Stockholders' Equity (Tables)
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12 Months Ended |
Apr. 30, 2016 |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Summary of Stock-Based Compensation Amounts Found on Company's Consolidated Statement of Operations |
The following table presents the amount of stock-based compensation related to stock-based awards to employees on the Company’s consolidated statements of operations during the periods presented (in thousands): | | | | | | | | | | | | | | Year Ended April 30, | | 2016 | | 2015 | | 2014 | Cost of revenue | $ | 2,167 |
| | $ | 1,517 |
| | $ | 1,155 |
| Sales and marketing | 2,956 |
| | 3,923 |
| | 4,496 |
| Research and development | 2,671 |
| | 1,960 |
| | 2,176 |
| General and administrative | 6,967 |
| | 4,677 |
| | 5,357 |
| Loss from discontinued operations, net of tax | — |
| | 124 |
| | 643 |
| Stock-based expense | 14,761 |
| | 12,201 |
| | 13,827 |
| Capitalized stock-based compensation | 813 |
| | 601 |
| | 641 |
| Total stock-based compensation | 15,574 |
| | 12,802 |
| | 14,468 |
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| Stock Option Activity |
Stock option activity was as follows: | | | | | | | | | | | | | | | Number of Options (in thousands) | | Weighted Average Exercise Price | | Weighted Average Remaining Contractual Term (in years) | | Aggregate Intrinsic Value (in thousands) | Balance as of April 30, 2014 | 7,091 |
| | 7.74 |
| | | | | Options granted | 939 |
| | 7.31 |
| | | | | Options exercised | (1,246 | ) | | 4.18 |
| | | | | Options forfeited | (877 | ) | | 8.98 |
| | | | | Options expired | (814 | ) | | 10.78 |
| | | | | Balance as of April 30, 2015 | 5,093 |
| | $ | 7.83 |
| | 7.00 | | $ | 1,590 |
| Options granted | 2,947 |
| | 4.83 |
| | | | | Options exercised | (227 | ) | | 3.95 |
| | | | | Options forfeited | (484 | ) | | 7.42 |
| | | | | Options expired | (641 | ) | | 8.14 |
| | | | | Balance as of April 30, 2016 | 6,688 |
| | $ | 6.64 |
| | 6.43 | | $ | 591 |
| Options vested and expected to vest at April 30, 2016 | 6,666 |
| | $ | 6.64 |
| | 6.43 | | $ | 591 |
| Options vested and exercisable as of April 30, 2016 | 3,004 |
| | $ | 8.04 |
| | 4.58 | | $ | 373 |
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| Summary of Stock Options |
The summary of stock options as of April 30, 2016 is as follows (number of options in thousands): | | | | | | | | | | | | | | | | | | Options Outstanding | | Options Exercisable | Range of Exercise Prices | Number of Options | | Weighted Average Exercise Price | | Weighted Average Remaining Contractual Term (in years) | | Number of Options | | Weighted Average Exercise Price | $0.16 - $3.03 | 392,937 |
| | $ | 2.35 |
| | 3.23 | | 332,937 |
| | $ | 2.23 |
| $3.15 - $3.15 | 990,000 |
| | 3.15 |
| | 6.84 | | — |
| | — |
| $3.42 - $4.86 | 734,387 |
| | 4.36 |
| | 7.23 | | 254,387 |
| | 4.69 |
| $4.87 - $6.28 | 261,911 |
| | 5.49 |
| | 8.49 | | 112,327 |
| | 5.44 |
| $6.42 - $6.42 | 1,196,400 |
| | 6.42 |
| | 8.77 | | — |
| | — |
| $6.54 - $7.36 | 788,373 |
| | 6.96 |
| | 7.34 | | 523,263 |
| | 6.89 |
| $7.39 - $7.53 | 756,475 |
| | 7.47 |
| | 4.27 | | 489,204 |
| | 7.46 |
| $7.60 - $9.51 | 892,709 |
| | 9.18 |
| | 6.78 | | 635,401 |
| | 9.21 |
| $9.52 - 15.12 | 639,808 |
| | 12.60 |
| | 2.61 | | 621,392 |
| | 12.61 |
| $18.67 - $18.67 | 35,200 |
| | 18.67 |
| | 5.93 | | 35,200 |
| | 18.67 |
| $0.16 - $18.67 | 6,688,200 |
| | $ | 6.64 |
| | 6.43 | | 3,004,111 |
| | $ | 8.04 |
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| Restricted Stock Activity |
Restricted stock activity was as follows (number of restricted shares in thousands): | | | | | | | | | | | Number of Restricted Shares | | Weighted Average Grant Date Fair Value | Unvested balance as of April 30, 2014 | | 2,977 |
| | $ | 8.44 |
| Restricted shares granted | | 2,305 |
| | 7.66 |
| Restricted shares vested | | (715 | ) | | 8.74 |
| Restricted shares forfeited | | (1,079 | ) | | 8.38 |
| Unvested balance as of April 30, 2015 | | 3,488 |
| | $ | 7.88 |
| Restricted shares granted | | 3,863 |
| | 5.93 |
| Restricted shares vested | | (964 | ) | | 7.70 |
| Restricted shares forfeited | | (1,420 | ) | | 7.16 |
| Unvested balance as of April 30, 2016 | | 4,967 |
| | $ | 6.60 |
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| Stock Options |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Assumptions Used to Estimate Fair Value of Option Pricing Model |
The fair value of the Company’s options was estimated at the date of grant using a Black-Scholes option pricing model with the following assumptions: | | | | | | | | Year Ended April 30, | | 2016 | | 2015 | | 2014 | Expected volatility | 42% - 42% | | 43% - 50% | | 53% - 54% | Risk-free interest rate | 1.50% - 1.92% | | 1.46% - 1.93% | | 1.30% - 2.09% | Expected term (in years) | 6.00 | | 6.00 | | 6.00 - 6.25 | Dividend yield | — | | — | | — |
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| Employee Stock Purchase Plan [Member] |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Assumptions Used to Estimate Fair Value of Option Pricing Model |
The fair value of the Company’s ESPP was estimated at the date of grant using a Black-Scholes option pricing model with the following assumptions: | | | | | | | | Year Ended April 30, | | 2016 | | 2015 | | 2014 | Expected volatility | 30% - 57% | | 36% - 57% | | 36% - 43% | Risk-free interest rate | 0.10% - 0.46% | | 0.05% - 0.11% | | 0.05% - 0.11% | Expected term (in years) | 0.5 | | 0.5 | | 0.5 | Dividend yield | — | | — | | — |
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