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FAIR VALUE MEASUREMENTS | 9 Months Ended
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Sep. 30, 2019
Fair Value Disclosures [Abstract] |
FAIR VALUE MEASUREMENTS | FAIR VALUE MEASUREMENTS As of September 30, 2019, cash and cash equivalents include the Company’s investments in municipal and corporate debt securities, money market funds, and time deposits. The Company considers all highly liquid investments with original maturities of three months or less when purchased and have insignificant interest rate risk to be cash equivalents. Debt securities classified as cash equivalents are required to be accounted for in accordance with the FASB Accounting Standards Codification (“ASC”) 320, Investments - Debt and Equity Securities. As such, the Company determined its investments in debt securities held at September 30, 2019 should be classified as available-for-sale and are carried at fair value with unrealized gains and losses reported in accumulated other comprehensive income in stockholders’ equity. The cost of debt securities is adjusted for amortization of premiums and discounts to maturity. This amortization is included in other income. Realized gains and losses, as well as interest income, are also included in other income. The fair values of securities are based on quoted market prices to the extent available or alternative pricing sources and models utilizing market observable inputs. The carrying amounts of the Company’s financial instruments, including cash and accounts payable, approximate fair value because of their short maturities. The carrying amount of the noncurrent restricted cash approximates fair value since, absent the restrictions, the underlying assets would be included in cash and cash equivalents. Accounting standards permit companies, at their option, to choose to measure many financial instruments and certain other items at fair value. The Company has elected to not fair value existing eligible items. Investments by significant category included in cash equivalents at the end of each period were as follows (in thousands):
|  | September 30, 2019 |  | December 31, 2018
| Fair Value Level 1 | Adjusted Cost |  | Gross Unrealized Losses |  | Fair Value |  | Adjusted Cost |  | Gross Unrealized Losses |  | Fair Value
Money market funds | Level 1 | $ | 30,810 |  |  | $ | — |  |  | $ | 30,810 |  |  | $ | 3,281 |  |  | $ | — |  |  | $ | 3,281 |
Time deposits | Level 2 | 14,904 |  |  | — |  |  | 14,904 |  |  | 18,071 |  |  | — |  |  | 18,071 |
Municipal debt securities | Level 2 | 3,432 |  |  | 1 |  |  | 3,433 |  |  | 12,149 |  |  | (7 | ) |  | 12,142 |
Corporate debt securities | Level 2 | 34,266 |  |  | (11 | ) |  | 34,255 |  |  | 51,862 |  |  | (26 | ) |  | 51,836 |
Total investments |  | $ | 83,412 |  |  | $ | (10 | ) |  | $ | 83,402 |  |  | $ | 85,363 |  |  | $ | (33 | ) |  | $ | 85,330 |
1 FASB Topic 820, Fair Value Measurements, establishes a fair value hierarchy that requires the use of observable market data, when available, and prioritizes the inputs to valuation techniques used to measure fair value in the following categories: Level 1: Quoted market prices in active markets for identical assets or liabilities. Level 2: Observable market-based inputs or unobservable inputs that are corroborated by market data. Level 3: Unobservable inputs that are not corroborated by market data.

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- References No definition available. + Details
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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/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
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