Marketable Securities

12 Months Ended

Dec. 31, 2014

Investments Debt And Equity Securities [Abstract]

Marketable Securities

5. Marketable Securities

Available-for-sale marketable securities at December 31, 2014 were:

	Amortized		Gross		Gross			Estimated
	Cost		Unrealized		Unrealized			Fair
	Basis		Gains		Losses			Value
Corporate bonds	$	21,748	$	6	$	(50	)	$	21,704
Mortgage-backed and asset-backed securities		1,226		—		(3	)		1,223
Agency bonds		300		—		(1	)		299
Total marketable securities	$	23,274	$	6	$	(54	)	$	23,226

The estimated fair values of available-for-sale marketable securities by contractual maturity at December 31, 2014 were:

	Fair Value
Due within 1 year or less	$	7,483
Due after 1 through 5 years		14,520
Mortgage-backed securities not due in a single maturity date		1,223
	$	23,226

Available-for-sale marketable securities at December 31, 2013 were:

	Amortized		Gross		Gross			Estimated
	Cost		Unrealized		Unrealized			Fair
	Basis		Gains		Losses			Value
Corporate bonds	$	18,798	$	41	$	(6	)	$	18,833
Mortgage-backed and asset-backed securities		1,170		1		—			1,171
Total marketable securities	$	19,968	$	42	$	(6	)	$	20,004

The estimated fair values of available-for-sale marketable securities by contractual maturity at December 31, 2013 were:

	Fair Value
Due within 1 year or less	$	6,248
Due after 1 through 5 years		13,449
Mortgage-backed securities not due in a single maturity date		307
	$	20,004