Short-Term Investments

3 Months Ended

Mar. 31, 2013

Short-Term Investments [Abstract]

Short-Term Investments

7. Short-Term Investments

Short-term investments consist of U.S. government agency and government sponsored enterprise obligations. The Company accounts for these short-term investments as required by FASB ASC Topic No. 320, Investments-Debt and Equity Securities. These debt and equity securities are not classified as either held-to-maturity securities or trading securities. As such, they are classified as available-for-sale securities. Available-for-sale securities are recorded at fair value, with unrealized gains or losses recorded as a separate component of accumulated other comprehensive income in stockholders’ equity until realized. Available-for-sale securities with contractual maturities of less than 12 months were as follows (in thousands):

	March 31, 2013							December 31, 2012
	Amortized cost basis		Gross unrealized gain(loss)			Fair value		Amortized cost basis		Gross unrealized gain(loss)			Fair value
Corporate notes, bonds and paper	$	12,178	$	11		$	12,189	$	9,091	$	(7	)	$	9,084
Government securities/money market		3,325		(1	)		3,324		4,245		(1	)		4,244
Total	$	15,503	$	10		$	15,513	$	13,336	$	(8	)	$	13,328

Realized gains were zero for the three months ended March 31, 2013 and de minimis for the three months ended March 31, 2012.