XML 37 R11.htm IDEA: XBRL DOCUMENT
v3.19.1

Investments | 12 Months Ended
--- | ---
Jan. 27, 2019
Investments [Abstract] |
Investments | Investments The following table summarizes the Company’s available-for-sale securities:
| January 27, 2019 |  | January 28, 2018
(in thousands) | Market Value |  | Adjusted Cost |  | Gross Unrealized Gain |  | Market Value |  | Adjusted Cost |  | Gross Unrealized Gain
Convertible debt | $ | 3,105 |  |  | $ | 3,105 |  |  | $ | — |  |  | $ | 1,960 |  |  | $ | 1,960 |  |  | $ | — |
Total other assets | $ | 3,105 |  |  | $ | 3,105 |  |  | $ | — |  |  | $ | 1,960 |  |  | $ | 1,960 |  |  | $ | — |
The following table summarizes the maturities of the Company’s available-for-sale securities:
| January 27, 2019
(in thousands) | Market Value |  | Adjusted Cost
Within 1 year | $ | 3,105 |  |  | $ | 3,105 |
After 1 year through 5 years | — |  |  | — |
Total investments | $ | 3,105 |  |  | $ | 3,105 |
The Company's AFS securities consisted of investments in convertible debt instruments issued by privately-held companies and are included in "Other current assets" in the Balance Sheets. The Company currently has an investment in Multiphy Ltd. ("Multiphy") that is accounted for at cost and was included in "Other assets" in the Balance Sheets. During the third quarter of fiscal year 2019, the Company reduced its expectation of Multiphy's future operating performance due to new information that became available during the quarter. The Company concluded that the competitive landscape had evolved and that product release and broad market adoption of 400G PAM4 digital signal processing (DSP) technology was delayed. As a result of these indicators of impairment, the Company tested the investment for an other-than-temporary impairment using a discounted cash flow model. The results of its analysis indicated that the investment was other-than temporarily impaired by $30.0 million, representing the entire carrying value of the investment. Multiphy began winding down operations during the fourth quarter of fiscal year 2019.

X
- Definition The entire disclosure for investments, including all tables. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 6 -Section 10 -Paragraph (c) -Subparagraph (1) + Details
Name: | invest_InvestmentTextBlock
Namespace Prefix: | invest_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_InvestmentsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration