Note 3 - Financial Instruments and Fair Value Measurements	3 Months Ended
Feb. 27, 2021
Notes to Financial Statements
Fair Value Disclosures [Text Block]	3. Financial Instruments and Fair Value Measurements Financial Instruments Our financial instruments include cash and cash equivalents, short-term investments in certificates of deposit (CDs), accounts receivable, and accounts payable. Because of their short maturities, the carrying amounts of cash and cash equivalents, short-term investments in CDs, accounts receivable, and accounts payable approximate fair value. Investments Our short-term investments of $17,715 at February 27, 2021 and November 28, 2020 consisted of CDs. At February 27, 2021, the CDs had original terms averaging eight months, bearing interest at rates ranging from 0.05% to 1.20%. At February 27, 2021, the weighted average remaining time to maturity of the CDs was approximately five months and the weighted average yield of the CDs was approximately 0.12%. Each CD is placed with a federally insured financial institution and all deposits are within federal deposit insurance limits. Due to the nature of these investments and their relatively short maturities, the carrying amount of the short-term investments at February 27, 2021 and November 28, 2020 approximates their fair value. Fair Value Measurement The Company accounts for items measured at fair value in accordance with ASC Topic 820, Fair Value Measurements and Disclosures. ASC 820’s valuation techniques are based on observable and unobservable inputs. Observable inputs reflect readily obtainable data from independent sources, while unobservable inputs reflect our market assumptions. ASC 820 classifies these inputs into the following hierarchy: Level 1 Inputs– Quoted prices for identical instruments in active markets. Level 2 Inputs– Quoted prices for similar instruments in active markets; quoted prices for identical or similar instruments in markets that are not active; and model-derived valuations whose inputs are observable or whose significant value drivers are observable. Level 3 Inputs– Instruments with primarily unobservable value drivers. We believe that the carrying amounts of our current assets and current liabilities approximate fair value due to the short-term nature of these items. Our primary non-recurring fair value estimates typically involve business acquisitions or the impairment of long-lived assets which involve a combination of Level 2 and Level 3 inputs.

- 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.

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