XML 33 R13.htm IDEA: XBRL DOCUMENT
v3.19.3

Investments | 6 Months Ended
--- | ---
Oct. 26, 2019
Investments |
Investments | 3. Investments ​ Investments consist of the following (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | October 26, | ​ | April 30, | ​
​ |  | 2019 |  | 2019 |
​ | ​ | ​ | ​
Short-term investments: | ​ | ​ | ​ | ​ | ​ | ​ | ​
Held-to-maturity securities: | ​ | ​ | ​ | ​ | ​ | ​ | ​
Municipal securities | ​ | $ | 21,761 | ​ | $ | 5,332 | ​
U.S. government securities | ​ | ​ | 65,826 | ​ | ​ | 63,205 | ​
Corporate bonds | ​ | ​ | 74,048 | ​ | ​ | 81,950 | ​
Total held-to-maturity short-term investments | ​ | $ | 161,635 | ​ | $ | 150,487 | ​
Long-term investments: | ​ | ​ | ​ | ​ | ​ | ​ | ​
Held-to-maturity securities: | ​ | ​ | ​ | ​ | ​ | ​ | ​
Municipal securities | ​ | ​ | 5,015 | ​ | ​ | — | ​
U.S. government securities | ​ | ​ | — | ​ | ​ | 7,404 | ​
Corporate bonds | ​ | ​ | 2,495 | ​ | ​ | 1,982 | ​
Certificates of deposit | ​ | ​ | 1,021 | ​ | ​ | — | ​
Total held-to-maturity investments | ​ |  | 8,531 | ​ |  | 9,386 | ​
Available-for-sale securities: | ​ | ​ | ​ | ​ | ​ | ​ | ​
Investment in limited partnership fund | ​ |  | 4,947 | ​ |  | — | ​
Total available-for-sale investments | ​ |  | 4,947 | ​ |  | — | ​
Total long-term investments | ​ | $ | 13,478 | ​ | $ | 9,386 | ​
​ Held-To-Maturity Securities ​ As of October 26, 2019 and April 30, 2019, the balance of held-to-maturity securities consisted of state and local government municipal securities, U.S. government securities, U.S. government agency securities, and highly rated corporate bonds. Interest earned from these investments is recorded in interest income. ​ The amortized cost, gross unrealized gains, gross unrealized losses, and estimated fair value of the held-to-maturity investments as of October 26, 2019 were as follows (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | October 26, 2019 | ​
​ |  | ​ | ​ |  | Gross |  | Gross |  | ​ | ​ |
​ | ​ | Amortized | ​ | Unrealized | ​ | Unrealized | ​ | Fair | ​
​ | ​ | Cost | ​ | Gains | ​ | Losses | ​ | Value | ​
Municipal securities | ​ | $ | 26,776 | ​ | $ | — | ​ | $ | (6) |  | $ | 26,770 | ​
U.S. government securities | ​ | ​ | 65,826 | ​ | ​ | 150 | ​ | ​ | — | ​ |  | 65,976 | ​
Corporate bonds | ​ | ​ | 76,543 | ​ | ​ | 52 | ​ | ​ | (11) | ​ |  | 76,584 | ​
Certificates of deposit | ​ | ​ | 1,021 | ​ | ​ | 1 | ​ | ​ | — | ​ | ​ | 1,022 | ​
Total held-to-maturity investments | ​ | $ | 170,166 | ​ | $ | 203 | ​ | $ | (17) | ​ | $ | 170,352 | ​
​ The amortized cost, gross unrealized gains, gross unrealized losses, and estimated fair value of the held-to-maturity investments as of April 30, 2019 were as follows (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | April 30, 2019 |
​ | ​ | ​ | ​ | ​ | Gross | ​ | Gross | ​ | ​ | ​ | ​
​ | ​ | Amortized | ​ | Unrealized | ​ | Unrealized | ​ | Fair |
​ | ​ | Cost |  | Gains |  | Losses |  | Value |
Municipal securities |  | $ | 5,332 | ​ | $ | 2 | ​ | $ | (1) | ​ | $ | 5,333 | ​
U.S. government securities | ​ |  | 70,609 | ​ | ​ | 78 | ​ | ​ | (52) | ​ | ​ | 70,635 | ​
Corporate bonds | ​ |  | 83,932 | ​ | ​ | 20 | ​ | ​ | (5) | ​ | ​ | 83,947 | ​
Total held-to-maturity investments |  | $ | 159,873 |  | $ | 100 |  | $ | (58) |  | $ | 159,915 | ​
​ The amortized cost and fair value of the held-to-maturity securities by contractual maturity at October 26, 2019 were as follows (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Cost |  | Fair Value |
Due within one year | ​ | $ | 161,635 | ​ | $ | 161,819 | ​
Due after one year through five years | ​ |  | 8,531 | ​ |  | 8,533 | ​
Total | ​ | $ | 170,166 | ​ | $ | 170,352 | ​
​ Available-For-Sale Securities ​ Investment in Limited Partnership Fund ​ During the three months ended July 27, 2019, the Company made its initial capital contribution to a limited partnership fund. This investment does not have readily determinable fair values. The Company has elected to measure equity investments that do not have readily determinable fair values at cost minus impairment, if any, plus or minus changes resulting from observable price changes in orderly transactions for the identical or a similar investment of the same issuer. ​ The following table is a summary of the activity related to the available-for-sale investments recorded in long-term investments (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | April 30, 2019 |  | Changes in |  | ​ |  | October 26, 2019 |
​ | ​ | Carrying | ​ | Fair Value | ​ | Sales or | ​ | Carrying |
​ | ​ | Value | ​ | Reflected in Net Income | ​ | Purchases | ​ | Value |
Investment in limited partnership | ​ | $ | — | ​ | $ | — | ​ | $ | 4,947 | ​ | $ | 4,947 |
Total investments without readily determinable fair values |  | $ | — |  | $ | — |  | $ | 4,947 | ​ | $ | 4,947 | ​
​ Auction Rate Securities ​ As of April 30, 2018, the balance of available-for-sale auction rate securities consisted of two investment grade auction rate municipal bonds with maturities ranging from 1 to 16 years. These investments have characteristics similar to short term investments. During the three months ended July 28, 2018, the remaining investment grade auction rate municipal bonds were redeemed at par value.

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

X
- Definition The entire disclosure for investments in certain debt and equity securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 320 -URI http://asc.fasb.org/subtopic&trid=2209399 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 320 -URI http://asc.fasb.org/subtopic&trid=2324412 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -URI http://asc.fasb.org/topic&trid=2196928 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 940 -SubTopic 320 -URI http://asc.fasb.org/subtopic&trid=2176304 + Details
Name: | us-gaap_InvestmentsInDebtAndMarketableEquitySecuritiesAndCertainTradingAssetsDisclosureTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration