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Note 11 - Fair Value Measurements | 12 Months Ended
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Dec. 31, 2017
Notes to Financial Statements |
Fair Value Disclosures [Text Block] | 11. Fair Value Measurements The fair value of the Company’s financial instruments reflects the amounts that the Company estimates it will receive in connection with the sale of an asset or pay in connection with the transfer of a liability in an orderly transaction between market participants at the measurement date (exit price). The fair value hierarchy prioritizes the use of inputs used in valuation techniques into the following three levels: Level 1 - Quoted prices in active markets for identical assets and liabilities. Level 2 - Observable inputs other than quoted prices in active markets for identical assets and liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities. This category generally includes U.S. Government and agency securities; municipal securities; mutual funds and securities sold and not yet settled. Level 3 - Unobservable inputs. The substantial majority of the Company’s financial instruments are valued using quoted prices in active markets or based on other observable inputs. The following tables set forth the fair value of the financial instruments re-measured by the Company as of December 31, 2017 and 2016:
|  | Level 1 |  |  | Level 2 |  |  | Level 3 |  |  | Total |
December 31, 2017 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Corporate bonds and notes |  | $ | — |  |  | $ | 8,428 |  |  | $ | — |  |  | $ | 8,428 |
Municipal bonds |  |  | — |  |  |  | 4,610 |  |  |  | — |  |  |  | 4,610 |
Total |  | $ | — |  |  | $ | 13,038 |  |  | $ | — |  |  | $ | 13,038 |
December 31, 2016 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Corporate bonds and notes |  | $ | — |  |  | $ | 19,970 |  |  | $ | — |  |  | $ | 19,970 |
Municipal bonds |  |  | — |  |  |  | 6,425 |  |  |  | — |  |  |  | 6,425 |
Total |  | $ | — |  |  | $ | 26,395 |  |  | $ | — |  |  | $ | 26,395 |

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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 820 -URI http://asc.fasb.org/topic&trid=2155941 + Details
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