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Fair Value Measurement of Assets and Liabilities | 3 Months Ended
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Mar. 31, 2016
Fair Value Disclosures [Abstract] |
Fair Value Measurement of Assets and Liabilities | Fair Value Measurement of Assets and Liabilities 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 (exit price). A fair value measurement reflects the assumptions market participants would use in pricing an asset or liability based on the best available information. These assumptions include the risk inherent in a particular valuation technique (such as a pricing model) and the risks inherent in the inputs to the model. The Company classifies inputs to measure fair value using a three-level hierarchy that maximizes the use of observable inputs and minimizes the use of unobservable inputs by requiring that the most observable inputs be used when available. The categorization of financial instruments within the valuation hierarchy is based upon the lowest level of input that is significant to the fair value measurement. The hierarchy is prioritized into three levels (with Level 3 being the lowest) and is defined as follows:
Level 1: | Pricing inputs are based on quoted market prices for identical assets or liabilities in active markets (e.g., NYSE or NASDAQ). Active markets are those in which transactions for the asset or liability occur in sufficient frequency and volume to provide pricing information on an ongoing basis.
Level 2: | Pricing inputs include benchmark yields, trade data, reported trades and broker dealer quotes, two-sided markets and industry and economic events, yield to maturity, Municipal Securities Rule Making Board reported trades and vendor trading platform data. Level 2 includes those financial instruments that are valued using various pricing services and broker pricing information including Electronic Communication Networks and broker feeds.
Level 3: | Pricing inputs include significant inputs that are generally less observable from objective sources, including the Company’s own assumptions.
The Company reviews the fair value hierarchy classification on a quarterly basis. Changes in the observability of valuation inputs may result in a reclassification of levels for certain securities within the fair value hierarchy. There have been no transfers of assets or liabilities between fair value measurement classifications during the three months ended March 31, 2016. The following table summarizes the Company’s financial instruments measured at fair value on a recurring basis in accordance with the authoritative guidance for fair value measurements as of March 31, 2016 (in thousands):
|  | Balance as of March 31, 2016 |  | Level 1
Assets: |  |  |  |
Cash equivalents |  |  |  |
Money market funds |  | $ | 35 |  |  | $ | 35 |
Total cash equivalents |  | 35 |  |  | 35 |
Short-term investments |  | 1,100 |  |  | 1,100 |
Total assets at fair value |  | $ | 1,135 |  |  | $ | 1,135 |
The following table summarizes the Company’s financial instruments measured at fair value on a recurring basis in accordance with the authoritative guidance for fair value measurements as of December 31, 2015 (in thousands):
|  | Balance as of December 31, 2015 |  | Level 1
Assets: |  |  |  |
Cash equivalents |  |  |  |
Money market funds |  | $ | 35 |  |  | $ | 35 |
Total cash equivalents |  | 35 |  |  | 35 |
Short-term investments |  | 1,267 |  |  | 1,267 |
Total assets at fair value |  | $ | 1,302 |  |  | $ | 1,302 |
Other Financial Instruments The Company’s financial assets and liabilities are carried at fair value or at amounts that, because of their short-term nature, approximate current fair value, with the exception of its $120.0 million in 5.50% convertible senior notes due on June 15, 2020 (the “Convertible Notes”) (see Note 6). The Company carries its Convertible Notes at amortized cost. The debt and equity components of the Convertible Notes were measured using Level 3 inputs and are not measured on a recurring basis. The fair value of the liability component of the Convertible Notes, which approximated its carrying value on the valuation date due to the recent issuance of such Convertible Notes, was $84.6 million as of March 31, 2016.

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- Definition The entire disclosure of the fair value measurement of assets and liabilities, which includes financial instruments measured at fair value that are classified in shareholders' equity, which may be measured on a recurring or nonrecurring basis. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19279-110258 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19190-110258 + Details
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