Fair Value Measurements

6 Months Ended

Jun. 30, 2013

Fair Value Measurements

4.   FAIR VALUE MEASUREMENTS

Assets Measured at Fair Value on a Recurring Basis

Fair value is an exit price, representing the amount that would be received from the sale of an asset or paid to transfer a liability in an orderly transaction between market participants based on assumptions that market participants would use in pricing an asset or liability. As a basis for classifying the fair value measurements, a three-tier fair value hierarchy, which classifies the fair value measurements based on the inputs used in measuring fair value, was established as follows: (Level 1) observable inputs such as quoted prices in active markets for identical assets or liabilities; (Level 2) significant other observable inputs that are observable either directly or indirectly; and (Level 3) significant unobservable inputs in which there is little or no market data, which requires the Company to develop its own assumptions. This hierarchy requires the Company to use observable market data, when available, and to minimize the use of unobservable inputs when determining fair value. On a recurring basis, the Company records its marketable securities at fair value.

The Company’s investments classified within Level 1 of the fair value hierarchy are valued using quoted market prices. The Company’s investments classified within Level 2 of the fair value hierarchy are valued based on matrix pricing compiled by third party pricing vendors, using observable market inputs such as interest rates, yield curves, and credit risk. The Company does not have any investments classified within Level 3 of the fair value hierarchy.

The fair value hierarchy of the Company’s cash equivalents and marketable securities at fair value is as follows:

			Fair Value Measurements at Reporting Date Using
(in thousands)	June 30, 2013		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)
Money market funds	$	1,638	$	1,638	$	—
Marketable securities:
Municipal bonds	$	38,213	$	15,099	$	23,114
Corporate bonds		30,253		30,253		—
Certificate of deposits		1,500		—		1,500
Total marketable securities	$	69,966	$	45,352	$	24,614

			Fair Value Measurements at Reporting Date Using
(in thousands)	December 31,     2012		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)
Money market funds	$	2,873	$	2,873	$	—
Marketable securities:
Municipal bonds	$	30,526	$	11,966	$	18,560
Corporate bonds		14,934		14,934		—
Total marketable securities	$	45,460	$	26,900	$	18,560

Assets Measured at Fair Value on a Nonrecurring Basis

Assets recorded at fair value on a nonrecurring basis, such as property and equipment, and intangible assets, are recognized at fair value when they are impaired. During the first six months of 2013 and 2012, the Company did not recognize any impairments on its assets measured at fair value on a nonrecurring basis.