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Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 2012

Assets measured at fair value on recurring basis

The following tables present our money market funds and auction rate securities measured at fair value on a recurring basis as of June 30, 2012 and December 31, 2011, classified by valuation hierarchy:

			Fair Value Measurements at June 30, 2012
Investment Type	Balance at June 30, 2012		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)

Money market funds	$	43,194	$	43,194	$	-	$	-
Auction rate securities		3,240		-		-		3,240
Total	$	46,434	$	43,194	$	-	$	3,240

			Fair Value Measurements at December 31, 2011
Investment Type	Balance at December 31, 2011		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)

Money market funds	$	64,068	$	64,068	$	-	$	-
Auction rate securities		3,332		-		-		3,332
Total	$	67,400	$	64,068	$	-	$	3,332

Summary of activities in financial instruments with Level 3 inputs

For those of our financial instruments with significant Level 3 inputs (all of which are auction rate securities), the following table summarizes the activities for the three and six months ended June 30, 2012 and 2011:

	Fair Value Measurements Using Significant Unobservable Inputs (Level 3) For the Three Months Ended June 30,
Description	2012		2011

Balance at beginning of period	$	3,240	$	3,608
Transfers into Level 3		-		-
Transfers out of Level 3		-		-
Total gains (losses)
Included in net loss		-		-
Included in other comprehensive loss		-		8
Settlements at par		-		(100	)
Balance at end of period	$	3,240	$	3,516
Changes in unrealized gains or losses for the period included in earnings (or changes in net assets) for assets held at the end of the reporting period	$	-	$	-

	Fair Value Measurements Using Significant Unobservable Inputs (Level 3) For the Six Months Ended June 30,
Description	2012			2011

Balance at beginning of period	$	3,332		$	3,608
Transfers into Level 3		-			-
Transfers out of Level 3		-			-
Total gains (losses)
Included in net loss		-			-
Included in other comprehensive loss		8			8
Settlements at par		(100	)		(100	)
Balance at end of period	$	3,240		$	3,516
Changes in unrealized gains or losses for the period included in earnings (or changes in net assets) for assets held at the end of the reporting period	$	-		$	-

- Definition

Tabular disclosure of assets, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, by class that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3).

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- Definition

Tabular disclosure of the fair value measurement of assets using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes during the period attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets) and gains or losses recognized in other comprehensive income (loss), and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issues, and settlements (each type disclosed separately); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs), by class of asset.

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