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Investments
 12 Months Ended
Oct. 02, 2020
Investments, Debt and Equity Securities [Abstract]  
Investments INVESTMENTS
All investments are short-term in nature and are invested in corporate bonds and commercial paper, and are classified as available-for-sale. The amortized cost, gross unrealized holding gains or losses and fair value of our available-for-sale investments by major investments type are summarized in the tables below (in thousands): 
 October 2, 2020
 Amortized CostGross Unrealized Holding GainsGross Unrealized Holding LossesAggregate Fair Value
Corporate bonds$68,605 $348 $(333)$68,620 
Commercial paper134,913 192 (14)135,091 
Total investments$203,518 $540 $(347)$203,711 
 September 27, 2019
 Amortized CostGross Unrealized Holding GainsGross Unrealized Holding LossesAggregate Fair Value
Corporate bonds$29,578 $112 $(93)$29,597 
Commercial paper71,646 1 (18)71,629 
Total investments$101,224 $113 $(111)$101,226 
The contractual maturities of available-for-sale investments were as follows (in thousands):
 October 2, 2020
Less than 1 year$138,612 
Over 1 year65,099 
Total investments$203,711 
We have determined that the gross unrealized losses on available for sale securities at October 2, 2020 and September 27, 2019 are temporary in nature. We review our investments to identify and evaluate investments that have indications of possible impairment. The techniques used to measure the fair value of our investments are described in Note 2 - Summary of Significant Accounting Policies. Factors considered in determining whether a loss is temporary include the length of time and extent to which fair value has been less than the cost basis, the financial condition and near-term prospects of the investee, and our intent and ability to hold the investment for a period of time sufficient to allow for any anticipated recovery in market value. Substantially all of our fixed income securities are rated investment grade.
We received proceeds from sales of available-for-sale securities of $183.9 million, $173.0 million and $100.4 million during the fiscal years 2020, 2019 and 2018, respectively. Gross realized gains and losses from such sales were immaterial during the fiscal years ended October 2, 2020, September 27, 2019 and September 28, 2018 and were recorded within other expense.
Other Investments— As of October 2, 2020 and September 27, 2019, we held two non-marketable equity investments classified as other long-term investments, which includes an investment in a Series B preferred stock ownership of a privately held manufacturing corporation with preferred liquidation rights over other equity shares. As the equity securities do not have a readily determinable fair value and do not qualify for the practical expedient under ASC 820, Fair Value Measurement, we have elected to account for this investment at cost less any impairment. During the fiscal quarter ended October 2, 2020, we identified impairment indicators for this investment and recorded an impairment charge of $2.5 million to Other expense. The carrying value of this investment was $2.5 million and $5.0 million as of October 2, 2020 and September 27, 2019, respectively.
Also included in long-term investments, is a minority investment of less than 20% of the outstanding equity of Compute. This investment was acquired in conjunction with the divestiture of the Compute business during our fiscal year 2018, had an initial value
of $36.5 million and is accounted for using the equity method. We have no obligation to provide further funding to Compute. This investment value is updated quarterly based on our proportionate share of the losses or earnings of Compute, as well as any changes in Compute's equity, utilizing the equity method. During fiscal years 2020, 2019 and 2018, we recorded $3.4 million, $7.5 million and $10.4 million of non-cash net losses associated with this investment as other expense in our Consolidated Statements of Operations. The net loss amounts for fiscal years 2020 and 2019 include non-cash gains of $16.6 million and $10.8 million, respectively, associated with changes in Compute’s equity. The carrying value of this investment was $15.2 million and $18.6 million as of October 2, 2020 and September 27, 2019, respectively.