Quarterly Financial Information (Details) - USD ($) $ / shares in Units, $ in Thousands |
3 Months Ended | 12 Months Ended | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
Apr. 30, 2017 |
Jan. 31, 2017 |
Oct. 31, 2016 |
Jul. 31, 2016 |
Apr. 30, 2016 |
Jan. 31, 2016 |
Oct. 31, 2015 |
Jul. 31, 2015 |
Apr. 30, 2017 |
Apr. 30, 2016 |
Apr. 30, 2015 |
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| Quarterly Financial Information Disclosure [Abstract] | |||||||||||
| Revenue | $ 50,209 | $ 50,525 | $ 50,408 | $ 50,093 | $ 50,709 | $ 50,255 | $ 49,926 | $ 48,876 | $ 201,235 | $ 199,766 | $ 191,181 |
| Cost of revenue | 19,596 | 19,196 | 18,855 | 18,756 | 19,253 | 18,920 | 19,146 | 19,548 | 76,403 | 76,867 | 69,906 |
| Gross profit | 30,613 | 31,329 | 31,553 | 31,337 | 31,456 | 31,335 | 30,780 | 29,328 | 124,832 | 122,899 | 121,275 |
| Sales and marketing | 17,803 | 16,322 | 15,819 | 15,304 | 18,027 | 16,113 | 16,502 | 19,166 | 65,248 | 69,808 | 78,373 |
| Research and development | 9,467 | 9,588 | 9,959 | 11,073 | 10,391 | 10,199 | 10,354 | 10,533 | 40,087 | 41,477 | 37,695 |
| General and administrative | 8,343 | 7,299 | 8,051 | 8,259 | 7,577 | 6,940 | 7,643 | 8,238 | 31,952 | 30,398 | 30,507 |
| Restructuring charges | 1,108 | 0 | 767 | 327 | 1,575 | 0 | 0 | 0 | 2,202 | 1,575 | 0 |
| Sales tax refund | (3,341) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | (3,341) | 0 | 0 |
| Acquisition-related and other | 196 | 84 | 120 | 176 | 157 | 332 | 224 | 702 | 576 | 1,415 | 4,046 |
| Amortization of acquired intangible assets | 309 | 309 | 310 | 309 | 309 | 309 | 310 | 309 | 1,237 | 1,237 | 1,237 |
| Total operating expenses | 33,885 | 33,602 | 35,026 | 35,448 | 38,036 | 33,893 | 35,033 | 38,948 | 137,961 | 145,910 | 151,858 |
| Operating loss | (3,272) | (2,273) | (3,473) | (4,111) | (6,580) | (2,558) | (4,253) | (9,620) | (13,129) | (23,011) | (30,583) |
| Total other expense, net | (499) | (332) | (569) | (859) | (384) | (719) | (475) | (712) | (2,259) | (2,290) | (2,527) |
| Net loss before income taxes | (3,771) | (2,605) | (4,042) | (4,970) | (6,964) | (3,277) | (4,728) | (10,332) | (15,388) | (25,301) | (33,110) |
| Income tax expense (benefit) | 203 | 123 | 92 | 135 | 165 | (163) | 124 | (88) | 553 | 38 | 54 |
| Net loss | $ (3,974) | $ (2,728) | $ (4,134) | $ (5,105) | $ (7,129) | $ (3,114) | $ (4,852) | $ (10,244) | $ (15,941) | $ (25,339) | $ (33,164) |
| Basic and diluted earnings per share | $ (0.05) | $ (0.03) | $ (0.05) | $ (0.06) | $ (0.09) | $ (0.04) | $ (0.06) | $ (0.13) | $ (0.19) | $ (0.31) | $ (0.42) |
| X | ||||||||||
- Definition The amount of cah recieved during the period as refunds for the overpayment of sales taxes. No definition available.
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- Definition The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The aggregate costs related to goods produced and sold and services rendered by an entity during the reporting period. This excludes costs incurred during the reporting period related to financial services rendered and other revenue generating activities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The aggregate total of expenses of managing and administering the affairs of an entity, including affiliates of the reporting entity, which are not directly or indirectly associated with the manufacture, sale or creation of a product or product line. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Aggregate revenue less cost of goods and services sold or operating expenses directly attributable to the revenue generation activity. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount after tax of income (loss) from continuing operations attributable to the parent. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The amount of net income (loss) from continuing operations per each basic and diluted share of common stock or unit when the per share amount is the same for both basic and diluted shares. No definition available.
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- Definition Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The aggregate amount of income or expense from ancillary business-related activities (that is to say, excluding major activities considered part of the normal operations of the business). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Generally recurring costs associated with normal operations except for the portion of these expenses which can be clearly related to production and included in cost of sales or services. Includes selling, general and administrative expense. No definition available.
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- Definition The net result for the period of deducting operating expenses from operating revenues. No definition available.
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- References No definition available.
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- Definition The aggregate costs incurred (1) in a planned search or critical investigation aimed at discovery of new knowledge with the hope that such knowledge will be useful in developing a new product or service, a new process or technique, or in bringing about a significant improvement to an existing product or process; or (2) to translate research findings or other knowledge into a plan or design for a new product or process or for a significant improvement to an existing product or process whether intended for sale or the entity's use, during the reporting period charged to research and development projects, including the costs of developing computer software up to the point in time of achieving technological feasibility, and costs allocated in accounting for a business combination to in-process projects deemed to have no alternative future use. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The aggregate total amount of expenses directly related to the marketing or selling of products or services. No definition available.
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