments (available for sale):
Certificates of deposit		7,864		1		(2	)		7,863		6,320		2		(4	)		6,318
Corporate bonds		14,155		12		(2	)		14,165		14,276		8		(6	)		14,278
Corporate equity security		125		1,900		—			2,025		125		1.923		—			2,048
Total investments		22,144		1,913		(4	)		24,053		20,721		1,933		(10	)		22,644
Total cash, cash equivalents and investments	$	44,904	$	1,913	$	(4	)	$	46,813	$	45,682	$	1,933	$	(10	)	$	47,605
Contractual maturities on investments:
Due within 1 year	$	20,464						$	22,375	$	10,569						$	12,499
Due after 1 through 5 years		1,680							1,678		10,152							10,145
	$	22,144						$	24,053	$	20,721						$	22,644

Fair value and gross unrealized losses related to available-for-sale securities

The following table summarizes the fair value and gross unrealized losses related to available-for-sale securities, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position as of March 31, 2014 (in thousands):

	In Loss Position < 12 months									In Loss Position > 12 months									Total In Loss Position
					Gross										Gross							Gross
	Fair				Unrealized					Fair					Unrealized				Fair			Unrealized
	Value				(Loss)					Value					(Loss)				Value			(Loss)
Investments:
Certificates of deposit			$	1,918			$	(1	)			$	1,239			$	(1	)		$	3,157		$	(2	)
Corporate bonds		—		—		2,382		(2	)		2,382		(2	)
Total in loss position			$	1,918			$	(1	)			$	3,621			$	(3	)		$	5,539		$	(4	)

	In Loss Position < 12 months										In Loss Position > 12 months									Total In Loss Position
						Gross										Gross							Gross
	Fair					Unrealized					Fair					Unrealized				Fair			Unrealized
	Value					(Loss)					Value					(Loss)				Value			(Loss)
Investments:
Certificates of deposit			$	3,425				$	(4	)			$	720			$	(0	)		$	4,145		$	(4	)
Corporate bonds		4,473		(5	)		3,711		(1	)		8,184		(6	)
Total in loss position			$	7,898				$	(9	)			$	4,431			$	(1	)		$	12,329		$	(10	)

Summary of financial assets and liabilities measured at fair value on a recurring basis

The following table summarizes our financial assets and liabilities measured at fair value on a recurring basis in accordance with ASC 820 as of March 31, 2014 (in thousands):

	Balance as of March 31, 2014		Quoted Prices in Active Markets of Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)
Assets:
Cash equivalents and investments:
Money market fund	$	1,122	$	1,122	$	—
Certificates of deposit		7,863		—		7,863
Corporate bonds		14,165		—		14,165
Corporate equity securities		2,025		2,025		—
Total	$	25,175	$	3,147	$	22,028
Liabilities	$	—	$	—	$	—

The following table summarizes our financial assets and liabilities measured at fair value on a recurring basis in accordance with ASC 820 as of December 31, 2013 (in thousands):

	Balance as of December 31, 2013		Quoted Prices in Active Markets of Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)
Assets:
Cash equivalents and investments:
Money market fund	$	109	$	109	$	—
Certificates of deposit		6,318		—		6,318
Corporate bonds		14,278		—		14,278
Corporate equity securities		2,048		2,048		—
Total	$	22,753	$	2,157	$	20,596
Liabilities	$	—	$	—	$	—