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Investments | 6 Months Ended
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Oct. 30, 2021
Investments |
Investments | 3. Investments ​ Investments consist of the following (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | October 30, | ​ | April 30, | ​
​ |  | 2021 |  | 2021 |
Short-term investments: | ​ | ​ | ​ | ​ | ​ | ​ | ​
Available-for-sale securities: | ​ | ​ | ​ | ​ | ​ | ​ | ​
Municipal securities | ​ | ​ | 6,311 | ​ | ​ | 22,245 | ​
U.S. government securities | ​ | ​ | — | ​ | ​ | 4,009 | ​
Corporate bonds | ​ | ​ | — | ​ | ​ | 5,717 | ​
Total short-term investments | ​ | $ | 6,311 | ​ | $ | 31,971 | ​
Long-term investments: | ​ | ​ | ​ | ​ | ​ | ​ | ​
Available-for-sale securities: | ​ | ​ | ​ | ​ | ​ | ​ | ​
Municipal securities | ​ | ​ | — | ​ | ​ | 988 | ​
U.S. government securities | ​ | ​ | — | ​ | ​ | 4,000 | ​
Total long-term available-for-sale investments | ​ |  | — | ​ |  | 4,988 | ​
Equity method investments | ​ | ​ | ​ | ​ | ​ | ​ | ​
Investment in limited partnership fund | ​ |  | 11,271 | ​ |  | 7,168 | ​
Total equity method investments | ​ |  | 11,271 | ​ |  | 7,168 | ​
Total long-term investments | ​ | $ | 11,271 | ​ | $ | 12,156 | ​
​ Available-For-Sale Securities ​ As of October 30, 2021 and April 30, 2021, the balance of available-for-sale securities consisted of state and local government municipal securities, U.S. government securities, U.S. government agency securities, and investment grade corporate bonds. Interest earned from these investments is recorded in interest income. Realized gains on sales of these investments on the basis of specific identification are recorded in interest (expense) income. ​ The following table is a summary of the activity related to the available-for-sale investments recorded in short-term and long-term investments as of October 30, 2021 and April 30, 2021, respectively (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | October 30, 2021 | ​ | ​
​ |  | ​ | ​ |  | Gross |  | Gross |  | ​ | ​ |  |
​ | ​ | Amortized | ​ | Unrealized | ​ | Unrealized | ​ | Fair | ​ | ​
​ | ​ | Cost | ​ | Gains | ​ | Losses | ​ | Value | ​ | ​
Municipal securities | ​ | $ | 6,309 | ​ | $ | 2 | ​ | $ | — | ​ | $ | 6,311 | ​ | ​
Total available-for-sale investments | ​ | $ | 6,309 | ​ | $ | 2 | ​ | $ | — | ​ | $ | 6,311 | ​ | ​
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | April 30, 2021 | ​
​ | ​ | ​ | ​ | ​ | Gross | ​ | Gross | ​ | ​ | ​ | ​
​ | ​ | Amortized | ​ | Unrealized | ​ | Unrealized | ​ | Fair |
​ | ​ | Cost |  | Gains | ​ | Losses |  | Value |
Municipal securities |  | $ | 23,227 | ​ | $ | 8 | ​ | $ | (2) | ​ | $ | 23,233 | ​
U.S. government securities | ​ |  | 8,008 | ​ | ​ | 1 | ​ | ​ | — | ​ | ​ | 8,009 | ​
Corporate bonds | ​ |  | 5,718 | ​ | ​ | — | ​ | ​ | (1) | ​ | ​ | 5,717 | ​
Total available-for-sale investments |  | $ | 36,953 |  | $ | 9 | ​ | $ | (3) |  | $ | 36,959 | ​
​ The amortized cost and fair value of the available-for-sale debt securities by contractual maturity at October 30, 2021 were as follows (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Cost |  | Fair Value |
Due within one year | ​ | $ | 6,309 | ​ | $ | 6,311 | ​
Due after one year through five years | ​ |  | — | ​ |  | — | ​
Total | ​ | $ | 6,309 | ​ | $ | 6,311 | ​
​

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- 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 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher SEC -Name Regulation S-K (SK) -Number 229 -Section 1403 -Paragraph (b) + Details
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