Barracuda Networks (CUDA) 10-Q 10 Oct 17 2018 Q2 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	6 Months Ended
	Aug. 31, 2017	Sep. 29, 2017
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Aug. 31, 2017
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	Q2
Trading Symbol	CUDA
Entity Registrant Name	BARRACUDA NETWORKS INC
Entity Central Index Key	1,348,334
Current Fiscal Year End Date	--02-28
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		53,281,244

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Aug. 31, 2017	Feb. 28, 2017
Current assets:
Cash and cash equivalents	$ 125,585	$ 120,194
Marketable securities	80,991	79,915
Accounts receivable, net of allowance for doubtful accounts of $3,217 and $2,857 as of August 31, 2017 and February 28, 2017, respectively	40,899	40,560
Inventories, net	6,520	5,847
Prepaid income taxes	3,107	11,050
Deferred costs	34,206	32,598
Other current assets	7,366	5,245
Total current assets	298,674	295,409
Property and equipment, net	32,043	29,979
Deferred costs, non-current	30,246	27,285
Deferred income taxes, non-current	1,023	1,554
Other non-current assets	15,320	8,607
Intangible assets, net	28,692	32,145
Goodwill	70,653	69,795
Total assets	476,651	464,774
Current liabilities:
Accounts payable	7,710	11,439
Accrued payroll and related benefits	12,825	13,593
Other accrued liabilities	10,773	12,942
Deferred revenue	245,517	239,796
Note payable	0	4,115
Total current liabilities	276,825	281,885
Long-term liabilities:
Deferred revenue, non-current	168,148	167,286
Deferred income taxes, non-current	3,073	2,803
Other long-term liabilities	6,776	6,377
Commitments and contingencies (Note 8)
Stockholders’ equity:
Preferred stock, $0.001 par value; 20,000,000 shares authorized; zero shares issued and outstanding as of August 31, 2017 and February 28, 2017, respectively	0	0
Common stock, $0.001 par value; 1,000,000,000 shares authorized; 53,153,432 and 52,897,128 shares issued and outstanding as of August 31, 2017 and February 28, 2017, respectively	53	53
Additional paid-in capital	384,395	370,745
Accumulated other comprehensive loss	(3,076)	(5,226)
Accumulated deficit	(359,543)	(359,149)
Total stockholders’ equity	21,829	6,423
Total liabilities and stockholders’ equity	$ 476,651	$ 464,774

Condensed Consolidated Balance3

Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Aug. 31, 2017	Feb. 28, 2017
Statement of Financial Position [Abstract]
Account receivable, allowance for doubtful accounts	$ 3,217	$ 2,857
Preferred stock, par value (in usd per share)	$ 0.001	$ 0.001
Preferred stock, shares authorized	20,000,000	20,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value (in usd per share)	$ 0.001	$ 0.001
Common stock, shares authorized	1,000,000,000	1,000,000,000
Common stock, shares issued	53,153,432	52,897,128
Common stock, shares outstanding	53,153,432	52,897,128

Condensed Consolidated Statemen

Condensed Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Aug. 31, 2017	Aug. 31, 2016	Aug. 31, 2017	Aug. 31, 2016
Revenue:
Appliance	$ 18,347	$ 21,034	$ 38,612	$ 42,367
Subscription	75,978	66,896	149,892	132,217
Total revenue	94,325	87,930	188,504	174,584
Cost of revenue	25,198	20,240	48,846	40,481
Gross profit	69,127	67,690	139,658	134,103
Operating expenses:
Research and development	19,440	18,446	38,796	37,653
Sales and marketing	38,561	32,144	74,781	63,474
General and administrative	10,338	10,969	21,282	21,741
Total operating expenses	68,339	61,559	134,859	122,868
Income from operations	788	6,131	4,799	11,235
Other income, net	1,124	1,515	2,308	2,505
Income before income taxes	1,912	7,646	7,107	13,740
Provision for income taxes	(358)	(5,209)	(2,881)	(8,519)
Net income (Note 9)	$ 1,554	$ 2,437	$ 4,226	$ 5,221
Net income per share:
Basic (in usd per share)	$ 0.03	$ 0.05	$ 0.08	$ 0.10
Diluted (in usd per share)	$ 0.03	$ 0.05	$ 0.08	$ 0.10
Weighted-average shares used to compute net income per share:
Basic (in shares)	53,040	52,265	52,958	52,275
Diluted (in shares)	54,609	53,321	54,470	53,088

Condensed Consolidated Stateme5

Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Aug. 31, 2017	Aug. 31, 2016	Aug. 31, 2017	Aug. 31, 2016
Statement of Comprehensive Income [Abstract]
Net income	$ 1,554	$ 2,437	$ 4,226	$ 5,221
Other comprehensive income, net of tax:
Change in net foreign currency translation adjustment	1,090	(708)	1,991	(374)
Available-for-sale investments:
Change in net unrealized gains (losses) (net of tax effect of $0 in all periods)	68	(240)	149	370
Less: reclassification adjustment for net gains (losses) included in net income (net of tax effect of $(4), $247, $(6) and $394)	5	(459)	10	(732)
Net change	73	(699)	159	(362)
Other comprehensive income (loss)	1,163	(1,407)	2,150	(736)
Comprehensive income	$ 2,717	$ 1,030	$ 6,376	$ 4,485

Condensed Consolidated Stateme6

Condensed Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Aug. 31, 2017	Aug. 31, 2016	Aug. 31, 2017	Aug. 31, 2016
Statement of Comprehensive Income [Abstract]
Change in net unrealized gains (losses), tax effect	$ 0	$ 0	$ 0	$ 0
Reclassification adjustment for net gains (losses) included in net income, tax effect	$ 4	$ (247)	$ 6	$ (394)

Condensed Consolidated Stateme7

Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Aug. 31, 2017	Aug. 31, 2016
Operating activities
Net income	$ 4,226	$ 5,221
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and impairment expense	8,545	8,467
Stock-based compensation expense	17,011	15,833
Excess tax benefits from equity compensation plans	0	(791)
Deferred income taxes	804	474
Other	(261)	(728)
Changes in operating assets and liabilities:
Accounts receivable, net	(318)	2,732
Inventories, net	(744)	(83)
Income taxes, net	8,122	3,598
Deferred costs	(4,738)	340
Other assets	(5,027)	(597)
Accounts payable	(3,043)	(6,679)
Accrued payroll and related benefits	(641)	1,126
Other liabilities	(481)	(762)
Deferred revenue	7,755	4,456
Net cash provided by operating activities	31,210	32,607
Investing activities
Purchases of marketable securities	(21,769)	(21,777)
Proceeds from the sale of marketable securities	12,250	10,294
Proceeds from the maturity of marketable securities	8,342	8,018
Purchases of non-marketable investments	(4,000)	(636)
Purchases of property and equipment	(7,816)	(2,969)
Purchases of intangible assets	0	(1,000)
Business combinations, net of cash acquired	(506)	(243)
Payments for the sale of net liabilities	(800)	0
Net cash used in investing activities	(14,299)	(8,313)
Financing activities
Proceeds from issuance of common stock	3,009	4,869
Taxes paid related to net share settlement of equity awards	(4,474)	(2,544)
Excess tax benefits from equity compensation plans	0	791
Employee loans extended, net of repayment	31	(2)
Repayment of note payable	(4,115)	(133)
Repurchases of common stock	(6,546)	(7,241)
Payments of acquisition-related liabilities	(743)	0
Net cash used in financing activities	(12,838)	(4,260)
Effect of exchange rate changes	1,335	463
Net increase in cash, cash equivalents and restricted cash	5,408	20,497
Cash, cash equivalents and restricted cash at beginning of period	120,837	119,333
Cash, cash equivalents and restricted cash at end of period	$ 126,245	$ 139,830

Overview and Basis of Presentat

Overview and Basis of Presentation	6 Months Ended
	Aug. 31, 2017
Accounting Policies [Abstract]
Overview and Basis of Presentation	Overview and Basis of Presentation Nature of Operations Barracuda Networks, Inc., also referred to in this report as "we," "our," "us," "Barracuda" or "the Company," is headquartered in Campbell, California, and designs and delivers powerful yet easy-to-use security and data protection solutions. We offer cloud-enabled solutions that help our customers address security threats, improve network performance and protect and store their data. Our solutions are designed to simplify IT operations for our customers, allowing them to enhance their return on technology investments. Use of Estimates The preparation of financial statements in conformity with generally accepted accounting principles in the United States ("GAAP") requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the reporting period. We evaluate our estimates on an ongoing basis, including those related to the fair values of stock-based awards, taxes and contingent liabilities, among others. We base our estimates on historical experience and on various other assumptions that we believe to be reasonable, the results of which form the basis for making judgments about the carrying values of assets and liabilities. Actual results could differ from those estimates and such differences could be material to our condensed consolidated financial position and results of operations. Basis of Presentation The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with GAAP, and follow the requirements of the U.S. Securities and Exchange Commission (the "SEC") for interim reporting. As permitted under those rules, certain footnotes or other financial information that are normally required by GAAP are condensed or omitted. In management’s opinion, the unaudited condensed financial statements have been prepared on the same basis as the audited financial statements and include all adjustments, which include only normal recurring adjustments, necessary for the fair presentation of our financial information. The results for the three and six months ended August 31, 2017 are not necessarily indicative of the results expected for the full fiscal year. The condensed consolidated balance sheet as of February 28, 2017 has been derived from audited financial statements at that date but does not include all of the information required by GAAP. The accompanying unaudited condensed consolidated financial statements include the accounts of Barracuda Networks, Inc. and our wholly owned subsidiaries. All significant intercompany accounts and transactions have been eliminated. The accompanying unaudited condensed consolidated financial statements and related financial information should be read in conjunction with the audited financial statements and related footnotes included in our most recent Annual Report on Form 10-K. There have been no material changes in our significant accounting policies from those that were disclosed in our Annual Report on Form 10-K for the fiscal year ended February 28, 2017 . Foreign Currency For those subsidiaries whose functional currency is not the U.S. dollar, assets and liabilities are translated into U.S. dollar equivalents at the exchange rate in effect on the balance sheet date and revenues and expenses are translated into U.S. dollars using the average exchange rate over the period. Resulting currency translation adjustments are recorded in accumulated other comprehensive loss in our condensed consolidated balance sheets. We recorded net gains resulting from foreign exchange transactions of $0.9 million and 1.9 million for the three and six months ended August 31, 2017 , respectively, and $0.9 million and $1.4 million for the three and six months ended August 31, 2016 , respectively, which were reflected as a component of other income, net in our condensed consolidated statements of income. We have foreign subsidiaries that operate and sell our products in various markets around the world. As a result, we are exposed to foreign exchange risks. We utilize foreign exchange forward contracts to manage foreign currency risk associated with foreign currency denominated monetary assets and liabilities, primarily trade receivables, and to reduce the volatility of earnings and cash flows related to foreign currency transactions. The fair values of our contracts as of August 31, 2017 and February 28, 2017 were not significant. The change in the fair value of these foreign currency forward contracts is recorded as gains (losses) in other income, net in our condensed consolidated statements of income. Recently Adopted Accounting Pronouncements On March 1, 2017, we adopted Accounting Standards Update No. 2016-09 ("ASU 2016-09"), which simplifies several aspects of employee share-based payment accounting. The impact of the adoption on our condensed consolidated financial statements was as follows: • Forfeitures: Under the new standard, we can make an accounting policy election to either estimate the number of share-based awards that are expected to vest or account for forfeitures when they occur. We elected to account for forfeitures when they occur and adopted this change on a modified retrospective basis. As a result, we recorded the cumulative effect of the change as a $0.4 million increase to the March 1, 2017 opening accumulated deficit balance on our condensed consolidated balance sheets. • Income tax accounting: The standard eliminates additional paid-in-capital ("APIC") pools and requires excess tax benefits and tax deficiencies on share-based awards to be recognized in the statement of income prospectively when share-based awards vest or are settled. The standard also requires excess tax benefits to be recognized regardless of whether the benefit reduces taxes payable. We adopted the guidance related to the timing of previously unrecognized excess tax benefits, which resulted in no impact to the March 1, 2017 opening accumulated deficit balance on our condensed consolidated balance sheets. • Net income per share: Because excess tax benefits are no longer recognized in APIC, the assumed proceeds from applying the treasury stock method when calculating dilutive shares was amended to exclude the amount of excess tax benefits that would be recognized upon exercise or vesting of such awards. As a result, this reduces the assumed shares to be repurchased under the treasury stock method, thereby increasing the amount of dilutive shares used to compute earnings per share. We adopted the guidance related to the exclusion of excess tax benefits in calculating net income per share on a prospective basis, with an insignificant impact. • Cash flow presentation of excess tax benefits: Prior to the new standard, we were required to present excess tax benefits on share-based awards as a cash inflow from financing activities with a corresponding cash outflow from operating activities. The new standard required that these excess tax benefits be classified as an operating activity. We adopted the guidance related to the presentation of excess tax benefits in our condensed consolidated statements of cash flows on a prospective basis with an insignificant impact, while the prior period presented has not been adjusted. In January 2017, the Financial Accounting Standards Board (the "FASB") issued Accounting Standards Update No. 2017-04 ("ASU 2017-04"), which eliminates Step 2 from the goodwill impairment test. Under ASU 2017-04, an entity should perform its annual, or interim, goodwill impairment test by comparing the fair value of a reporting unit with its carrying amount. An entity should recognize an impairment charge for the amount by which the carrying amount exceeds the reporting unit’s fair value; however, the loss recognized should not exceed the total amount of goodwill allocated to that reporting unit. Additionally, an entity should consider income tax effects from any tax deductible goodwill on the carrying amount of the reporting unit when measuring the goodwill impairment loss, if applicable. ASU 2017-04 is effective for annual or any interim goodwill impairment tests in fiscal years beginning after December 15, 2019. We early adopted ASU 2017-04 for impairment tests to be performed on testing dates after January 1, 2017, which did not impact our condensed consolidated financial statements. In November 2016, the FASB issued Accounting Standards Update No. 2016-18 ("ASU 2016-18"), which requires the statement of cash flows to explain the change during the period in the total of cash, cash equivalents, and amounts generally described as restricted cash or restricted cash equivalents. ASU 2016-18 is effective for fiscal years beginning after December 15, 2017. We early adopted ASU 2016-18 retrospectively, effective March 1, 2017. Net cash flows for the six months ended August 31, 2016 did not significantly change as a result of including restricted cash with cash and cash equivalents when reconciling the beginning-of-period and end-of-period total amounts shown on our condensed consolidated statements of cash flows. Recent Accounting Pronouncements In May 2017, the FASB issued Accounting Standards Update No. 2017-09 ("ASU 2017-09"), which provides guidance about which changes to the terms or conditions of a share-based payment award require an entity to apply modification accounting in Topic 718. ASU 2017-09 is effective for fiscal years beginning after December 15, 2017 and interim periods within those fiscal years, and early adoption is permitted, including in an interim period. ASU 2017-09 is to be applied on a prospective basis to an award modified on or after the adoption date. We do not intend to early adopt ASU 2017-09 and do not expect the adoption of ASU 2017-09 to have a material impact on our condensed consolidated financial statements. In March 2017, the FASB issued Accounting Standards Update No. 2017-08 ("ASU 2017-08"), which shortens the amortization period for certain callable debt securities held at a premium and requires the premium to be amortized to the earliest call date. ASU 2017-08 is effective for fiscal years beginning after December 15, 2018 and interim periods within those fiscal years, and early adoption is permitted, including in an interim period. If early adopted in an interim period, any adjustments should be reflected as of the beginning of the fiscal year that includes that interim period. ASU 2017-08 is to be applied on a modified retrospective basis through a cumulative-effect adjustment directly to retained earnings as of the beginning of the period of adoption. We are currently evaluating the timing of adoption and do not expect the adoption of ASU 2017-08 to have a material impact on our condensed consolidated financial statements. In January 2017, the FASB issued Accounting Standards Update No. 2017-01 ("ASU 2017-01"), which clarifies the definition of a business, with the objective of adding guidance to assist entities with evaluating whether transactions should be accounted for as acquisitions (or disposals) of assets or businesses. ASU 2017-01 is effective for fiscal years beginning after December 15, 2017 and interim periods within those fiscal years, and early adoption is permitted for transactions which occur before the issuance or effective date of the amendments, only when the transaction has not been reported in the financial statements that have been issued or made available for issuance. ASU 2017-01 is to be applied on a prospective basis. We do not intend to early adopt ASU 2017-01 and do not expect the adoption of ASU 2017-01 to have a material impact on our condensed consolidated financial statements. In August 2016, the FASB issued Accounting Standards Update No. 2016-15 ("ASU 2016-15") which addresses eight cash flow classification issues. ASU 2016-15 is effective for fiscal years beginning after December 15, 2017 and interim periods within those fiscal years, and early adoption is permitted, including in an interim period. If early adopted in an interim period, any adjustments should be reflected as of the beginning of the fiscal year that includes that interim period. Early adoption requires the adoption of all the amendments in the same period. ASU 2016-15 is to be applied through a retrospective transition method to each period presented. If it is impracticable to apply retrospectively for some of the issues, the amendments for those issues would be applied prospectively as of the earliest date practicable. We do not intend to early adopt ASU 2016-15 and do not expect the adoption of ASU 2016-15 to have a material impact on our condensed consolidated statements of cash flows. In June 2016, the FASB issued Accounting Standards Update No. 2016-13 ("ASU 2016-13") which requires measurement and recognition of expected credit losses for financial assets held. ASU 2016-13 is effective for fiscal years beginning after December 15, 2019 and interim periods within those fiscal years, and early adoption is permitted as of the fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. ASU 2016-13 is to be applied through a cumulative-effect adjustment to retained earnings as of the beginning of the first reporting period in which the guidance is effective. We are currently evaluating the timing and the impact of adopting ASU 2016-13 on our condensed consolidated financial statements. In February 2016, the FASB issued Accounting Standards Update No. 2016-02 ("Topic 842") to amend lease accounting requirements and requires entities to generally recognize on the balance sheet operating and financing lease liabilities and corresponding right-of-use assets. Topic 842 will require significant additional disclosures about the amount, timing and uncertainty of cash flows from leases. Topic 842 is effective for fiscal years beginning after December 15, 2018 and interim periods within those years, and early adoption is permitted. Topic 842 is to be applied using a modified retrospective approach and includes a number of optional practical expedients that entities may elect to apply. We are currently evaluating the timing and the impact of adopting Topic 842 on our condensed consolidated financial statements and expect that most of our operating lease commitments will be subject to Topic 842 and recognized as operating lease liabilities and right-of-use assets upon the adoption. In January 2016, the FASB issued Accounting Standards Update No. 2016-01 ("ASU 2016-01") to enhance the reporting model for financial instruments by amending certain aspects of recognition, measurement, presentation and disclosure of financial instruments. ASU 2016-01 is effective for fiscal years beginning after December 15, 2017 and interim periods within those years. Early application to financial statements of fiscal years or interim periods that have not yet been issued is permitted by presenting separately in other comprehensive income the portion of the total change in the fair value of a liability resulting from a change in the instrument-specific credit risk if we elected to measure the liability at fair value in accordance with the fair value option for financial instruments, otherwise, early adoption is not permitted. ASU 2016-01 is to be applied with a cumulative-effect adjustment to the balance sheet as of the beginning of the fiscal year of adoption. The amendments related to equity securities without readily determinable fair values (including disclosure requirements) should be applied prospectively to equity investments that exist as of the date of adoption. We are currently evaluating the impact of adopting ASU 2016-01 on our condensed consolidated financial statements. In May 2014, the FASB issued Accounting Standards Update No. 2014-09 ("Topic 606") which completed the joint effort by the FASB and the International Accounting Standards Board to clarify the principles for recognizing revenue and improving financial reporting. Topic 606 also provides guidance on the recognition of costs related to obtaining and fulfilling customer contracts. The FASB issued subsequent amendments to the initial guidance collectively under Topic 606. Topic 606 supersedes nearly all existing revenue recognition guidance under GAAP. The core principle of Topic 606 is to recognize revenues when promised goods or services are transferred to customers in an amount that reflects the consideration that is expected to be received for those goods or services. Topic 606 defines a five-step process to achieve this core principle, and more judgment and estimates may be required under the Topic 606 revenue recognition process than are required under existing GAAP, including identifying performance obligations in the contract, estimating the amount of variable consideration to include in the transaction price and allocating the transaction price to each separate performance obligation, among others. Topic 606 is required to be effective for us on March 1, 2018. Topic 606 allows for either full retrospective adoption applied to all periods presented or modified adoption with the cumulative effect of initially applying Topic 606 recognized at the date of initial application. We are currently considering adopting using the full retrospective approach; however, our final decision will depend on a number of factors such as the significance of the impact of the new standard on our financial results, system readiness and our ability to accumulate and analyze the information necessary to assess the impact on prior period financial statements, as necessary. Currently, we are in the process of reviewing our historical contracts and evaluating the impact of Topic 606 on our accounting policies, processes and system requirements, and have assigned internal resources and engaged third-party service providers to assist in our evaluation. Furthermore, we will continue to make investments in systems to enable timely and accurate reporting under the new standard. While we continue to assess all potential impacts under the new standard, there is the potential for significant changes to the pattern of revenue recognition for our arrangements resulting from, for example, the identification of performance obligations, inclusion of variable consideration in the transaction price, allocation of the transaction price based on relative standalone selling prices, timing of recognition, accounting for contract acquisition costs, among other areas, as well as the related financial statement disclosures. With respect to contract acquisition costs, we preliminarily believe that we will capitalize additional costs of obtaining the contract, including additional sales commissions, as the new cost guidance, as interpreted by the FASB Transition Resource Group for Revenue Recognition, requires the capitalization of all incremental costs that we incur to obtain a contract with a customer that we would not have incurred if the contract had not been obtained, provided we expect to recover the costs. Under our current accounting policy, we would only capitalize such costs if they are both incremental and directly related to acquiring the customer. As we are in the initial stages of our evaluation of the impact of the new standard and the impact on our accounting policies across our multiple solutions, we do not know or cannot reasonably estimate quantitative information related to the impact of Topic 606 on our consolidated financial statements, including the effect on our operating results and our accounting for deferred commission balances, at this time.

Balance Sheet Information

Balance Sheet Information	6 Months Ended
	Aug. 31, 2017
Balance Sheet Information [Abstract]
Balance Sheet Information	Balance Sheet Information Cash, Cash Equivalents and Restricted Cash The following table summarizes our cash, cash equivalents and restricted cash by category (in thousands): As of August 31, 2017 As of February 28, 2017 Cash and cash equivalents: Cash $ 109,582 $ 103,726 Money market funds 16,003 16,468 Other non-current assets: Restricted cash 660 643 $ 126,245 $ 120,837 Restricted cash is primarily related to customs obligations and letters of credit associated with our leases. Marketable Securities The following tables summarize our marketable securities by category (in thousands): As of August 31, 2017 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Asset-backed securities $ 9,472 $ 9 $ (13 ) $ 9,468 Corporate debt securities 43,768 22 (94 ) 43,696 Foreign government bonds 650 1 — 651 Mortgage-backed securities 3,404 2 (7 ) 3,399 U.S. government agency securities 13,679 6 (38 ) 13,647 U.S. government notes 10,136 6 (12 ) 10,130 $ 81,109 $ 46 $ (164 ) $ 80,991 As of February 28, 2017 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Asset-backed securities $ 9,597 $ 6 $ (28 ) $ 9,575 Corporate debt securities 41,822 11 (140 ) 41,693 Foreign government bonds 650 — (1 ) 649 Mortgage-backed securities 3,324 — (22 ) 3,302 U.S. government agency securities 12,707 1 (77 ) 12,631 U.S. government notes 12,092 2 (29 ) 12,065 $ 80,192 $ 20 $ (297 ) $ 79,915 We use the specific-identification method to determine any realized gains or losses from the sale of our marketable securities classified as available-for-sale. For the three and six months ended August 31, 2017 , realized gross gains and losses were insignificant . For the three and six months ended August 31, 2016 , we realized gross gains of $0.7 million and $1.1 million , respectively, and an insignificant amount of gross losses. We reflect these gains and losses as a component of other income, net in our condensed consolidated statements of income. The following tables present gross unrealized losses and fair values for those marketable securities that were in an unrealized loss position aggregated by investment category and the length of time that individual securities have been in a continuous loss position (in thousands): As of August 31, 2017 Less Than 12 Months 12 Months or Greater Total Fair Unrealized Fair Value Unrealized Fair Value Unrealized Asset-backed securities $ 5,809 $ (13 ) $ — $ — $ 5,809 $ (13 ) Corporate debt securities 30,297 (88 ) 3,000 (7 ) 33,297 (95 ) Mortgage-backed securities 1,914 (6 ) 131 — 2,045 (6 ) U.S. government agency securities 7,817 (22 ) 4,008 (16 ) 11,825 (38 ) U.S. government notes 4,493 (9 ) 398 (3 ) 4,891 (12 ) $ 50,330 $ (138 ) $ 7,537 $ (26 ) $ 57,867 $ (164 ) As of February 28, 2017 Less Than 12 Months 12 Months or Greater Total Fair Unrealized Fair Value Unrealized Fair Value Unrealized Asset-backed securities $ 6,086 $ (28 ) $ — $ — $ 6,086 $ (28 ) Corporate debt securities 35,095 (140 ) — — 35,095 (140 ) Foreign government bonds 650 (1 ) — — 650 (1 ) Mortgage-backed securities 3,204 (22 ) — — 3,204 (22 ) U.S. government agency securities 11,306 (65 ) 731 (12 ) 12,037 (77 ) U.S. government notes 7,265 (29 ) — — 7,265 (29 ) $ 63,606 $ (285 ) $ 731 $ (12 ) $ 64,337 $ (297 ) We periodically review our marketable securities for other-than-temporary impairment. We consider factors such as the duration, severity and the reason for the decline in value, the potential recovery period and whether we intend to sell. For marketable debt securities, we also consider whether (i) it is more likely than not that we will be required to sell the debt securities before recovery of their amortized cost basis and (ii) the amortized cost basis cannot be recovered as a result of credit losses. Unrealized losses related to these investments are due to interest rate fluctuations as opposed to changes in credit quality. We do not intend to sell and it is not more likely than not that we would be required to sell these investments before recovery of their amortized cost basis, which may be at maturity. As of August 31, 2017 , we have recognized no other-than-temporary impairment loss. The following table summarizes the estimated fair value of our investments in marketable debt securities by contractual maturities (in thousands): As of August 31, 2017 Due in 1 year $ 21,434 Due in 1 year through 5 years 52,893 Due in 5 years through 10 years 3,020 Due after 10 years 3,644 $ 80,991 Fair Value Measurements We determine fair value based on the fair value hierarchy, which requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. The fair value assumes that the transaction to sell the asset or transfer the liability occurs in the principal or most advantageous market for the asset or liability and establishes that the fair value of an asset or liability shall be determined based on the assumptions that market participants would use in pricing the asset or liability. The classification of a financial asset or liability within the hierarchy is based upon the lowest level input that is significant to the fair value measurement. The fair value hierarchy prioritizes the inputs into three levels that may be used to measure fair value: Level 1: Inputs are unadjusted quoted prices in active markets for identical assets or liabilities. Level 2: Inputs are quoted prices for similar assets and liabilities in active markets or inputs that are observable for the asset or liability, either directly or indirectly through market corroboration, for substantially the full term of the financial instrument. Level 3: Inputs are unobservable inputs based on our assumptions. Cash equivalents and marketable equity securities are classified within Level 1 because they are valued using quoted market prices or alternative pricing sources and models utilizing market observable inputs. Marketable debt securities and derivative assets are classified within Level 2 if the investments are valued using model driven valuations which use observable inputs such as quoted market prices, benchmark yields, reported trades, broker/dealer quotes or alternative pricing sources with reasonable levels of price transparency. Our marketable securities are held by custodians who obtain investment prices from a third-party pricing provider that incorporates standard inputs in various asset price models. We estimated the fair value of our Level 3 contingent consideration liabilities based on a weighted probability assessment of achieving the milestones related to certain of our acquisitions. Significant increases (decreases) in the probability assumptions in isolation would result in a significantly higher (lower) fair value measurement. In developing these estimates, we considered unobservable inputs that are supported by little or no market activity and reflect our own assumptions. Financial assets and liabilities measured at fair value on a recurring basis are summarized below (in thousands): As of August 31, 2017 Level 1 Level 2 Level 3 Total Cash equivalents: Money market funds $ 16,003 $ — $ — $ 16,003 Marketable securities: Asset-backed securities $ — $ 9,468 $ — $ 9,468 Corporate debt securities $ — $ 43,696 $ — $ 43,696 Foreign government bonds $ — $ 651 $ — $ 651 Mortgage-backed securities $ — $ 3,399 $ — $ 3,399 U.S. government agency securities $ — $ 13,647 $ — $ 13,647 U.S. government notes $ — $ 10,130 $ — $ 10,130 As of February 28, 2017 Level 1 Level 2 Level 3 Total Cash equivalents: Money market funds $ 16,468 $ — $ — $ 16,468 Marketable securities: Asset-backed securities $ — $ 9,575 $ — $ 9,575 Corporate debt securities $ — $ 41,693 $ — $ 41,693 Foreign government bonds $ — $ 649 $ — $ 649 Mortgage-backed securities $ — $ 3,302 $ — $ 3,302 U.S. government agency securities $ — $ 12,631 $ — $ 12,631 U.S. government notes $ — $ 12,065 $ — $ 12,065 Other accrued liabilities (current): Contingent consideration $ — $ — $ 902 $ 902 The following table summarizes the change in fair value of our Level 3 contingent consideration amounts (in thousands): Balance as of February 28, 2017 $ 902 Total remeasurement recognized in earnings (160 ) Settlements (742 ) Balance as of August 31, 2017 $ — For the six months ended August 31, 2017 , the contingent consideration remeasurement was recognized within research and development expense in our condensed consolidated statements of income. Inventories, Net Inventories, net consisted of the following (in thousands): As of August 31, 2017 As of February 28, 2017 Raw materials $ 3,787 $ 3,479 Finished goods 3,275 2,878 Reserves (542 ) (510 ) $ 6,520 $ 5,847 Deferred Costs Deferred costs consisted of the following (in thousands): As of August 31, 2017 As of February 28, 2017 Appliance $ 40,561 $ 39,474 Commissions 23,891 20,409 $ 64,452 $ 59,883 Property and Equipment, Net Property and equipment, net consisted of the following (in thousands): As of August 31, 2017 As of February 28, 2017 Land $ 9,849 $ 9,849 Building 6,549 6,549 Computer hardware and software 39,923 32,850 Vehicles, machinery and equipment 4,799 4,797 Leasehold improvements 4,492 4,379 65,612 58,424 Accumulated depreciation and amortization (33,569 ) (28,445 ) $ 32,043 $ 29,979 Depreciation and amortization expense related to property and equipment was $2.6 million and $5.1 million for the three and six months ended August 31, 2017 , respectively, and $2.3 million and $4.7 million for the three and six months ended August 31, 2016 , respectively. Accumulated Other Comprehensive Income (Loss) The components of accumulated other comprehensive income (loss) ("AOCI"), net of tax, were as follows (in thousands): Foreign Currency Translation Adjustments Unrealized Gains (Losses) on Available-for- Sale Investments Total Balance as of February 28, 2017 $ (4,954 ) $ (272 ) $ (5,226 ) Other comprehensive income before reclassifications 1,991 149 2,140 Amounts reclassified from AOCI — 10 10 Other comprehensive income 1,991 159 2,150 Balance as of August 31, 2017 $ (2,963 ) $ (113 ) $ (3,076 )

Goodwill and Intangible Assets

Goodwill and Intangible Assets	6 Months Ended
	Aug. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Intangible Assets	Goodwill and Intangible Assets The changes in the carrying amount of goodwill are summarized as follows (in thousands): Balance as of February 28, 2017 $ 69,795 Effect of foreign exchange rates 858 Balance as of August 31, 2017 $ 70,653 Intangible assets subject to amortization are summarized as follows (in thousands): As of August 31, 2017 Gross Carrying Amount Accumulated Amortization Net Carrying Value Acquired developed technology $ 50,296 $ (32,626 ) $ 17,670 Customer relationships 20,033 (10,594 ) 9,439 Patents 2,999 (1,991 ) 1,008 Trade name 812 (432 ) 380 $ 74,140 $ (45,643 ) $ 28,497 As of February 28, 2017 Gross Carrying Amount Accumulated Amortization Net Carrying Value Acquired developed technology $ 50,013 $ (30,105 ) $ 19,908 Customer relationships 19,736 (9,348 ) 10,388 Patents 2,999 (1,781 ) 1,218 Trade name 812 (375 ) 437 $ 73,560 $ (41,609 ) $ 31,951 Certain intangible assets were removed as they were fully amortized as of the periods presented above. In addition to the above, we maintained other intangible assets not subject to amortization of $0.2 million as of August 31, 2017 and February 28, 2017 . Amortization expense, including impairment charges, was $1.8 million and $3.5 million for the three and six months ended August 31, 2017 , respectively, and $1.8 million and $3.7 million for the three and six months ended August 31, 2016, respectively. As of August 31, 2017 , amortization expense for intangible assets in future periods was as follows: $3.4 million for the remainder of fiscal 2018 , $6.0 million for fiscal 2019 , $5.8 million for fiscal 2020 , $5.3 million for fiscal 2021 , $4.9 million for fiscal 2022 and $3.1 million thereafter.

Stockholders' Equity

Stockholders' Equity	6 Months Ended
	Aug. 31, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stockholders' Equity	Stockholders’ Equity Stock-Based Compensation Total stock-based compensation expense has been classified as follows in our condensed consolidated statements of income (in thousands): Three Months Ended August 31, Six Months Ended August 31, 2017 2016 2017 2016 Cost of revenue $ 496 $ 338 $ 922 $ 636 Research and development 3,121 2,608 5,808 5,072 Sales and marketing 3,400 1,943 5,534 3,791 General and administrative 2,611 3,007 4,747 6,334 $ 9,628 $ 7,896 $ 17,011 $ 15,833 As of August 31, 2017 , there was $6.1 million of unrecognized compensation cost related to outstanding stock options, expected to be recognized over a weighted-average period of 1.54 years , and $63.1 million of unrecognized compensation cost related to unvested restricted stock units ("RSUs"), expected to be recognized over a weighted-average period of 2.79 years . Our 2015 Employee Stock Purchase Plan (the "ESPP") allows eligible employee participants to purchase shares of our common stock at a discount through payroll deductions. The ESPP consists of offering periods that are six months in length and employees may purchase shares in each period at 85% of the lower of the Company’s fair market value on the first trading day of each offering period or on the purchase date. The ESPP will continue until the earlier to occur of (i) the termination of the ESPP by our board of directors, or (ii) June 15, 2035 . As of August 31, 2017 , we had reserved 750,000 shares of our common stock for issuance under the ESPP and 634,746 shares remain available for future issuance. Stock Repurchase Program In 2015, our board of directors authorized a stock repurchase program to repurchase shares of our common stock for an aggregate purchase price not to exceed $50.0 million through September 30, 2017. The following table summarizes our common stock repurchases for the periods presented (in thousands, except per share data): Three Months Ended August 31, Six Months Ended August 31, 2017 2016 2017 2016 Total number of shares repurchased — 464 331 482 Dollar amount of shares repurchased $ — $ 6,961 $ 6,546 $ 7,241 Average price paid per share $ — $ 14.99 $ 19.75 $ 15.03 Remaining amount authorized as of the period end $ 16,642 $ 23,543 $ 16,642 $ 23,543

Income Taxes

Income Taxes	6 Months Ended
	Aug. 31, 2017
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes For the three and six months ended August 31, 2017 , we recorded an income tax provision of $0.4 million and $2.9 million , respectively. For the three and six months ended August 31, 2016 , we recorded an income tax provision of $5.2 million and $8.5 million , respectively. We maintain a valuation allowance against a significant portion of our deferred tax assets, including U.S. federal and state deferred tax assets and certain foreign deferred tax assets, because realization of these tax benefits through future taxable income did not meet the more-likely-than-not threshold. We intend to maintain the valuation allowance until sufficient positive evidence exists to support its reversal. The difference between the income tax provision that would be derived by applying the statutory rate to our before tax income for the three and six months ended August 31, 2017 and the income tax provision actually recorded is primarily due to the temporary differences we do not expect to benefit from due to our valuation allowance, as well as non-deductible stock-based compensation expense and other currently non-deductible items.

Borrowings

Borrowings	6 Months Ended
	Aug. 31, 2017
Debt Disclosure [Abstract]
Borrowings	Borrowings Credit Facility We have a $25.0 million credit facility with Silicon Valley Bank ("SVB"), which expires in November 2017. The credit facility includes an option to request an increase of the available funds to $50.0 million and is secured by a security interest on substantially all of our assets and contains restrictive covenants. Upon drawing the credit facility, the financial covenants will require us to maintain a minimum adjusted EBITDA, as defined in the credit facility, and a minimum adjusted quick ratio. The credit facility also sets forth specified events of default. No amounts had been drawn under the credit facility through August 31, 2017 .

Segment Information

Segment Information	6 Months Ended
	Aug. 31, 2017
Segment Reporting [Abstract]
Segment Information	Segment Information Operating segments are defined as components of an enterprise about which separate financial information is available that is evaluated regularly by the chief operating decision maker in deciding how to allocate resources and in assessing performance. Our chief operating decision maker is our chief executive officer. Our chief executive officer reviews financial information presented on a consolidated basis, accompanied by information about sales by geographic region, for purposes of allocating resources and evaluating financial performance. We have one business activity and there are no segment managers who are held accountable for operations, operating results and plans for levels or components below the consolidated level. Accordingly, we have determined that we have a single reportable segment and operating segment structure. Revenue by geographic region is based on our customers' billing addresses and is presented as follows (in thousands): Three Months Ended August 31, Six Months Ended August 31, 2017 2016 2017 2016 North America $ 70,384 $ 65,855 $ 140,571 $ 130,952 United States 66,595 62,413 132,857 124,006 Other 3,789 3,442 7,714 6,946 Latin America 1,324 1,225 2,641 2,350 Asia-Pacific 6,010 5,235 11,932 10,284 EMEA 16,607 15,615 33,360 30,998 $ 94,325 $ 87,930 $ 188,504 $ 174,584

Commitments and Contingencies

Commitments and Contingencies	6 Months Ended
	Aug. 31, 2017
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Legal Matters On February 27, 2017, Realtime Data LLC ("Realtime Data") filed a lawsuit against us in the United States District Court for the Eastern District of Texas, Tyler Division, alleging that certain of our products infringe U.S. patent numbers 9,054,728, 7,415,530, 9,116,908 and 8,717,204 (the “First Realtime Matter”). On June 2, 2017, we filed a motion to dismiss for improper venue, and on September 22, 2017, we filed a motion to transfer venue of the action from the Eastern District of Texas to the Northern District of California. On July 5, 2017, Realtime Data filed a second lawsuit related to the same patents and products in the United States District Court for the District of Delaware. On September 14, 2017, Realtime Data dismissed the Delaware action without prejudice. Given the early stage of the First Realtime Matter, we are unable to estimate a possible loss or range of possible loss, if any. We may, from time to time, be party to litigation and subject to claims that arise in the ordinary course of business. In addition, third parties may, from time to time, assert claims against us in the form of letters and other communications. We currently believe that these ordinary course matters will not have a material adverse effect on our business, consolidated financial position, results of operations or cash flows; however, the results of litigation and claims are inherently unpredictable. Regardless of the outcome, litigation can have an adverse impact on us because of defense and settlement costs, diversion of management resources and other factors.

Net Income Per Share

Net Income Per Share	6 Months Ended
	Aug. 31, 2017
Earnings Per Share [Abstract]
Net Income Per Share	Net Income Per Share The following table presents the calculation of basic and diluted net income per share (in thousands, except per share amounts): Three Months Ended August 31, Six Months Ended August 31, 2017 2016 2017 2016 Net income $ 1,554 $ 2,437 $ 4,226 $ 5,221 Weighted-average shares used to compute net income per share, basic 53,040 52,265 52,958 52,275 Dilutive shares from stock options and RSUs 1,569 1,056 1,512 813 Weighted-average shares used to compute net income per share, diluted 54,609 53,321 54,470 53,088 Net income per share, basic $ 0.03 $ 0.05 $ 0.08 $ 0.10 Net income per share, diluted $ 0.03 $ 0.05 $ 0.08 $ 0.10

Overview and Basis of Present17

Overview and Basis of Presentation (Policies)	6 Months Ended
	Aug. 31, 2017
Accounting Policies [Abstract]
Nature of Operations	Nature of Operations Barracuda Networks, Inc., also referred to in this report as "we," "our," "us," "Barracuda" or "the Company," is headquartered in Campbell, California, and designs and delivers powerful yet easy-to-use security and data protection solutions. We offer cloud-enabled solutions that help our customers address security threats, improve network performance and protect and store their data. Our solutions are designed to simplify IT operations for our customers, allowing them to enhance their return on technology investments.
Use of Estimates	Use of Estimates The preparation of financial statements in conformity with generally accepted accounting principles in the United States ("GAAP") requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the reporting period. We evaluate our estimates on an ongoing basis, including those related to the fair values of stock-based awards, taxes and contingent liabilities, among others. We base our estimates on historical experience and on various other assumptions that we believe to be reasonable, the results of which form the basis for making judgments about the carrying values of assets and liabilities. Actual results could differ from those estimates and such differences could be material to our condensed consolidated financial position and results of operations.
Basis of Presentation	Basis of Presentation The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with GAAP, and follow the requirements of the U.S. Securities and Exchange Commission (the "SEC") for interim reporting. As permitted under those rules, certain footnotes or other financial information that are normally required by GAAP are condensed or omitted. In management’s opinion, the unaudited condensed financial statements have been prepared on the same basis as the audited financial statements and include all adjustments, which include only normal recurring adjustments, necessary for the fair presentation of our financial information. The results for the three and six months ended August 31, 2017 are not necessarily indicative of the results expected for the full fiscal year. The condensed consolidated balance sheet as of February 28, 2017 has been derived from audited financial statements at that date but does not include all of the information required by GAAP. The accompanying unaudited condensed consolidated financial statements include the accounts of Barracuda Networks, Inc. and our wholly owned subsidiaries. All significant intercompany accounts and transactions have been eliminated. The accompanying unaudited condensed consolidated financial statements and related financial information should be read in conjunction with the audited financial statements and related footnotes included in our most recent Annual Report on Form 10-K. There have been no material changes in our significant accounting policies from those that were disclosed in our Annual Report on Form 10-K for the fiscal year ended February 28, 2017 .
Foreign Currency	Foreign Currency For those subsidiaries whose functional currency is not the U.S. dollar, assets and liabilities are translated into U.S. dollar equivalents at the exchange rate in effect on the balance sheet date and revenues and expenses are translated into U.S. dollars using the average exchange rate over the period. Resulting currency translation adjustments are recorded in accumulated other comprehensive loss in our condensed consolidated balance sheets. We recorded net gains resulting from foreign exchange transactions of $0.9 million and 1.9 million for the three and six months ended August 31, 2017 , respectively, and $0.9 million and $1.4 million for the three and six months ended August 31, 2016 , respectively, which were reflected as a component of other income, net in our condensed consolidated statements of income. We have foreign subsidiaries that operate and sell our products in various markets around the world. As a result, we are exposed to foreign exchange risks. We utilize foreign exchange forward contracts to manage foreign currency risk associated with foreign currency denominated monetary assets and liabilities, primarily trade receivables, and to reduce the volatility of earnings and cash flows related to foreign currency transactions. The fair values of our contracts as of August 31, 2017 and February 28, 2017 were not significant. The change in the fair value of these foreign currency forward contracts is recorded as gains (losses) in other income, net in our condensed consolidated statements of income.
Recently Adopted and Issued Accounting Pronouncements	Recently Adopted Accounting Pronouncements On March 1, 2017, we adopted Accounting Standards Update No. 2016-09 ("ASU 2016-09"), which simplifies several aspects of employee share-based payment accounting. The impact of the adoption on our condensed consolidated financial statements was as follows: • Forfeitures: Under the new standard, we can make an accounting policy election to either estimate the number of share-based awards that are expected to vest or account for forfeitures when they occur. We elected to account for forfeitures when they occur and adopted this change on a modified retrospective basis. As a result, we recorded the cumulative effect of the change as a $0.4 million increase to the March 1, 2017 opening accumulated deficit balance on our condensed consolidated balance sheets. • Income tax accounting: The standard eliminates additional paid-in-capital ("APIC") pools and requires excess tax benefits and tax deficiencies on share-based awards to be recognized in the statement of income prospectively when share-based awards vest or are settled. The standard also requires excess tax benefits to be recognized regardless of whether the benefit reduces taxes payable. We adopted the guidance related to the timing of previously unrecognized excess tax benefits, which resulted in no impact to the March 1, 2017 opening accumulated deficit balance on our condensed consolidated balance sheets. • Net income per share: Because excess tax benefits are no longer recognized in APIC, the assumed proceeds from applying the treasury stock method when calculating dilutive shares was amended to exclude the amount of excess tax benefits that would be recognized upon exercise or vesting of such awards. As a result, this reduces the assumed shares to be repurchased under the treasury stock method, thereby increasing the amount of dilutive shares used to compute earnings per share. We adopted the guidance related to the exclusion of excess tax benefits in calculating net income per share on a prospective basis, with an insignificant impact. • Cash flow presentation of excess tax benefits: Prior to the new standard, we were required to present excess tax benefits on share-based awards as a cash inflow from financing activities with a corresponding cash outflow from operating activities. The new standard required that these excess tax benefits be classified as an operating activity. We adopted the guidance related to the presentation of excess tax benefits in our condensed consolidated statements of cash flows on a prospective basis with an insignificant impact, while the prior period presented has not been adjusted. In January 2017, the Financial Accounting Standards Board (the "FASB") issued Accounting Standards Update No. 2017-04 ("ASU 2017-04"), which eliminates Step 2 from the goodwill impairment test. Under ASU 2017-04, an entity should perform its annual, or interim, goodwill impairment test by comparing the fair value of a reporting unit with its carrying amount. An entity should recognize an impairment charge for the amount by which the carrying amount exceeds the reporting unit’s fair value; however, the loss recognized should not exceed the total amount of goodwill allocated to that reporting unit. Additionally, an entity should consider income tax effects from any tax deductible goodwill on the carrying amount of the reporting unit when measuring the goodwill impairment loss, if applicable. ASU 2017-04 is effective for annual or any interim goodwill impairment tests in fiscal years beginning after December 15, 2019. We early adopted ASU 2017-04 for impairment tests to be performed on testing dates after January 1, 2017, which did not impact our condensed consolidated financial statements. In November 2016, the FASB issued Accounting Standards Update No. 2016-18 ("ASU 2016-18"), which requires the statement of cash flows to explain the change during the period in the total of cash, cash equivalents, and amounts generally described as restricted cash or restricted cash equivalents. ASU 2016-18 is effective for fiscal years beginning after December 15, 2017. We early adopted ASU 2016-18 retrospectively, effective March 1, 2017. Net cash flows for the six months ended August 31, 2016 did not significantly change as a result of including restricted cash with cash and cash equivalents when reconciling the beginning-of-period and end-of-period total amounts shown on our condensed consolidated statements of cash flows. Recent Accounting Pronouncements In May 2017, the FASB issued Accounting Standards Update No. 2017-09 ("ASU 2017-09"), which provides guidance about which changes to the terms or conditions of a share-based payment award require an entity to apply modification accounting in Topic 718. ASU 2017-09 is effective for fiscal years beginning after December 15, 2017 and interim periods within those fiscal years, and early adoption is permitted, including in an interim period. ASU 2017-09 is to be applied on a prospective basis to an award modified on or after the adoption date. We do not intend to early adopt ASU 2017-09 and do not expect the adoption of ASU 2017-09 to have a material impact on our condensed consolidated financial statements. In March 2017, the FASB issued Accounting Standards Update No. 2017-08 ("ASU 2017-08"), which shortens the amortization period for certain callable debt securities held at a premium and requires the premium to be amortized to the earliest call date. ASU 2017-08 is effective for fiscal years beginning after December 15, 2018 and interim periods within those fiscal years, and early adoption is permitted, including in an interim period. If early adopted in an interim period, any adjustments should be reflected as of the beginning of the fiscal year that includes that interim period. ASU 2017-08 is to be applied on a modified retrospective basis through a cumulative-effect adjustment directly to retained earnings as of the beginning of the period of adoption. We are currently evaluating the timing of adoption and do not expect the adoption of ASU 2017-08 to have a material impact on our condensed consolidated financial statements. In January 2017, the FASB issued Accounting Standards Update No. 2017-01 ("ASU 2017-01"), which clarifies the definition of a business, with the objective of adding guidance to assist entities with evaluating whether transactions should be accounted for as acquisitions (or disposals) of assets or businesses. ASU 2017-01 is effective for fiscal years beginning after December 15, 2017 and interim periods within those fiscal years, and early adoption is permitted for transactions which occur before the issuance or effective date of the amendments, only when the transaction has not been reported in the financial statements that have been issued or made available for issuance. ASU 2017-01 is to be applied on a prospective basis. We do not intend to early adopt ASU 2017-01 and do not expect the adoption of ASU 2017-01 to have a material impact on our condensed consolidated financial statements. In August 2016, the FASB issued Accounting Standards Update No. 2016-15 ("ASU 2016-15") which addresses eight cash flow classification issues. ASU 2016-15 is effective for fiscal years beginning after December 15, 2017 and interim periods within those fiscal years, and early adoption is permitted, including in an interim period. If early adopted in an interim period, any adjustments should be reflected as of the beginning of the fiscal year that includes that interim period. Early adoption requires the adoption of all the amendments in the same period. ASU 2016-15 is to be applied through a retrospective transition method to each period presented. If it is impracticable to apply retrospectively for some of the issues, the amendments for those issues would be applied prospectively as of the earliest date practicable. We do not intend to early adopt ASU 2016-15 and do not expect the adoption of ASU 2016-15 to have a material impact on our condensed consolidated statements of cash flows. In June 2016, the FASB issued Accounting Standards Update No. 2016-13 ("ASU 2016-13") which requires measurement and recognition of expected credit losses for financial assets held. ASU 2016-13 is effective for fiscal years beginning after December 15, 2019 and interim periods within those fiscal years, and early adoption is permitted as of the fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. ASU 2016-13 is to be applied through a cumulative-effect adjustment to retained earnings as of the beginning of the first reporting period in which the guidance is effective. We are currently evaluating the timing and the impact of adopting ASU 2016-13 on our condensed consolidated financial statements. In February 2016, the FASB issued Accounting Standards Update No. 2016-02 ("Topic 842") to amend lease accounting requirements and requires entities to generally recognize on the balance sheet operating and financing lease liabilities and corresponding right-of-use assets. Topic 842 will require significant additional disclosures about the amount, timing and uncertainty of cash flows from leases. Topic 842 is effective for fiscal years beginning after December 15, 2018 and interim periods within those years, and early adoption is permitted. Topic 842 is to be applied using a modified retrospective approach and includes a number of optional practical expedients that entities may elect to apply. We are currently evaluating the timing and the impact of adopting Topic 842 on our condensed consolidated financial statements and expect that most of our operating lease commitments will be subject to Topic 842 and recognized as operating lease liabilities and right-of-use assets upon the adoption. In January 2016, the FASB issued Accounting Standards Update No. 2016-01 ("ASU 2016-01") to enhance the reporting model for financial instruments by amending certain aspects of recognition, measurement, presentation and disclosure of financial instruments. ASU 2016-01 is effective for fiscal years beginning after December 15, 2017 and interim periods within those years. Early application to financial statements of fiscal years or interim periods that have not yet been issued is permitted by presenting separately in other comprehensive income the portion of the total change in the fair value of a liability resulting from a change in the instrument-specific credit risk if we elected to measure the liability at fair value in accordance with the fair value option for financial instruments, otherwise, early adoption is not permitted. ASU 2016-01 is to be applied with a cumulative-effect adjustment to the balance sheet as of the beginning of the fiscal year of adoption. The amendments related to equity securities without readily determinable fair values (including disclosure requirements) should be applied prospectively to equity investments that exist as of the date of adoption. We are currently evaluating the impact of adopting ASU 2016-01 on our condensed consolidated financial statements. In May 2014, the FASB issued Accounting Standards Update No. 2014-09 ("Topic 606") which completed the joint effort by the FASB and the International Accounting Standards Board to clarify the principles for recognizing revenue and improving financial reporting. Topic 606 also provides guidance on the recognition of costs related to obtaining and fulfilling customer contracts. The FASB issued subsequent amendments to the initial guidance collectively under Topic 606. Topic 606 supersedes nearly all existing revenue recognition guidance under GAAP. The core principle of Topic 606 is to recognize revenues when promised goods or services are transferred to customers in an amount that reflects the consideration that is expected to be received for those goods or services. Topic 606 defines a five-step process to achieve this core principle, and more judgment and estimates may be required under the Topic 606 revenue recognition process than are required under existing GAAP, including identifying performance obligations in the contract, estimating the amount of variable consideration to include in the transaction price and allocating the transaction price to each separate performance obligation, among others. Topic 606 is required to be effective for us on March 1, 2018. Topic 606 allows for either full retrospective adoption applied to all periods presented or modified adoption with the cumulative effect of initially applying Topic 606 recognized at the date of initial application. We are currently considering adopting using the full retrospective approach; however, our final decision will depend on a number of factors such as the significance of the impact of the new standard on our financial results, system readiness and our ability to accumulate and analyze the information necessary to assess the impact on prior period financial statements, as necessary. Currently, we are in the process of reviewing our historical contracts and evaluating the impact of Topic 606 on our accounting policies, processes and system requirements, and have assigned internal resources and engaged third-party service providers to assist in our evaluation. Furthermore, we will continue to make investments in systems to enable timely and accurate reporting under the new standard. While we continue to assess all potential impacts under the new standard, there is the potential for significant changes to the pattern of revenue recognition for our arrangements resulting from, for example, the identification of performance obligations, inclusion of variable consideration in the transaction price, allocation of the transaction price based on relative standalone selling prices, timing of recognition, accounting for contract acquisition costs, among other areas, as well as the related financial statement disclosures. With respect to contract acquisition costs, we preliminarily believe that we will capitalize additional costs of obtaining the contract, including additional sales commissions, as the new cost guidance, as interpreted by the FASB Transition Resource Group for Revenue Recognition, requires the capitalization of all incremental costs that we incur to obtain a contract with a customer that we would not have incurred if the contract had not been obtained, provided we expect to recover the costs. Under our current accounting policy, we would only capitalize such costs if they are both incremental and directly related to acquiring the customer. As we are in the initial stages of our evaluation of the impact of the new standard and the impact on our accounting policies across our multiple solutions, we do not know or cannot reasonably estimate quantitative information related to the impact of Topic 606 on our consolidated financial statements, including the effect on our operating results and our accounting for deferred commission balances, at this time.
Fair Value Measurements	Fair Value Measurements We determine fair value based on the fair value hierarchy, which requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. The fair value assumes that the transaction to sell the asset or transfer the liability occurs in the principal or most advantageous market for the asset or liability and establishes that the fair value of an asset or liability shall be determined based on the assumptions that market participants would use in pricing the asset or liability. The classification of a financial asset or liability within the hierarchy is based upon the lowest level input that is significant to the fair value measurement. The fair value hierarchy prioritizes the inputs into three levels that may be used to measure fair value: Level 1: Inputs are unadjusted quoted prices in active markets for identical assets or liabilities. Level 2: Inputs are quoted prices for similar assets and liabilities in active markets or inputs that are observable for the asset or liability, either directly or indirectly through market corroboration, for substantially the full term of the financial instrument. Level 3: Inputs are unobservable inputs based on our assumptions. Cash equivalents and marketable equity securities are classified within Level 1 because they are valued using quoted market prices or alternative pricing sources and models utilizing market observable inputs. Marketable debt securities and derivative assets are classified within Level 2 if the investments are valued using model driven valuations which use observable inputs such as quoted market prices, benchmark yields, reported trades, broker/dealer quotes or alternative pricing sources with reasonable levels of price transparency. Our marketable securities are held by custodians who obtain investment prices from a third-party pricing provider that incorporates standard inputs in various asset price models. We estimated the fair value of our Level 3 contingent consideration liabilities based on a weighted probability assessment of achieving the milestones related to certain of our acquisitions. Significant increases (decreases) in the probability assumptions in isolation would result in a significantly higher (lower) fair value measurement. In developing these estimates, we considered unobservable inputs that are supported by little or no market activity and reflect our own assumptions.
Segment Information	Operating segments are defined as components of an enterprise about which separate financial information is available that is evaluated regularly by the chief operating decision maker in deciding how to allocate resources and in assessing performance. Our chief operating decision maker is our chief executive officer. Our chief executive officer reviews financial information presented on a consolidated basis, accompanied by information about sales by geographic region, for purposes of allocating resources and evaluating financial performance. We have one business activity and there are no segment managers who are held accountable for operations, operating results and plans for levels or components below the consolidated level. Accordingly, we have determined that we have a single reportable segment and operating segment structure.

Balance Sheet Information (Tabl

Balance Sheet Information (Tables)	6 Months Ended
	Aug. 31, 2017
Balance Sheet Information [Abstract]
Cash and Cash Equivalents	The following table summarizes our cash, cash equivalents and restricted cash by category (in thousands): As of August 31, 2017 As of February 28, 2017 Cash and cash equivalents: Cash $ 109,582 $ 103,726 Money market funds 16,003 16,468 Other non-current assets: Restricted cash 660 643 $ 126,245 $ 120,837
Marketable Securities	The following tables summarize our marketable securities by category (in thousands): As of August 31, 2017 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Asset-backed securities $ 9,472 $ 9 $ (13 ) $ 9,468 Corporate debt securities 43,768 22 (94 ) 43,696 Foreign government bonds 650 1 — 651 Mortgage-backed securities 3,404 2 (7 ) 3,399 U.S. government agency securities 13,679 6 (38 ) 13,647 U.S. government notes 10,136 6 (12 ) 10,130 $ 81,109 $ 46 $ (164 ) $ 80,991 As of February 28, 2017 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Asset-backed securities $ 9,597 $ 6 $ (28 ) $ 9,575 Corporate debt securities 41,822 11 (140 ) 41,693 Foreign government bonds 650 — (1 ) 649 Mortgage-backed securities 3,324 — (22 ) 3,302 U.S. government agency securities 12,707 1 (77 ) 12,631 U.S. government notes 12,092 2 (29 ) 12,065 $ 80,192 $ 20 $ (297 ) $ 79,915
Summary of Securities with Gross Unrealized Loss Positions and Fair Values	The following tables present gross unrealized losses and fair values for those marketable securities that were in an unrealized loss position aggregated by investment category and the length of time that individual securities have been in a continuous loss position (in thousands): As of August 31, 2017 Less Than 12 Months 12 Months or Greater Total Fair Unrealized Fair Value Unrealized Fair Value Unrealized Asset-backed securities $ 5,809 $ (13 ) $ — $ — $ 5,809 $ (13 ) Corporate debt securities 30,297 (88 ) 3,000 (7 ) 33,297 (95 ) Mortgage-backed securities 1,914 (6 ) 131 — 2,045 (6 ) U.S. government agency securities 7,817 (22 ) 4,008 (16 ) 11,825 (38 ) U.S. government notes 4,493 (9 ) 398 (3 ) 4,891 (12 ) $ 50,330 $ (138 ) $ 7,537 $ (26 ) $ 57,867 $ (164 ) As of February 28, 2017 Less Than 12 Months 12 Months or Greater Total Fair Unrealized Fair Value Unrealized Fair Value Unrealized Asset-backed securities $ 6,086 $ (28 ) $ — $ — $ 6,086 $ (28 ) Corporate debt securities 35,095 (140 ) — — 35,095 (140 ) Foreign government bonds 650 (1 ) — — 650 (1 ) Mortgage-backed securities 3,204 (22 ) — — 3,204 (22 ) U.S. government agency securities 11,306 (65 ) 731 (12 ) 12,037 (77 ) U.S. government notes 7,265 (29 ) — — 7,265 (29 ) $ 63,606 $ (285 ) $ 731 $ (12 ) $ 64,337 $ (297 )
Summary of Estimated Fair Value of Investments in Marketable Debt Securities	The following table summarizes the estimated fair value of our investments in marketable debt securities by contractual maturities (in thousands): As of August 31, 2017 Due in 1 year $ 21,434 Due in 1 year through 5 years 52,893 Due in 5 years through 10 years 3,020 Due after 10 years 3,644 $ 80,991
Summary of Assets or Liabilities Measured at Fair Value	Financial assets and liabilities measured at fair value on a recurring basis are summarized below (in thousands): As of August 31, 2017 Level 1 Level 2 Level 3 Total Cash equivalents: Money market funds $ 16,003 $ — $ — $ 16,003 Marketable securities: Asset-backed securities $ — $ 9,468 $ — $ 9,468 Corporate debt securities $ — $ 43,696 $ — $ 43,696 Foreign government bonds $ — $ 651 $ — $ 651 Mortgage-backed securities $ — $ 3,399 $ — $ 3,399 U.S. government agency securities $ — $ 13,647 $ — $ 13,647 U.S. government notes $ — $ 10,130 $ — $ 10,130 As of February 28, 2017 Level 1 Level 2 Level 3 Total Cash equivalents: Money market funds $ 16,468 $ — $ — $ 16,468 Marketable securities: Asset-backed securities $ — $ 9,575 $ — $ 9,575 Corporate debt securities $ — $ 41,693 $ — $ 41,693 Foreign government bonds $ — $ 649 $ — $ 649 Mortgage-backed securities $ — $ 3,302 $ — $ 3,302 U.S. government agency securities $ — $ 12,631 $ — $ 12,631 U.S. government notes $ — $ 12,065 $ — $ 12,065 Other accrued liabilities (current): Contingent consideration $ — $ — $ 902 $ 902
Summary of the Change in Fair Value of Level 3 Contingent Consideration	The following table summarizes the change in fair value of our Level 3 contingent consideration amounts (in thousands): Balance as of February 28, 2017 $ 902 Total remeasurement recognized in earnings (160 ) Settlements (742 ) Balance as of August 31, 2017 $ —
Inventories, Net	Inventories, net consisted of the following (in thousands): As of August 31, 2017 As of February 28, 2017 Raw materials $ 3,787 $ 3,479 Finished goods 3,275 2,878 Reserves (542 ) (510 ) $ 6,520 $ 5,847
Deferred Costs	Deferred costs consisted of the following (in thousands): As of August 31, 2017 As of February 28, 2017 Appliance $ 40,561 $ 39,474 Commissions 23,891 20,409 $ 64,452 $ 59,883
Property and Equipment, Net	Property and equipment, net consisted of the following (in thousands): As of August 31, 2017 As of February 28, 2017 Land $ 9,849 $ 9,849 Building 6,549 6,549 Computer hardware and software 39,923 32,850 Vehicles, machinery and equipment 4,799 4,797 Leasehold improvements 4,492 4,379 65,612 58,424 Accumulated depreciation and amortization (33,569 ) (28,445 ) $ 32,043 $ 29,979
Components of Accumulated Other Comprehensive Income (Loss), Net of Tax	The components of accumulated other comprehensive income (loss) ("AOCI"), net of tax, were as follows (in thousands): Foreign Currency Translation Adjustments Unrealized Gains (Losses) on Available-for- Sale Investments Total Balance as of February 28, 2017 $ (4,954 ) $ (272 ) $ (5,226 ) Other comprehensive income before reclassifications 1,991 149 2,140 Amounts reclassified from AOCI — 10 10 Other comprehensive income 1,991 159 2,150 Balance as of August 31, 2017 $ (2,963 ) $ (113 ) $ (3,076 )

Goodwill and Intangible Assets

Goodwill and Intangible Assets (Tables)	6 Months Ended
	Aug. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Changes in Carrying Amount of Goodwill	The changes in the carrying amount of goodwill are summarized as follows (in thousands): Balance as of February 28, 2017 $ 69,795 Effect of foreign exchange rates 858 Balance as of August 31, 2017 $ 70,653
Schedule of Intangible Assets Subject to Amortization	Intangible assets subject to amortization are summarized as follows (in thousands): As of August 31, 2017 Gross Carrying Amount Accumulated Amortization Net Carrying Value Acquired developed technology $ 50,296 $ (32,626 ) $ 17,670 Customer relationships 20,033 (10,594 ) 9,439 Patents 2,999 (1,991 ) 1,008 Trade name 812 (432 ) 380 $ 74,140 $ (45,643 ) $ 28,497 As of February 28, 2017 Gross Carrying Amount Accumulated Amortization Net Carrying Value Acquired developed technology $ 50,013 $ (30,105 ) $ 19,908 Customer relationships 19,736 (9,348 ) 10,388 Patents 2,999 (1,781 ) 1,218 Trade name 812 (375 ) 437 $ 73,560 $ (41,609 ) $ 31,951

Stockholders' Equity (Tables)

Stockholders' Equity (Tables)	6 Months Ended
	Aug. 31, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Schedule of Total Stock-Based Compensation Expense	Total stock-based compensation expense has been classified as follows in our condensed consolidated statements of income (in thousands): Three Months Ended August 31, Six Months Ended August 31, 2017 2016 2017 2016 Cost of revenue $ 496 $ 338 $ 922 $ 636 Research and development 3,121 2,608 5,808 5,072 Sales and marketing 3,400 1,943 5,534 3,791 General and administrative 2,611 3,007 4,747 6,334 $ 9,628 $ 7,896 $ 17,011 $ 15,833
Summary of Common Stock Repurchases	The following table summarizes our common stock repurchases for the periods presented (in thousands, except per share data): Three Months Ended August 31, Six Months Ended August 31, 2017 2016 2017 2016 Total number of shares repurchased — 464 331 482 Dollar amount of shares repurchased $ — $ 6,961 $ 6,546 $ 7,241 Average price paid per share $ — $ 14.99 $ 19.75 $ 15.03 Remaining amount authorized as of the period end $ 16,642 $ 23,543 $ 16,642 $ 23,543

Segment Information (Tables)

Segment Information (Tables)	6 Months Ended
	Aug. 31, 2017
Segment Reporting [Abstract]
Schedule of Revenue by Geographic Region	Revenue by geographic region is based on our customers' billing addresses and is presented as follows (in thousands): Three Months Ended August 31, Six Months Ended August 31, 2017 2016 2017 2016 North America $ 70,384 $ 65,855 $ 140,571 $ 130,952 United States 66,595 62,413 132,857 124,006 Other 3,789 3,442 7,714 6,946 Latin America 1,324 1,225 2,641 2,350 Asia-Pacific 6,010 5,235 11,932 10,284 EMEA 16,607 15,615 33,360 30,998 $ 94,325 $ 87,930 $ 188,504 $ 174,584

Net Income Per Share (Tables)

Net Income Per Share (Tables)	6 Months Ended
	Aug. 31, 2017
Earnings Per Share [Abstract]
Calculation of Basic and Diluted Net Income Per Share	The following table presents the calculation of basic and diluted net income per share (in thousands, except per share amounts): Three Months Ended August 31, Six Months Ended August 31, 2017 2016 2017 2016 Net income $ 1,554 $ 2,437 $ 4,226 $ 5,221 Weighted-average shares used to compute net income per share, basic 53,040 52,265 52,958 52,275 Dilutive shares from stock options and RSUs 1,569 1,056 1,512 813 Weighted-average shares used to compute net income per share, diluted 54,609 53,321 54,470 53,088 Net income per share, basic $ 0.03 $ 0.05 $ 0.08 $ 0.10 Net income per share, diluted $ 0.03 $ 0.05 $ 0.08 $ 0.10

Overview and Basis of Present23

Overview and Basis of Presentation - Additional Information (Detail) - USD ($)	3 Months Ended		6 Months Ended
	Aug. 31, 2017	Aug. 31, 2016	Aug. 31, 2017	Aug. 31, 2016	Feb. 28, 2017
New Accounting Pronouncement, Early Adoption [Line Items]
Net gain (loss) from foreign exchange transactions	$ 900,000	$ 900,000	$ 1,900,000	$ 1,400,000
Retained Earnings | Accounting Standards Update 2016-09
New Accounting Pronouncement, Early Adoption [Line Items]
Cumulative effect of new accounting principle in period of adoption					$ 400,000
Additional Paid-in Capital | Accounting Standards Update 2016-09
New Accounting Pronouncement, Early Adoption [Line Items]
Cumulative effect of new accounting principle in period of adoption					$ 0

Balance Sheet Information - Cas

Balance Sheet Information - Cash and Cash Equivalents (Detail) - USD ($) $ in Thousands	Aug. 31, 2017	Feb. 28, 2017	Aug. 31, 2016	Feb. 29, 2016
Cash and cash equivalents:
Cash	$ 109,582	$ 103,726
Money market funds	16,003	16,468
Other non-current assets:
Restricted cash	660	643
Total cash and cash equivalents	$ 126,245	$ 120,837	$ 139,830	$ 119,333

Balance Sheet Information - Mar

Balance Sheet Information - Marketable Securities (Detail) - USD ($)	3 Months Ended		6 Months Ended
	Aug. 31, 2017	Aug. 31, 2016	Aug. 31, 2017	Aug. 31, 2016	Feb. 28, 2017
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 81,109,000		$ 81,109,000		$ 80,192,000
Gross Unrealized Gains	46,000		46,000		20,000
Gross Unrealized Losses	(164,000)		(164,000)		(297,000)
Fair Value	80,991,000		80,991,000		79,915,000
Other than temporary impairment losses, investments, available-for-sale securities			0
Asset-backed securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	9,472,000		9,472,000		9,597,000
Gross Unrealized Gains	9,000		9,000		6,000
Gross Unrealized Losses	(13,000)		(13,000)		(28,000)
Fair Value	9,468,000		9,468,000		9,575,000
Corporate debt securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	43,768,000		43,768,000		41,822,000
Gross Unrealized Gains	22,000		22,000		11,000
Gross Unrealized Losses	(94,000)		(94,000)		(140,000)
Fair Value	43,696,000		43,696,000		41,693,000
Foreign government bonds
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	650,000		650,000		650,000
Gross Unrealized Gains	1,000		1,000		0
Gross Unrealized Losses	0		0		(1,000)
Fair Value	651,000		651,000		649,000
Mortgage-backed securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	3,404,000		3,404,000		3,324,000
Gross Unrealized Gains	2,000		2,000		0
Gross Unrealized Losses	(7,000)		(7,000)		(22,000)
Fair Value	3,399,000		3,399,000		3,302,000
U.S. government agency securities
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	13,679,000		13,679,000		12,707,000
Gross Unrealized Gains	6,000		6,000		1,000
Gross Unrealized Losses	(38,000)		(38,000)		(77,000)
Fair Value	13,647,000		13,647,000		12,631,000
U.S. government notes
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	10,136,000		10,136,000		12,092,000
Gross Unrealized Gains	6,000		6,000		2,000
Gross Unrealized Losses	(12,000)		(12,000)		(29,000)
Fair Value	10,130,000		10,130,000		$ 12,065,000
Equity securities
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, gross realized gains	$ 0	$ 700,000		$ 1,100,000
Available-for-sale securities, gross realized losses		$ 0	$ 0	$ 0

Balance Sheet Information - Sum

Balance Sheet Information - Summary of Securities with Gross Unrealized Loss Positions and Fair Values (Detail) - USD ($) $ in Thousands	Aug. 31, 2017	Feb. 28, 2017
Schedule of Available-for-sale Securities [Line Items]
Less Than 12 Months, Fair Value	$ 50,330	$ 63,606
Less Than 12 Months, Unrealized Losses	(138)	(285)
12 Months or Greater, Fair Value	7,537	731
12 Months or Greater, Unrealized Losses	(26)	(12)
Total, Fair Value	57,867	64,337
Total, Unrealized Losses	(164)	(297)
Asset-backed securities
Schedule of Available-for-sale Securities [Line Items]
Less Than 12 Months, Fair Value	5,809	6,086
Less Than 12 Months, Unrealized Losses	(13)	(28)
12 Months or Greater, Fair Value	0	0
12 Months or Greater, Unrealized Losses	0	0
Total, Fair Value	5,809	6,086
Total, Unrealized Losses	(13)	(28)
Corporate debt securities
Schedule of Available-for-sale Securities [Line Items]
Less Than 12 Months, Fair Value	30,297	35,095
Less Than 12 Months, Unrealized Losses	(88)	(140)
12 Months or Greater, Fair Value	3,000	0
12 Months or Greater, Unrealized Losses	(7)	0
Total, Fair Value	33,297	35,095
Total, Unrealized Losses	(95)	(140)
Foreign government bonds
Schedule of Available-for-sale Securities [Line Items]
Less Than 12 Months, Fair Value		650
Less Than 12 Months, Unrealized Losses		(1)
12 Months or Greater, Fair Value		0
12 Months or Greater, Unrealized Losses		0
Total, Fair Value		650
Total, Unrealized Losses		(1)
Mortgage-backed securities
Schedule of Available-for-sale Securities [Line Items]
Less Than 12 Months, Fair Value	1,914	3,204
Less Than 12 Months, Unrealized Losses	(6)	(22)
12 Months or Greater, Fair Value	131	0
12 Months or Greater, Unrealized Losses	0	0
Total, Fair Value	2,045	3,204
Total, Unrealized Losses	(6)	(22)
U.S. government agency securities
Schedule of Available-for-sale Securities [Line Items]
Less Than 12 Months, Fair Value	7,817	11,306
Less Than 12 Months, Unrealized Losses	(22)	(65)
12 Months or Greater, Fair Value	4,008	731
12 Months or Greater, Unrealized Losses	(16)	(12)
Total, Fair Value	11,825	12,037
Total, Unrealized Losses	(38)	(77)
U.S. government notes
Schedule of Available-for-sale Securities [Line Items]
Less Than 12 Months, Fair Value	4,493	7,265
Less Than 12 Months, Unrealized Losses	(9)	(29)
12 Months or Greater, Fair Value	398	0
12 Months or Greater, Unrealized Losses	(3)	0
Total, Fair Value	4,891	7,265
Total, Unrealized Losses	$ (12)	$ (29)

Balance Sheet Information - S27

Balance Sheet Information - Summary of Estimated Fair Value of Investments in Marketable Debt Securities (Detail) $ in Thousands	Aug. 31, 2017USD ($)
Balance Sheet Information [Abstract]
Due in 1 year	$ 21,434
Due in 1 year through 5 years	52,893
Due in 5 years through 10 years	3,020
Due after 10 years	3,644
Total	$ 80,991

Balance Sheet Information - S28

Balance Sheet Information - Summary of Assets or Liabilities Measured at Fair Value (Detail) - USD ($) $ in Thousands	Aug. 31, 2017	Feb. 28, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities, debt	$ 80,991
Fair value measurements recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration (current)		$ 902
Fair value measurements recurring | Money market funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	16,003	16,468
Fair value measurements recurring | Asset-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities, debt	9,468	9,575
Fair value measurements recurring | Corporate debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities, debt	43,696	41,693
Fair value measurements recurring | Foreign government bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities, debt	651	649
Fair value measurements recurring | Mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities, debt	3,399	3,302
Fair value measurements recurring | U.S. government agency securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities, debt	13,647	12,631
Fair value measurements recurring | U.S. government notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities, debt	10,130	12,065
Fair value measurements recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration (current)		0
Fair value measurements recurring | Level 1 | Money market funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	16,003	16,468
Fair value measurements recurring | Level 1 | Asset-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities, debt	0	0
Fair value measurements recurring | Level 1 | Corporate debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities, debt	0	0
Fair value measurements recurring | Level 1 | Foreign government bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities, debt	0	0
Fair value measurements recurring | Level 1 | Mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities, debt	0	0
Fair value measurements recurring | Level 1 | U.S. government agency securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities, debt	0	0
Fair value measurements recurring | Level 1 | U.S. government notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities, debt	0	0
Fair value measurements recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration (current)		0
Fair value measurements recurring | Level 2 | Money market funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	0	0
Fair value measurements recurring | Level 2 | Asset-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities, debt	9,468	9,575
Fair value measurements recurring | Level 2 | Corporate debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities, debt	43,696	41,693
Fair value measurements recurring | Level 2 | Foreign government bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities, debt	651	649
Fair value measurements recurring | Level 2 | Mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities, debt	3,399	3,302
Fair value measurements recurring | Level 2 | U.S. government agency securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities, debt	13,647	12,631
Fair value measurements recurring | Level 2 | U.S. government notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities, debt	10,130	12,065
Fair value measurements recurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration (current)		902
Fair value measurements recurring | Level 3 | Money market funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	0	0
Fair value measurements recurring | Level 3 | Asset-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities, debt	0	0
Fair value measurements recurring | Level 3 | Corporate debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities, debt	0	0
Fair value measurements recurring | Level 3 | Foreign government bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities, debt	0	0
Fair value measurements recurring | Level 3 | Mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities, debt	0	0
Fair value measurements recurring | Level 3 | U.S. government agency securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities, debt	0	0
Fair value measurements recurring | Level 3 | U.S. government notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities, debt	$ 0	$ 0

Balance Sheet Information - Cha

Balance Sheet Information - Change In Fair Value of Contingent Consideration (Details) - Fair value measurements recurring - Level 3 $ in Thousands	6 Months Ended
	Aug. 31, 2017USD ($)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance as of February 28, 2017	$ 902
Total remeasurement recognized in earnings	(160)
Settlements	(742)
Balance as of August 31, 2017	$ 0

Balance Sheet Information - Inv

Balance Sheet Information - Inventories, Net (Detail) - USD ($) $ in Thousands	Aug. 31, 2017	Feb. 28, 2017
Balance Sheet Information [Abstract]
Raw materials	$ 3,787	$ 3,479
Finished goods	3,275	2,878
Reserves	(542)	(510)
Total inventories, net	$ 6,520	$ 5,847

Balance Sheet Information - Def

Balance Sheet Information - Deferred Costs (Detail) - USD ($) $ in Thousands	Aug. 31, 2017	Feb. 28, 2017
Deferred Cost [Line Items]
Total deferred costs	$ 64,452	$ 59,883
Appliance
Deferred Cost [Line Items]
Total deferred costs	40,561	39,474
Commissions
Deferred Cost [Line Items]
Total deferred costs	$ 23,891	$ 20,409

Balance Sheet Information - Pro

Balance Sheet Information - Property and Equipment, Net (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Aug. 31, 2017	Aug. 31, 2016	Aug. 31, 2017	Aug. 31, 2016	Feb. 28, 2017
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 65,612		$ 65,612		$ 58,424
Accumulated depreciation and amortization	(33,569)		(33,569)		(28,445)
Property and equipment, net	32,043		32,043		29,979
Depreciation, amortization and impairment expense			8,545	$ 8,467
Property and equipment
Property, Plant and Equipment [Line Items]
Depreciation, amortization and impairment expense	2,600	$ 2,300	5,100	$ 4,700
Land
Property, Plant and Equipment [Line Items]
Property and equipment, gross	9,849		9,849		9,849
Building
Property, Plant and Equipment [Line Items]
Property and equipment, gross	6,549		6,549		6,549
Computer hardware and software
Property, Plant and Equipment [Line Items]
Property and equipment, gross	39,923		39,923		32,850
Vehicles, machinery and equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	4,799		4,799		4,797
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 4,492		$ 4,492		$ 4,379

Balance Sheet Information - Com

Balance Sheet Information - Components of Accumulated Other Comprehensive Income (Loss), Net of Tax (Detail) $ in Thousands	6 Months Ended
	Aug. 31, 2017USD ($)
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax
Beginning balance	$ 6,423
Other comprehensive income before reclassifications	2,140
Amounts reclassified from AOCI	10
Other comprehensive income	2,150
Ending balance	21,829
Foreign Currency Translation Adjustments
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax
Beginning balance	(4,954)
Other comprehensive income before reclassifications	1,991
Amounts reclassified from AOCI	0
Other comprehensive income	1,991
Ending balance	(2,963)
Unrealized Gains (Losses) on Available-for- Sale Investments
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax
Beginning balance	(272)
Other comprehensive income before reclassifications	149
Amounts reclassified from AOCI	10
Other comprehensive income	159
Ending balance	(113)
AOCI Attributable to Parent
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax
Beginning balance	(5,226)
Ending balance	$ (3,076)

Goodwill and Intangible Asset34

Goodwill and Intangible Assets - Schedule of Changes in Carrying Amount of Goodwill (Detail) $ in Thousands	6 Months Ended
	Aug. 31, 2017USD ($)
Goodwill [Roll Forward]
Balance at beginning of period	$ 69,795
Effect of foreign exchange rates	858
Balance at end of period	$ 70,653

Goodwill and Intangible Asset35

Goodwill and Intangible Assets - Schedule of Intangible Assets Subject to Amortization (Detail) - USD ($) $ in Thousands	Aug. 31, 2017	Feb. 28, 2017
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 74,140	$ 73,560
Accumulated Amortization	(45,643)	(41,609)
Net Carrying Value	28,497	31,951
Acquired developed technology
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	50,296	50,013
Accumulated Amortization	(32,626)	(30,105)
Net Carrying Value	17,670	19,908
Customer relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	20,033	19,736
Accumulated Amortization	(10,594)	(9,348)
Net Carrying Value	9,439	10,388
Patents
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	2,999	2,999
Accumulated Amortization	(1,991)	(1,781)
Net Carrying Value	1,008	1,218
Trade name
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	812	812
Accumulated Amortization	(432)	(375)
Net Carrying Value	$ 380	$ 437

Goodwill and Intangible Asset36

Goodwill and Intangible Assets - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Aug. 31, 2017	Aug. 31, 2016	Aug. 31, 2017	Aug. 31, 2016	Feb. 28, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
Other intangible assets not subject to amortization	$ 0.2		$ 0.2		$ 0.2
Amortization expense	1.8	$ 1.8	3.5	$ 3.7
Amortization expense for the remainder of fiscal year 2018	3.4		3.4
Amortization expense for fiscal year 2019	6		6
Amortization expense for fiscal year 2020	5.8		5.8
Amortization expense for fiscal year 2021	5.3		5.3
Amortization expense for fiscal year 2022	4.9		4.9
Amortization expense thereafter	$ 3.1		$ 3.1

Stockholders' Equity - Schedule

Stockholders' Equity - Schedule of Total Stock-Based Compensation Expense (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Aug. 31, 2017	Aug. 31, 2016	Aug. 31, 2017	Aug. 31, 2016
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	$ 9,628	$ 7,896	$ 17,011	$ 15,833
Cost of revenue
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	496	338	922	636
Research and development
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	3,121	2,608	5,808	5,072
Sales and marketing
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	3,400	1,943	5,534	3,791
General and administrative
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	$ 2,611	$ 3,007	$ 4,747	$ 6,334

Stockholders' Equity - Addition

Stockholders' Equity - Additional Information (Detail) - USD ($)	6 Months Ended
	Aug. 31, 2017	Dec. 31, 2015
2015 Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee stock purchase plan, offering period	6 months
Employee stock purchase plan, percentage	85.00%
Number of common stock shares reserved for issuance	634,746
Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost related to outstanding stock options	$ 6,100,000
Expected period for recognizing compensation expense	1 year 6 months 15 days
Restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected period for recognizing compensation expense	2 years 9 months 13 days
Unrecognized compensation cost related to unvested RSUs	$ 63,100,000
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock repurchase program, aggregate purchase price		$ 50,000,000
Maximum | 2015 Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of common stock shares reserved for issuance	750,000

Stockholders' Equity - Summary

Stockholders' Equity - Summary of Common Stock Repurchases (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Aug. 31, 2017	Aug. 31, 2016	Aug. 31, 2017	Aug. 31, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Total number of shares repurchased (in shares)	0	464	331	482
Dollar amount of shares repurchased	$ 0	$ 6,961	$ 6,546	$ 7,241
Average price paid per share (in usd per share)	$ 0	$ 14.99	$ 19.75	$ 15.03
Remaining amount authorized as of the period end	$ 16,642	$ 23,543	$ 16,642	$ 23,543

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Aug. 31, 2017	Aug. 31, 2016	Aug. 31, 2017	Aug. 31, 2016
Income Tax Disclosure [Abstract]
Provision for income taxes	$ (358)	$ (5,209)	$ (2,881)	$ (8,519)

Borrowings (Details)

Borrowings (Details)	Aug. 31, 2017USD ($)
Line of Credit Facility [Line Items]
Credit facility maximum borrowing capacity	$ 25,000,000
Second Amendment
Line of Credit Facility [Line Items]
Credit facility maximum borrowing capacity	50,000,000
Amount drawn under credit facility	$ 0

Segment Information - Additiona

Segment Information - Additional Information (Detail)	6 Months Ended
	Aug. 31, 2017Segment
Segment Reporting [Abstract]
Number of reporting segment	1

Segment Information - Schedule

Segment Information - Schedule of Revenue by Geographic Region (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Aug. 31, 2017	Aug. 31, 2016	Aug. 31, 2017	Aug. 31, 2016
Segment Reporting Information [Line Items]
Revenue	$ 94,325	$ 87,930	$ 188,504	$ 174,584
North America
Segment Reporting Information [Line Items]
Revenue	70,384	65,855	140,571	130,952
United States
Segment Reporting Information [Line Items]
Revenue	66,595	62,413	132,857	124,006
Other
Segment Reporting Information [Line Items]
Revenue	3,789	3,442	7,714	6,946
Latin America
Segment Reporting Information [Line Items]
Revenue	1,324	1,225	2,641	2,350
Asia-Pacific
Segment Reporting Information [Line Items]
Revenue	6,010	5,235	11,932	10,284
EMEA
Segment Reporting Information [Line Items]
Revenue	$ 16,607	$ 15,615	$ 33,360	$ 30,998

Net Income Per Share - Calculat

Net Income Per Share - Calculation of Basic and Diluted Net Income (Loss) Per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Aug. 31, 2017	Aug. 31, 2016	Aug. 31, 2017	Aug. 31, 2016
Earnings Per Share [Abstract]
Net income	$ 1,554	$ 2,437	$ 4,226	$ 5,221
Weighted-average shares used to compute net income (loss) per share, basic (in shares)	53,040	52,265	52,958	52,275
Dilutive shares from stock options and RSUs (in shares)	1,569	1,056	1,512	813
Weighted-average shares used to compute net income (loss) per share, diluted (in shares)	54,609	53,321	54,470	53,088
Net income (loss) per share, basic (in usd per share)	$ 0.03	$ 0.05	$ 0.08	$ 0.10
Net income (loss) per share, diluted (in usd per share)	$ 0.03	$ 0.05	$ 0.08	$ 0.10