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Fair Value Measurements | 3 Months Ended
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Apr. 30, 2015
Fair Value Disclosures [Abstract] |
Fair Value Measurements | Note 3. Fair Value Measurements We define fair value as the exchange price that would be received from selling an asset or paid to transfer a liability in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. We measure our financial assets and liabilities at fair value at each reporting period using a fair value hierarchy which requires us to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. A financial instrument’s classification within the fair value hierarchy is based upon the lowest level of input that is significant to the fair value measurement. Three levels of inputs may be used to measure fair value:
· | Level 1—Observable inputs are unadjusted quoted prices in active markets for identical assets or liabilities.
· | Level 2—Observable inputs are quoted prices for similar assets and liabilities in active markets or inputs other than quoted prices which are observable for the assets or liabilities, either directly or indirectly through market corroboration, for substantially the full term of the financial instruments.
· | Level 3—Unobservable inputs which are supported by little or no market activity and which are significant to the fair value of the assets or liabilities. These inputs are based on our own assumptions used to measure assets and liabilities at fair value and require significant management judgment or estimation.
We measure our marketable securities and restricted cash at fair value on a recurring basis. We classify our marketable securities and restricted cash within Level 1 or Level 2 because they are valued using either quoted market prices for identical assets or inputs other than quoted prices which are directly or indirectly observable in the market, including readily-available pricing sources for the identical underlying security which may not be actively traded. The following tables set forth the fair value of our financial assets and liabilities measured at fair value on a recurring basis as of April 30, 2015 and January 31, 2015, using the above input categories (in thousands):
|  | April 30, 2015 |
|  | Level 1 |  |  | Level 2 |  |  | Level 3 |  |  | Fair Value |
Assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash and cash equivalents: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Corporate paper |  |  | — |  |  | $ | 21,695 |  |  |  | — |  |  | $ | 21,695 |
Marketable securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Corporate paper |  |  | — |  |  |  | 40,810 |  |  |  | — |  |  |  | 40,810 |
U.S. government agency obligations |  |  | — |  |  |  | 20,295 |  |  |  | — |  |  |  | 20,295 |
Corporate debt securities |  |  | — |  |  |  | 15,515 |  |  |  | — |  |  |  | 15,515 |
Asset-backed securities |  |  | — |  |  |  | 15,334 |  |  |  | — |  |  |  | 15,334 |
U.S. government obligations |  |  | — |  |  |  | 12,035 |  |  |  | — |  |  |  | 12,035 |
Restricted cash: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Certificates of deposit |  |  | — |  |  |  | 27,165 |  |  |  | — |  |  |  | 27,165 |
Money market funds |  |  | 1,202 |  |  |  | — |  |  |  | — |  |  |  | 1,202 |
Total assets measured at fair value |  | $ | 1,202 |  |  | $ | 152,849 |  |  | $ | — |  |  | $ | 154,051 |
|  | January 31, 2015 |
|  | Level 1 |  |  | Level 2 |  |  | Level 3 |  |  | Fair Value |
Assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restricted cash: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Certificates of deposit |  | $ | — |  |  | $ | 3,367 |  |  | $ | — |  |  | $ | 3,367 |
Total assets measured at fair value |  | $ | — |  |  | $ | 3,367 |  |  | $ | — |  |  | $ | 3,367 |

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- Definition The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 21 -URI http://asc.fasb.org/extlink&oid=49121117&loc=d3e13537-108611 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=49121117&loc=d3e13433-108611 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=6957238&loc=d3e14064-108612 Reference 4: 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 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 30 -URI http://asc.fasb.org/extlink&oid=6957238&loc=d3e14172-108612 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 16 -URI http://asc.fasb.org/extlink&oid=49121117&loc=d3e13504-108611 + Details
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