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Income Taxes (Tables) | 12 Months Ended
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Apr. 30, 2021
Income Taxes |
Schedule of components of income before income taxes | ​ The components of income before income taxes are as follows (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Year Ended April 30, |
​ | ​ | 2021 | ​ | 2020 | ​ | 2019 |
Domestic | ​ | $ | 34,274 | ​ | $ | 52,730 | ​ | $ | 50,644 | ​
Foreign | ​ | ​ | 91 | ​ |  | (60) | ​ |  | (166) | ​
Income from continuing operations before income taxes | ​ | ​ | 34,365 | ​ | ​ | 52,670 | ​ | ​ | 50,478 | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Equity method investment loss | ​ | ​ | (10,481) | ​ | ​ | (5,487) | ​ | ​ | (3,944) | ​
Total income from continuing operations before income taxes | ​ | $ | 23,884 | ​ | $ | 47,183 | ​ | $ | 46,534 | ​
​
Schedule of reconciliation of income tax expense computed using the U.S. federal statutory rates to actual income tax expense | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year Ended April 30, | ​
​ |  | 2021 | ​ |  | 2020 |  |  | 2019 | ​
U.S. federal statutory income tax rate |  | 21.0 | % | ​ | 21.0 | % | ​ | 21.0 | %
State and local income taxes, net of federal benefit |  | (1.4) | ​ | ​ | (2.1) | ​ | ​ | (2.2) | ​
R&D and other tax credits |  | (11.5) | ​ | ​ | (6.8) | ​ | ​ | (8.1) | ​
Valuation allowance |  | 3.2 | ​ | ​ | 3.4 | ​ | ​ | 3.7 | ​
Return to provision adjustments | ​ | (0.3) | ​ | ​ | 0.1 | ​ | ​ | (0.3) | ​
Permanent items | ​ | 3.6 | ​ | ​ | 0.7 | ​ | ​ | 0.8 | ​
Foreign derived intangible income | ​ | (7.6) | ​ | ​ | (3.9) | ​ | ​ | (3.7) | ​
Excess benefit of equity awards | ​ | (5.7) | ​ | ​ | (1.5) | ​ | ​ | (3.1) | ​
Other |  | 0.3 | ​ | ​ | 0.2 | ​ | ​ | 1.1 | ​
Effective income tax rate |  | 1.6 | % | ​ | 11.1 | % | ​ | 9.2 | %
​
Schedule of components of the provision for income taxes | The components of the provision for income taxes are as follows (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year Ended April 30, |
​ |  | 2021 |  | 2020 |  | 2019 |
Current: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Federal | ​ | $ | 3,094 | ​ | $ | 3,005 | ​ | $ | 1,953 | ​
State | ​ |  | 448 | ​ |  | 390 | ​ |  | 228 | ​
Foreign | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​
​ | ​ |  | 3,542 | ​ |  | 3,395 | ​ |  | 2,181 | ​
Deferred: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Federal | ​ |  | (3,247) | ​ |  | 2,063 | ​ |  | 1,945 | ​
State | ​ |  | 244 | ​ |  | 421 | ​ |  | 551 | ​
Foreign | ​ | ​ | — | ​ | ​ | (31) | ​ | ​ | (36) | ​
​ | ​ |  | (3,003) | ​ |  | 2,453 | ​ |  | 2,460 | ​
Total income tax expense | ​ | $ | 539 | ​ | $ | 5,848 | ​ | $ | 4,641 | ​
​
Schedule of components of the Company's deferred income tax assets and liabilities | Significant components of the Company’s deferred income tax assets and liabilities are as follows (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | April 30, |
​ |  | 2021 |  | 2020 |
Deferred income tax assets: | ​ | ​ | ​ | ​ | ​ | ​ | ​
Accrued expenses | ​ | $ | 4,422 | ​ | $ | 3,337 | ​
Stock based compensation | ​ | ​ | 2,492 | ​ | ​ | 2,259 | ​
Allowances, reserves, and other | ​ |  | 1,482 | ​ |  | 1,784 | ​
Outside basis difference | ​ | ​ | 4,617 | ​ | ​ | 2,264 | ​
Unrealized loss on securities | ​ |  | 110 | ​ |  | 9 | ​
Net operating loss and credit carry-forwards | ​ |  | 33,155 | ​ |  | 12,832 | ​
Intangibles basis | ​ |  | — | ​ |  | 605 | ​
Lease liability | ​ | ​ | 5,645 | ​ | ​ | 2,282 | ​
Total deferred income tax assets | ​ |  | 51,923 | ​ |  | 25,372 | ​
Deferred income tax liabilities: | ​ | ​ | ​ | ​ | ​ | ​ | ​
Fixed asset basis | ​ |  | (10,286) | ​ |  | (1,218) | ​
Revenue recognition | ​ | ​ | — | ​ | ​ | (3,112) | ​
Right-of-use asset | ​ | ​ | (5,119) | ​ | ​ | (1,965) | ​
Intangibles basis | ​ | ​ | (17,004) | ​ | ​ | — | ​
Total deferred income tax liabilities | ​ |  | (32,409) | ​ |  | (6,295) | ​
Valuation allowance | ​ |  | (17,453) | ​ |  | (14,149) | ​
Net deferred tax assets | ​ | $ | 2,061 | ​ | $ | 4,928 | ​
​
Summary of activity related to gross unrecognized tax benefits | The following table summarizes the activity related to the Company’s gross unrecognized tax benefits for the years ended April 30, 2021 and 2020 (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | April 30, |
​ |  | 2021 |  | 2020 |
Balance as of May 1 | ​ | $ | 14,347 | ​ | $ | 12,593 | ​
Increases related to prior year tax positions | ​ |  | 1,305 | ​ |  | 62 | ​
Decreases related to prior year tax positions | ​ |  | (116) | ​ |  | — | ​
Increases related to current year tax positions | ​ |  | 2,074 | ​ |  | 1,971 | ​
Decreases related to lapsing of statute of limitations | ​ |  | (54) | ​ |  | (279) | ​
Balance as of April 30 | ​ | $ | 17,556 | ​ | $ | 14,347 | ​
​

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