FAIR VALUE MEASUREMENTS

12 Months Ended

Dec. 31, 2013

FAIR VALUE MEASUREMENTS

FAIR VALUE MEASUREMENTS

NOTE 5. FAIR VALUE MEASUREMENTS

Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. Assets and liabilities recorded at fair value are categorized using defined hierarchical levels directly related to the amount of subjectivity associated with the inputs to fair value measurements, as follows:

Level 1—Quoted prices in active markets for identical assets or liabilities;

Level 2—Inputs other than quoted prices included within Level 1 that are either directly or indirectly observable;

Level 3—Unobservable inputs in which little or no market activity exists, requiring an entity to develop its own assumptions that market participants would use to value the asset or liability.

The Company's financial instruments consist of cash and cash equivalents, accounts receivable, restricted cash and investments, accounts payable and accrued liabilities. The estimated fair value of cash and cash equivalents, accounts receivable, accounts payable and accrued liabilities approximate their carrying value due to the short-term nature of these instruments.

The Company's assets measured at fair value on a recurring basis at December 31, 2013 and 2012 consisted of our Restricted cash and investments as follows:

	2013
$s in thousands	Quoted Prices in Active Markets (Level 1)		Other Observable Inputs (Level 2)		Unobservable Inputs (Level 3)		Total
Assets:
Fixed-income securities(1)	$	399	$	3,607	$	—	$	4,006
Money market funds(2)	$	91	$	—	$	—	$	91
Total	$	490	$	3,607	$	—	$	4,097

	2012
$s in thousands	Quoted Prices in Active Markets (Level 1)		Other Observable Inputs (Level 2)		Unobservable Inputs (Level 3)		Total
Assets:
Money market funds(2)	$	4,111	$	—	$	—	$	4,111
Total	$	4,111	$	—	$	—	$	4,111

(1)

We invest a portion of our Restricted cash and investments in fixed-income securities, including U.S. Treasury and U.S. agency securities. We measure the fair value of U.S. Treasury securities using quoted prices for identical assets in active markets. We measure the fair value of U.S. agency securities using observable market activity for similar assets. The fair value of our fixed-income securities approximates our cost basis in the investments.

(2)

We invest a portion of our Restricted cash and investments in money market funds. We measure the fair value of these money market fund investments using quoted prices for identical assets in active markets.