Ruckus Wireless (RKUS) 10-K 25 Feb 15 2014 FY Annual report Financial data

Document_and_Entity_Informatio

Document and Entity Information Document (USD $)	12 Months Ended
In Millions, except Share data, unless otherwise specified	Dec. 31, 2014	Feb. 18, 2015	Jun. 30, 2014
Entity [Abstract]
Entity Registrant Name	RUCKUS WIRELESS INC
Entity Central Index Key	1294016
Document Type	10-K
Document Period End Date	31-Dec-14
Amendment Flag	FALSE
Document Fiscal Year Focus	2014
Document Fiscal Period Focus	FY
Current Fiscal Year End Date	-19
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		85,282,116
Entity Public Float			$916
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes

Consolidated_Balance_Sheets

Consolidated Balance Sheets (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Current assets:
Cash and cash equivalents	$56,083	$91,282
Short-term investments	142,706	60,878
Accounts receivable, net of allowance for doubtful accounts of $800 and $400 as of December 31, 2014 and 2013, respectively	59,553	44,638
Inventories	21,064	16,748
Deferred costs	4,414	4,207
Deferred tax assets	6,205	7,715
Prepaid expenses and other current assets	5,367	5,227
Total current assets	295,392	230,695
Property and equipment, net	13,636	11,472
Goodwill	9,945	9,945
Intangible assets, net	7,351	9,671
Non-current deferred tax asset	21,166	15,317
Restricted cash	5,000	5,000
Other assets	1,504	1,122
Total assets	353,994	283,222
Current liabilities:
Accounts payable	23,538	19,131
Accrued compensation	13,765	11,759
Accrued liabilities	5,282	6,231
Deferred revenue	39,231	33,139
Total current liabilities	81,816	70,260
Non-current deferred revenue	10,554	7,098
Non-current deferred tax liabilities	596	854
Other non-current liabilities	1,379	1,161
Total liabilities	94,345	79,373
Commitments and contingencies (Note 8)
Stockholders’ equity:
Common stock, $0.001 par value; 250,000 shares authorized as of December 31, 2014 and 2013; 85,110 and 80,691 shares issued and outstanding at December 31, 2014 and 2013, respectively	85	81
Additional paid-in capital	273,276	225,575
Accumulated other comprehensive loss	-97	-2
Accumulated deficit	-13,615	-21,805
Total stockholders’ equity	259,649	203,849
Total liabilities and stockholders’ equity	$353,994	$283,222

Consolidated_Balance_Sheets_Pa

Consolidated Balance Sheets (Parenthetical) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, except Share data, unless otherwise specified
Statement of Financial Position [Abstract]
Allowance for doubtful accounts	$800	$400
Common stock, par value (in dollars per share)	$0.00	$0.00
Common stock, shares authorized	250,000,000	250,000,000
Common Stock, Shares, Issued	85,110,000	80,691,000
Common stock, shares outstanding	85,110,000	80,691,000

Consolidated_Statements_of_Ope

Consolidated Statements of Operations (USD $)	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Revenue:
Product	$303,446	$245,935	$201,913
Service	23,473	17,132	12,740
Total revenue	326,919	263,067	214,653
Cost of revenue:
Product	90,651	78,344	70,478
Service	12,454	9,844	5,306
Total cost of revenue	103,105	88,188	75,784
Gross profit	223,814	174,879	138,869
Operating expenses:
Research and development	77,164	61,783	43,821
Sales and marketing	98,634	79,185	56,209
General and administrative	33,622	33,752	20,237
Total operating expenses	209,420	174,720	120,267
Operating income (loss)	14,394	159	18,602
Interest income (expense)	199	187	-472
Other expense, net	-463	-456	-3,664
Income (loss) before income taxes	14,130	-110	14,466
Income tax expense (benefit)	5,940	-1,899	-17,238
Net income	8,190	1,789	31,704
Net Income (Loss) Available to Common Stockholders, Basic and Diluted	$8,190	$1,789	$9,036
Net income per share attributable to common stockholders:
Basic (USD per share)	$0.10	$0.02	$0.36
Diluted (USD per share)	$0.09	$0.02	$0.24
Weighted average number of shares outstanding, basic (in shares)	82,908	76,744	24,847
Weighted average number of shares outstanding, diluted (in shares)	93,668	93,361	37,775

Consolidated_Statements_of_Com

Consolidated Statements of Comprehensive Income (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Statement of Comprehensive Income [Abstract]
Net income	$8,190	$1,789	$31,704
Other comprehensive loss, net of tax:
Unrealized loss on short-term investments	-95	-2	0
Comprehensive income	$8,095	$1,787	$31,704

Consolidated_Statements_of_Red

Consolidated Statements of Redeemable Convertible Preferred Stock and Stockholders' Equity (Deficit) (USD $)	12 Months Ended
In Thousands, except Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stockholders' Equity Attributable to Parent	$259,649	$203,849	$170,211	($44,743)
Adjustment to Additional Paid in Capital, Income Tax Effect from Share-based Compensation, Net	26,594	18,701	8,451
Stock Issued During Period, Value, Stock Options Exercised	7,632	7,236	630
Stock Issued During Period, Value, Employee Stock Purchase Plan	4,296	3,860
Vesting of early exercised stock options	0	35	113
Stock Repurchased During Period, Value		0	0
Issuance of Series G redeemable convertible preferred stock, net of issuance cost			0
Preferred Stock, Shares Issued From Exercise Of Stock Warrants, Value			0
Stock Issued During Period, Value, New Issues			93,999
Stock Issued During Period, Value, Conversion of Convertible Securities			77,729
Issuance of preferred stock upon exercise of warrant, Value			2,303
Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation	9,183	2,019	25
Other Comprehensive Income (Loss), Net of Tax	-95	-2
Net Income (Loss) Attributable to Parent	8,190	1,789	31,704
Preferred Stock [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares, Outstanding	0	0	0	43,285,000
Stockholders' Equity Attributable to Parent	0	0	0	51,257
Issuance Of Redeemable Convertible Preferred Stock, Net Of Issuance Cost, Shares			4,590,000
Issuance of Series G redeemable convertible preferred stock, net of issuance cost			24,883
Stock Issued During Period, Shares, Conversion of Convertible Securities			-47,981,000
Stock Issued During Period, Value, Conversion of Convertible Securities			-77,729
Preferred Stock [Member] | Warrant [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Preferred Stock, Shares Issued From Exercise Of Stock Warrants			106,000
Preferred Stock, Shares Issued From Exercise Of Stock Warrants, Value			1,589
Common Stock [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Shares, Outstanding	85,110,000	80,691,000	74,166,000	18,273,000
Stockholders' Equity Attributable to Parent	85	81	74	18
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period	3,618,000	5,903,000	812,000
Stock Issued During Period, Value, Stock Options Exercised	4	6	1
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period	319,000
Stock Issued During Period, Shares, Employee Stock Purchase Plans	482,000	345,000
Stock Issued During Period, Value, Employee Stock Purchase Plan		1
Stock Repurchased During Period, Shares		-1,000	-2,000
Stock Issued During Period, Shares, New Issues			7,000,000
Stock Issued During Period, Value, New Issues			7
Stock Issued During Period, Shares, Conversion of Convertible Securities			47,981,000
Stock Issued During Period, Value, Conversion of Convertible Securities			48
Common Stock [Member] | Warrant [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common Stock, Shares Issued From Exercise Of Stock Warrants		278,000	102,000
Additional Paid-in Capital [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stockholders' Equity Attributable to Parent	273,276	225,575	193,731	10,537
Adjustment to Additional Paid in Capital, Income Tax Effect from Share-based Compensation, Net	26,594	18,701	8,451
Stock Issued During Period, Value, Stock Options Exercised	7,628	7,230	629
Stock Issued During Period, Value, Employee Stock Purchase Plan	4,296	3,859
Vesting of early exercised stock options		35	113
Stock Issued During Period, Value, New Issues			93,992
Stock Issued During Period, Value, Conversion of Convertible Securities			77,681
Issuance of preferred stock upon exercise of warrant, Value			2,303
Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation	9,183	2,019	25
Accumulated Other Comprehensive Income (Loss) [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stockholders' Equity Attributable to Parent	-97	-2	0	0
Other Comprehensive Income (Loss), Net of Tax	-95	-2
Retained Earnings [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stockholders' Equity Attributable to Parent	-13,615	-21,805	-23,594	-55,298
Net Income (Loss) Attributable to Parent	$8,190	$1,789	$31,704

Consolidated_Statements_of_Cas

Consolidated Statements of Cash Flows (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Cash flows from operating activities
Net income	$8,190	$1,789	$31,704
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation and amortization	9,616	6,591	4,850
Provision for doubtful accounts	400	911	179
Stock-based compensation	26,594	18,701	8,451
Amortization of investment premiums, net of accretion of purchase discounts	1,278	1,071	0
Deferred income taxes	4,644	-2,909	-18,281
Excess tax benefit from employee stock incentive plans	-9,183	-2,019	-25
Loss on disposal of property and equipment	0	175	35
Change in fair value of preferred stock warrants	0	0	2,842
Revaluation of contingent liability	0	0	400
Accretion of debt discount	0	0	93
Changes in operating assets and liabilities:
Accounts receivable	-15,315	-4,253	-21,073
Inventories	-4,316	2,293	-8,116
Deferred costs	-207	981	-3,699
Prepaid expenses and other current assets	62	-2,459	-1,313
Other assets	-286	134	-228
Accounts payable	4,426	2,792	4,031
Accrued compensation	2,006	2,304	4,573
Accrued liabilities	-731	2,715	364
Deferred revenue	9,548	-249	23,305
Net cash provided by operating activities	36,726	28,568	28,092
Cash flows from investing activities
Purchase of investments	-174,710	-83,442	0
Proceeds from the maturity of investments	88,237	8,324	0
Proceeds from the sale of investments	3,012	13,128	0
Purchase of property and equipment	-9,479	-7,776	-7,531
Increase in facility lease deposits	-96	-300	-591
Cash used in acquisition	0	-7,882	-2,000
Increase in restricted cash	0	-5,000	0
Net cash used in investing activities	-93,036	-82,948	-10,122
Cash flows from financing activities:
Proceeds from exercise of stock options	7,632	7,236	630
Proceeds from employee stock purchase plan	4,296	3,860	0
Excess tax benefit from employee stock incentive plans	9,183	2,019	25
Initial public offering costs	0	-839	-2,812
Proceeds from initial public offering	0	0	97,650
Proceeds from exercise of unvested stock options, net of repurchases	0	0	2
Payments on credit facilities	0	0	-5,000
Payments on loans payable	0	0	-8,562
Proceeds from issuance of redeemable convertible preferred stock	0	0	25,000
Issuance costs for redeemable convertible preferred stock	0	0	-117
Settlement of contingent consideration	0	0	-2,600
Net cash provided by financing activities	21,111	12,276	104,216
Net increase (decrease) in cash and cash equivalents	-35,199	-42,104	122,186
Cash and cash equivalents at beginning of year	91,282	133,386	11,200
Cash and cash equivalents at end of year	56,083	91,282	133,386
Supplemental disclosure of cash flow information
Income taxes paid	740	915	934
Interest paid	0	0	761
Noncash investing and financing activities
Purchases of property and equipment recorded in accounts payable & accrued liabilities	1,091	1,111	928
Vesting of early exercised stock options	0	35	113
Conversion of preferred stock into common stock	0	0	77,729
Cashless exercise of preferred stock warrant	0	0	1,589
Unpaid offering costs in additional paid-in capital	$0	$0	$839

DESCRIPTION_OF_BUSINESS_AND_SU

DESCRIPTION OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	12 Months Ended
	Dec. 31, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract]
DESCRIPTION OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	DESCRIPTION OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
	Description of Business— Ruckus Wireless, Inc. (“Ruckus”) is a global supplier of advanced, carrier-class Wi-Fi solutions. Ruckus’ solutions, which are called Smart Wi-Fi, are used by service providers and enterprises to solve a range of network capacity, coverage and reliability challenges associated with increasing wireless traffic demands created by the growth in the number of users equipped with more powerful smart wireless devices using increasingly data rich applications and services. Ruckus markets and sells its products and technology directly and indirectly through a vast network of channel partners to a variety of service providers and enterprises around the world. Its Smart Wi-Fi solutions offer carrier-class features and functionality such as enhanced reliability, consistent performance, extended range and massive scalability. Ruckus’ products include high capacity, high-speed hardware gateways, controllers, wireless bridges and indoor and outdoor access points, software platforms providing gateway, controller and reporting, analytics and management solutions, and unique Wi-Fi-related cloud services such as location-based positioning (“LBS”) and public access. These hardware and software products and cloud services incorporate various elements of Ruckus’ proprietary technologies, including Smart Radio, SmartCast, SmartMesh, SmartCell and Smart Scaling, to enable high performance in a variety of challenging operating environments.
	Principles of Consolidation—The consolidated financial statements include the accounts of Ruckus and its wholly owned subsidiaries (collectively, the “Company”). All intercompany balances and transactions have been eliminated in consolidation.
	Use of Estimates—The preparation of financial statements in conformity with generally accepted accounting principles (“GAAP”) in the United States of America requires management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. Significant estimates and assumptions made by management include the determination of revenue recognition, inventory, goodwill and intangible asset valuation, accounting for income taxes, stock-based compensation and warranty liability. Management bases its estimates on historical experience and also on assumptions that it believes are reasonable. Actual results could materially differ from those estimates.
	Concentrations of Credit Risk and Significant Customers—Financial instruments that subject the Company to significant concentrations of credit risk primarily consist of cash, cash equivalents, short-term investments and accounts receivable. The Company invests only in high credit quality instruments and maintains its cash equivalents and short-term investments in fixed income securities. Management believes that the financial institutions that hold the Company’s investments are financially sound and, accordingly, are subject to minimal credit risk. Deposits held with banks may exceed the amount of insurance provided on such deposits. The Company’s accounts receivable are primarily derived from distributors and service providers located in the Americas, Europe, and Asia Pacific. The Company generally does not require its customers to provide collateral to support accounts receivable. To reduce credit risk, management performs ongoing credit evaluations of its customers’ financial condition. The Company has recorded an allowance for doubtful accounts for those receivables management has determined to not be collectible.
	The percentages of revenue from individual customers totaling greater than 10% of total consolidated Company revenue were as follows:
		Years Ended December 31,
		2014		2013			2012
	Distributor A	14.8	%	15.2	%		16.3	%
	Distributor B	12.5	%	12.4	%		*
	Distributor C	10.9	%	*			*
	Distributor D	*		*			12.5	%
	*    Less than 10%
	Each of the Company’s greater than 10% customers are third-party distributors, and in 2013 and 2014, no single value added reseller or end customer accounted for more than 10% of the Company's total consolidated revenue.
	The percentage of receivables from individual customers totaling greater than 10% of total consolidated Company accounts receivable were as follows:
		December 31,
		2014		2013
	Distributor C	12.5	%	10.4	%
	Distributor A	*		11.6	%
	Distributor E	*		11.2	%
	*    Less than 10%
	Cash and Cash Equivalents—The Company considers all highly liquid financial instruments with original maturities of 90 days or less to be cash equivalents. Cash and cash equivalents are stated at cost, which approximates fair value. The Company’s cash equivalents included interest-bearing bank accounts, money market funds and corporate debt securities.
	Restricted Cash—As of December 31, 2014, the Company held $5.0 million in escrow to secure an indemnification agreement. If triggered, the Company will indemnify a channel partner for reimbursement of penalties assessed under the Information Technology Act of India (“IT Act”). Refer to “Reimbursement of Penalties” in Note 8.
	Fair Value of Financial Instruments—The Company defines fair value as the price that would be received from selling an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. When determining the fair value measurements for assets and liabilities which are required to be recorded at fair value, the Company considers the principal or most advantageous market in which to transact and the market-based risk. The Company applies fair value accounting for all financial assets and liabilities that are recognized or disclosed at fair value in the financial statements on a recurring basis. The carrying amounts reported in the consolidated financial statements approximate the fair value for cash and cash equivalents, accounts receivable, accounts payable, and accrued liabilities, due to their short-term nature.
	Short-Term Investments—The Company’s short-term investments consist primarily of corporate debt securities and U.S government agency securities. The Company classifies investments as available-for-sale at the time of purchase. As Ruckus views these securities as available to support current operations, the Company classify securities with maturities beyond 12 months as current assets. Ruckus’ policy is to protect the value of its investment portfolio and minimize principal risk by earning returns based on current interest rates.
	Available-for-sale investments are initially recorded at cost and periodically adjusted to fair value in the consolidated balance sheets. Unrealized gains and losses on these investments are reported as a separate component of accumulated other comprehensive income (loss). Realized gains and losses are reported in the consolidated statements of operations. A specific identification method is used to determine the cost basis of the short-term investments sold. The effects of reclassifications from accumulated other comprehensive loss to the income statement were insignificant for all periods presented. The investments are adjusted for the amortization of premiums and discounts until maturity and such amortization is included in interest income (expense).
	Investments are considered impaired when a decline in fair value is judged to be other-than-temporary. The Company consults with its investment managers and considers available quantitative and qualitative evidence in evaluating potential impairment of the investments on a quarterly basis. If the cost of an individual investment exceeds its fair value, the Company evaluates, among other factors, general market conditions, the duration and extent to which the fair value is less than cost, and the Company’s intent and ability to hold the investment. Once a decline in fair value is determined to be other-than-temporary, the Company will record an impairment charge and establish a new cost basis in the investment. During the year ended December 31, 2014 and 2013, the Company did not consider any of its investments to be other-than-temporarily impaired.
	Allowance for Doubtful Accounts—The Company records an allowance for doubtful accounts based on historical experience and a detailed assessment of the collectability of its accounts receivable. In estimating the allowance for doubtful accounts, management considers, among other factors, the aging of the accounts receivable, historical write-offs, and the credit-worthiness of each customer. If circumstances change, such as higher-than-expected defaults or an unexpected material adverse change in a major customer’s ability to meet its financial obligations, the Company’s estimate of the recoverability of the amounts due could be reduced by a material amount.
	Activity in the allowance for doubtful accounts was as follows (in thousands):
		Years Ended December 31,
		2014			2013				2012
	Balance at beginning of year	$	400		$	140			$	117
	Charged to expenses	400			911				179
	Write-offs	—			(651		)		(156		)
	Balance at end of year	$	800		$	400			$	140
	Inventories—Inventories are carried at the lower of cost or market, on a first-in, first-out basis. The Company evaluates inventory for excess and obsolete products, based on management’s assessment of future demand, market conditions and technical obsolescence. The Company subcontracts manufacturing of substantially all of its products. At December 31, 2014 and 2013, inventories were predominately comprised of finished goods.
	Deferred Costs—When the Company’s products have been delivered, but the product revenue associated with the arrangement has been deferred as a result of not meeting the revenue recognition criteria (see “Revenue Recognition” below), the related product costs are also deferred if the inventory is deemed recoverable. The deferred costs are recognized in cost of revenues when the related deferred revenue is recognized or when the inventory is deemed unrecoverable.
	Property and Equipment—Property and equipment are stated at cost, less accumulated depreciation and amortization. Depreciation is calculated using the straight-line method over the estimated useful lives of the respective assets. Leasehold improvements are amortized using the straight-line method over the shorter of the estimated useful lives of the leasehold improvements or the term of the related lease.
	Goodwill— Goodwill represents the excess of the purchase price of an acquired business over the fair value of the underlying net tangible and intangible assets. The Company evaluates goodwill for impairment annually in the fourth quarter or whenever events or changes in circumstances indicate the carrying value of goodwill may not be recoverable. Triggering events that may indicate impairment include, but are not limited to, a significant adverse change in customer demand or business climate that could affect the value of goodwill or a significant decrease in expected cash flows. The Company performs the impairment testing by first assessing qualitative factors to determine whether the existence of events or circumstances leads to a determination that it is more likely than not that the fair value of its reporting unit is less than its carrying amount. If, after assessing the totality of events or circumstances, the Company determines it is more likely than not that the fair value of a reporting unit is less than its carrying amount, the Company performs a two-step impairment test. The first step requires the identification of the reporting units and comparison of the fair value of a reporting unit with its carrying amount, including goodwill. If the fair value of the reporting unit is less than its carrying value, an indication of goodwill impairment exists for the reporting unit and the second step of the impairment test is performed to compute the amount of the impairment. Under the second step, an impairment loss is recognized for any excess of the carrying amount of the reporting unit's goodwill over the implied fair value of that goodwill. We have determined that we have only one reporting unit. For the years ended December 31, 2014, 2013 and 2012, no impairment has been recognized related to the goodwill balance.
	Intangible Assets— Intangible assets consist of purchased technology resulting from acquisitions. The purchased technology intangible assets are recorded at fair value and are amortized on a straight-line basis over their estimated useful lives, which ranges from three to four years.
	Impairment of Long-Lived Assets—Long-lived assets, including intangible assets, are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of such assets may not be recoverable. Triggering events that may indicate impairment include, but are not limited to, significant under performance relative to estimated results, significant changes in the manner of our use of the acquired assets or the strategy for our overall business and significant negative industry or economic trends. Determination of recoverability of long-lived assets is based on an estimate of undiscounted future cash flows resulting from the use of the asset and its eventual disposition. If property and equipment or intangible assets are considered to be impaired, the impairment to be recognized equals the amount by which the carrying value of the asset exceeds the assets fair market value. The Company did not record any impairment charges in the periods presented.
	Revenue Recognition—The Company generates revenue from sales of our products and services through a direct sales force and indirect relationships with its channel partners. Revenue is recognized when all of the following criteria are met:
	•	Persuasive evidence of an arrangement exists.  The Company relies upon sales contracts and purchase orders to determine the existence of an arrangement.
	•	Delivery has occurred.  Delivery is deemed to have occurred when title has transferred. The Company uses shipping documents to verify transfer of title.
	•	The fee is fixed or determinable.  The Company assess whether the fee is fixed or determinable based on the terms associated with the transaction.
	•	Collectability is reasonably assured.  The Company assess collectability as sales occur, based on an analysis of the customer's credit and payment history.
	Certain of the Company's arrangements are multiple-element arrangements and may include hardware, post-contract support (“PCS”), stand-alone software and software as a service. All of its products and services qualify as separate units of accounting. For multiple-element arrangements, the Company allocates revenue to each unit of accounting based on an estimated selling price at the inception of the arrangement. The total arrangement consideration is allocated to each separate unit of accounting using the relative estimated selling prices of each unit. The Company limits the amount of revenue recognized for delivered elements to an amount that is not contingent upon future delivery of additional products or services.
	To determine the estimated selling price in multiple-element arrangements, the Company first looks to establish vendor specific objective evidence (“VSOE”), of the selling price using the prices charged for a deliverable when sold separately. If VSOE of the selling price cannot be established for a deliverable, the Company looks to establish third-party evidence (“TPE”), of the selling price by evaluating the pricing of similar and interchangeable competitor products or services in standalone arrangements. However, as our products contain a significant element of proprietary technology and offer substantially different features and functionality from our competitors, we have been unable to obtain comparable pricing information with respect to our competitors’ products. Therefore, we have not been able to obtain reliable evidence of TPE of the selling price. If neither VSOE nor TPE of the selling price can be established for a deliverable, we establish best estimate selling price (“BESP”), by reviewing historical transaction information and considering several other internal factors including discounting and margin objectives.
	The Company regularly reviews estimated selling price of the product offerings and maintain internal controls over the establishment and updates of these estimates. The Company currently does not expect a material impact in the near term from changes in estimated selling prices, including VSOE of selling price.
	Product Revenue. The Company's product revenue consists of revenue from sales of its hardware and perpetual software licenses and is net of allowances for estimated sales returns, product rebates, stock rotations, and other programs based on historical experience.
	The Company's hardware deliverables typically include proprietary operating system software, which together deliver the essential functionality of its products. Therefore, the Company's hardware appliances are considered non-software elements and are not subject to the industry-specific software revenue recognition guidance. The Company generates revenue through a direct sales force and indirect relationships with its channel partners. For sales to direct end-users and certain channel partners, the Company recognizes product revenue at the time of the title transfer, assuming all other revenue recognition criteria are met. Certain of the Company's distributors that stock its products are granted stock rotation rights as well as rebates for sales of the Company's products. Therefore, the arrangement fee for this group of distributors is not fixed and determinable when products are shipped to these distributors and revenue is deferred until the Company's products are shipped to the distributors’ customer.
	The Company's product revenue also includes revenue from the sale of stand-alone software products. Sales of stand-alone software generally include a perpetual license to our software. Stand-alone software products may operate in conjunction with the Company's hardware products but are not considered essential to the functionality of the hardware.
	For sales of stand-alone software, the Company recognizes revenue based on software revenue recognition guidance. Under the software revenue recognition guidance, the Company uses the residual method to recognize revenue when a product agreement includes one or more elements to be delivered at a future date and VSOE of the fair value of all undelivered elements exists. In the majority of the Company's contracts, the only element that remains undelivered at the time of delivery of the product is PCS. Under the residual method, the fair value of the undelivered elements is deferred and the remaining portion of the contract fee is recognized as product revenue. If evidence of the fair value of one or more undelivered elements does not exist, all revenue is generally deferred and recognized when delivery of those elements occurs or when fair value can be established. When the only undelivered element for which the Company does not have VSOE of selling price is PCS, revenue for the entire arrangement is bundled and recognized ratably over the support period.
	Service Revenue. The Company's service revenue consists of revenue from PCS and software as a service. PCS includes software updates on an “if and when available” basis, expedited replacement for defective access points, controllers or gateways, telephone and internet access to technical support personnel and hardware support. PCS and software as a service are typically sold in one, three or five year terms and the Company recognizes the revenue ratably over the contractual service period.
	Sales Tax and Shipping. Revenue is reported net of sales taxes. Shipping charges billed to channel partners are included in revenue and related costs are included in cost of revenue. To date, shipping charges have not been significant.
	Stock-Based Compensation—The Company measures compensation expense for all stock-based payment awards granted to employees, including stock options, restricted stock units (“RSUs”) and purchases under the Company's Employee Stock Purchase Plan (“ESPP”), based on the estimated fair value on the date of the grant. The fair value of each stock option granted is estimated using the Black-Scholes option pricing model. The fair value of each RSU granted represents the closing price of the Company's common stock on the date of grant. The fair value of purchases under the Company’s ESPP is calculated based on the closing price of the Company's common stock on the date of grant and the value of put and call options estimated using the Black-Scholes option pricing model. Stock-based compensation is recognized on a straight-line basis over the requisite service period, net of estimated forfeitures. The forfeiture rate is based on an analysis of the Company’s actual historical forfeitures.
	The Company accounts for stock options issued to nonemployees based on the fair value of the awards determined using the Black-Scholes option pricing model. The fair value of stock options granted to nonemployees is re-measured as the stock options vest, and the resulting change in fair value, if any, is recognized in the Company’s consolidated statement of operations during the period the related services are rendered.
	Foreign Currency—The functional currency of the Company’s foreign subsidiaries is the U.S. dollar. Monetary assets and liabilities at the foreign subsidiary are re-measured using the current exchange rate at the balance sheet date. Non-monetary assets and liabilities and capital accounts are presented using historical exchange rates. Revenues and expenses are presented using the average exchange rates in effect during the period. Foreign currency re-measurement gains and losses and foreign currency transaction gains and losses have not been material for any periods presented.
	Income Taxes—The Company utilizes the asset and liability method of accounting for income taxes. Under this method, deferred tax assets and liabilities are determined based on differences between financial reporting and tax reporting bases of assets and liabilities, and are measured using enacted tax rates and laws that are expected to be in effect when the differences are expected to reverse. The Company records a valuation allowance when necessary to reduce its deferred tax assets to the amount that is more likely than not to be realized. In order for the Company to realize its deferred tax assets, the Company must be able to generate sufficient taxable income in those jurisdictions where the deferred tax assets are located. In determining the need for a valuation allowance, the Company considers future growth, forecasted earnings, future taxable income, the mix of earnings in the jurisdictions in which it operates, historical earnings, taxable income in prior years, if carryback is permitted under the law, carry-forward periods, and prudent and feasible tax planning strategies. In the event the Company were to determine that not all or part of its net deferred tax assets are not more likely than not to be realized in the future, an adjustment to the deferred tax assets valuation allowance would be charged to earnings in the period in which it makes such a determination, or goodwill would be adjusted if the valuation allowance related to deferred tax assets acquired in a business combination and the adjustment is within the measurement period. If the Company later determines that it is more likely than not that the deferred tax assets would be realized, it would reverse the previously provided valuation allowance as an adjustment to earnings at such time.
	The amount of income tax the Company pays is subject to ongoing audits by federal, state and foreign tax authorities, which often result in proposed assessments. The Company records uncertain tax positions in accordance with accounting standards on the basis of a two-step process whereby (1) a determination is made as to whether it is more likely than not that the tax positions will be sustained based on the technical merits of the position and (2) for those tax positions that meet the more-likely-than-not recognition threshold we recognize the largest amount of tax benefit that is more likely than not to be realized upon ultimate settlement with the related tax authority. The Company recognizes interest and penalties related to uncertain tax positions in its provision for income taxes line in the accompanying consolidated statements of operations.
	Loss Contingencies—The Company is subject to the possibility of various loss contingencies arising in the ordinary course of business. The Company considers the likelihood of loss or impairment of an asset, or the incurrence of a liability, as well as the Company's ability to reasonably estimate the amount of loss, in determining loss contingencies. An estimated loss contingency is accrued when it is probable that an asset has been impaired or a liability has been incurred and the amount of loss can be reasonably estimated. If the Company determines that a loss is possible and the range of the loss can be reasonably determined, then the Company discloses the range of the possible loss. The Company regularly evaluates available current information available to determine whether an accrual is required, an accrual should be adjusted or a range of possible loss should be disclosed.
	Recent Accounting Pronouncements—In May 2014, the Financial Accounting Standard Board (“FASB”) and International Accounting Standards Board (“IASB”) issued accounting standards update (“ASU”) 2014-09, Revenue from Contracts with Customers, a converged standard on revenue recognition. Some of the main areas of transition to the new standard include, among others, transfer of control (revenue is recognized when a customer obtains control of a good or service), allocation of transaction price based on relative standalone selling price (entities that sell multiple goods or services in a single arrangement must allocate the consideration to each of those goods or services), contract costs (entities sometimes incur costs, such as sales commissions or mobilization activities, to obtain or fulfill a contract), and disclosures (extensive disclosures are required to provide greater insight into both revenue that has been recognized, and revenue that is expected to be recognized in the future from existing contracts). This accounting standard will be effective for the Company beginning in its first quarter of 2017, with no early adoption permitted, using one of two methods of adoption: (i) retrospective to each prior reporting period presented, with the option to elect certain practical expedients as defined within the standard; or (ii) retrospective with the cumulative effect of initially applying the standard recognized at the date of initial application inclusive of certain additional disclosures. The Company is currently evaluating the impact of this accounting standard update on its consolidated financial position, results of operations and cash flows.

FAIR_VALUE_DISCLOSURE

FAIR VALUE DISCLOSURE	12 Months Ended
	Dec. 31, 2014
Fair Value Disclosures [Abstract]
FAIR VALUE DISCLOSURE	FAIR VALUE DISCLOSURE
	Assets and liabilities recorded at fair value in the consolidated financial statements are categorized based upon the level of judgment associated with the inputs used to measure their fair value. The Company categorizes its financial instruments into a fair value hierarchy that prioritizes the inputs to valuation techniques used to measure fair value. The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (Level 1 measurements) and the lowest priority to unobservable inputs (Level 3 measurements).
	A financial instrument’s level within the fair value hierarchy is based on the lowest level of any input that is significant to the fair value measurement. There were no transfers between levels during the years ended December 31, 2014 and 2013. Hierarchical levels that are directly related to the amount of subjectivity associated with the inputs to the valuation of these assets or liabilities are as follows:
	Level 1		Quoted prices (unadjusted) in active markets that are accessible at the measurement date for identical assets or liabilities.
	Level 2		Observable prices that are based on inputs not quoted on active markets, but corroborated by market data.
	Level 3		Unobservable inputs are used when little or no market data is available.
	The Company’s assets that were measured at fair value by level within the fair value hierarchy were as follows (in thousands):
		December 31, 2014
		Fair Value		Level 1		Level 2		Level 3
	Assets
	Cash equivalents:
	Money market funds	$	2,771	$	2,771	$	—	$	—
	Corporate debt securities	3,000		—		3,000		—
	Short-term investments:
	Corporate debt securities	118,323		—		118,323		—
	U.S government agency securities	24,383		—		24,383		—
	Total assets measured and recorded at fair value	$	148,477	$	2,771	$	145,706	$	—
		December 31, 2013
		Fair Value		Level 1		Level 2		Level 3
	Assets:
	Cash equivalents:
	Money market funds	$	47,773	$	47,773	$	—	$	—
	Short-term investments:
	Corporate debt securities	60,878		—		60,878		—
	Total assets measured and recorded at fair value	$	108,651	$	47,773	$	60,878	$	—

INVESTMENTS

INVESTMENTS	12 Months Ended
	Dec. 31, 2014
Investments, Debt and Equity Securities [Abstract]
INVESTMENTS	SHORT-TERM INVESTMENTS
	Short-term investments consisted of the following (in thousands):
		December 31, 2014
		Amortized Cost		Unrealized Gains			Unrealized Losses			Fair Value
	Corporate debt securities	$	118,470	$	—		$	(147	)	$	118,323
	U.S. government agency securities	24,392		4			(13		)	24,383
	Total short-term investments	$	142,862	$	4		$	(160	)	$	142,706
		December 31, 2013
		Amortized Cost		Unrealized Gains			Unrealized Losses			Fair Value
	Corporate debt securities	$	60,882	$	9		$	(13	)	$	60,878
	The gross realized gains and gross realized losses related to the Company’s short-term investments were not material for the years ended December 31, 2014 and 2013. The Company did not have short-term investments for the year ended December 31, 2012.
	The cost basis and fair value of the short-term investments by contractual maturity consist of the following (in thousands):
		31-Dec-14
		Amortized Cost		Fair Value
	One year or less	$	114,231	$	114,113
	Over one year and less than two years	28,631		28,593
	Total short-term investments	$	142,862	$	142,706
	As of December 31, 2013, all of the Company’s investments had a contractual maturity of less than 12 months.
	The Company reviews the individual securities in its portfolio to determine whether a decline in a security’s fair value below the amortized cost basis is other-than-temporary. The Company determined that as of December 31, 2014 and 2013 there were no investments in its portfolio that were other-than-temporarily impaired.
	Investments in an unrealized loss position consisted of the following (in thousands):
		31-Dec-14					31-Dec-13
		Less Than 12 Months
		Fair Value		Unrealized Loss			Fair Value			Unrealized Loss
	Corporate debt securities	$	105,187	$	(147	)	$	18,204		$	(13	)
	U.S. government agency securities	15,773		(13		)	—			—
	Total short-term investments	$	120,960	$	(160	)	$	18,204		$	(13	)
	As of December 31, 2014 and 2013, no investments were in a continuous unrealized loss position for more than twelve months. The Company does not intend to sell any of these investments, and it is not more likely than not, that the Company would be required to sell these investments before recovery of their amortized cost basis, which may be at maturity.

BUSINESS_COMBINATIONS

BUSINESS COMBINATIONS	12 Months Ended
	Dec. 31, 2014
Business Combinations [Abstract]
BUSINESS COMBINATIONS	BUSINESS COMBINATIONS
	On July 18, 2013, the Company acquired all of the outstanding equity interests of YFind Technologies Private Limited (“YFind”), a privately-held software company providing indoor positioning and real-time location-based analytics. The Company acquired YFind to obtain its technology and expertise in location-based services. The purchase consideration was $6.1 million, all of which was paid in cash.
	Former YFind employees who became the employees of the Company were granted 219,782 RSUs and 51,900 stock options under the Company’s Amended & Restated 2012 Equity Incentive Plan (the “2012 Plan”). The equity awards vest between three and four years from when the employee was hired. The fair value of the equity awards will be recognized as post-acquisition compensation expense over the requisite service period. The Company is also obligated to pay retention bonuses to certain former YFind employees who became employees of the Company, over two years from the date of hire. Both the equity awards and the retention bonuses are subject to certain continued employment restrictions. For the year ended December 31, 2014 and 2013, the Company recorded compensation costs of $1.1 million and $1.0 million in research and development expenses associated with the equity awards and the retention bonuses. Acquisition related costs were not material for the year ended December 31, 2013.
	The purchase allocation for YFind is summarized as follows (in thousands):
		Fair Value
	Cash and cash equivalents	$	257
	Other tangible assets	8
	In-process research and development	6,000
	Goodwill	914
	Non-current deferred tax liabilities	(1,020		)
	Other liabilities assumed	(21		)
	Total purchase consideration	$	6,138
	Pro forma results of operations for the YFind acquisition have not been presented because they are not material to the consolidated statements of operations.

GOODWILL_AND_INTANGIBLES_ASSET

GOODWILL AND INTANGIBLES ASSETS	12 Months Ended
	Dec. 31, 2014
Goodwill and Intangible Assets Disclosure [Abstract]
GOODWILL AND INTANGIBLE ASSETS	GOODWILL AND INTANGIBLE ASSETS
	Goodwill consisted of the following (in thousands):
		Amount
	31-Dec-12	$	9,031
	Goodwill from the acquisition of YFind	914
	31-Dec-13	$	9,945
	Changes in goodwill	—
	31-Dec-14	$	9,945
	Intangible assets consisted of the following (in thousands, except years):
		Gross Carrying		Accumulated			Net		Weighted
		Amount		Amortization			Carrying		Average
							Amount		Remaining
									Life
	31-Dec-14
	Purchased technology	$	12,600	$	(5,249	)	$	7,351	2.8 years
	31-Dec-13
	Purchased technology	$	6,600	$	(2,929	)	$	3,671	2.8 years
	In-process research and development	6,000		—			6,000
	Total	$	12,600	$	(2,929	)	$	9,671
	On July 18, 2013, the Company recorded the fair value of the in-process research and development of $6.0 million related to the acquisition of YFind. In-process research and development was accounted for as an indefinite-lived intangible asset, until its completion on May 1, 2014. Following its completion, it was transferred to purchased technology and is being amortized over its estimated useful life of four years.
	Amortization expense related to the purchased technology was $2.3 million, $1.3 million and $1.3 million for the years ended December 31, 2014, 2013 and 2012, respectively. Amortization expense is included as a component of cost of revenue in the accompanying consolidated statements of operations.
	The following table presents the estimated future amortization expense of intangible assets as of December 31, 2014 (in thousands):
	Year ending December 31,	Amount
	2015	$	2,820
	2016	2,531
	2017	1,500
	2018	500
	Total amortization	$	7,351

PROPERTY_AND_EQUIPMENT_Notes

PROPERTY AND EQUIPMENT (Notes)	12 Months Ended
	Dec. 31, 2014
Property, Plant and Equipment [Abstract]
Property and Equipment	PROPERTY AND EQUIPMENT
	Property and equipment consisted of the following (in thousands, except estimated useful lives):
			31-Dec
		Estimated Useful Lives	2014			2013
	Computer hardware	3 years	$	11,167		$	7,451
	Computer software	3 years	4,070			2,396
	Machinery, equipment and tooling	2 to 3 years	10,800			8,718
	Furniture and fixtures	7 years	1,584			1,572
	Leasehold improvements	3 to 10 years	3,911			2,981
	Total property and equipment		31,532			23,118
	Less: accumulated depreciation and amortization		(17,896		)	(11,646		)
	Total property and equipment, net		$	13,636		$	11,472
	For the years ended December 31, 2014, 2013 and 2012, expense related to depreciation and amortization of property and equipment was $7.3 million, $5.3 million and $3.5 million respectively.

DEFERRED_REVENUE

DEFERRED REVENUE	12 Months Ended
	Dec. 31, 2014
Deferred Revenue Disclosure [Abstract]
DEFERRED REVENUE	DEFERRED REVENUE
	Deferred revenue consisted of the following (in thousands):
		December 31,
		2014		2013
	Product	$	22,900	$	21,732
	Service	26,885		18,505
	Total deferred revenue	$	49,785	$	40,237
	Reported as:
	Current	$	39,231	$	33,139
	Non-current	10,554		7,098
	Total deferred revenue	$	49,785	$	40,237
	Deferred product revenue relates to arrangements where not all revenue recognition criteria have been met. Deferred service revenue represents support contracts and software as a service contracts billed in advance and revenue is recognized ratably over the service period, typically one to five years.

COMMITMENTS_AND_CONTINGENCIES

COMMITMENTS AND CONTINGENCIES	12 Months Ended
	Dec. 31, 2014
Commitments and Contingencies Disclosure [Abstract]
COMMITMENTS AND CONTINGENCIES	COMMITMENTS AND CONTINGENCIES
	Operating Leases—The Company’s primary facilities are located in Sunnyvale, California, Shenzhen, China, Singapore, Taipei, Taiwan, Bangalore, India and Woodburn Green, United Kingdom and are leased under non-cancelable operating lease arrangements. Rent expense was $4.7 million, $4.4 million, and $2.9 million for the years ended December 31, 2014, 2013 and 2012, respectively.
	Future minimum lease payments under non-cancelable operating leases are as follows (in thousands):
	Years ending December 31,	Amount
	2015	$	3,997
	2016	3,190
	2017	2,789
	2018	2,590
	2019	2,544
	Thereafter	7,489
	Operating lease obligations	$	22,599
	Litigation— The Company is involved in legal proceedings, claims, and litigation arising in the ordinary course of business. Management is not currently aware of any matters that it expects will have a material adverse effect on the consolidated financial position, results of operations, or cash flows of the Company.
	For the year ended December 31, 2014, the Company settled several patent litigation claims for a net gain of $0.8 million, which is included in general and administrative expense in the consolidated statements of operations. The Company did not have any material settlement gains or losses for the years ended December 31, 2013 and 2012.
	Purchase Commitments— As of December 31, 2014, the Company had current purchase commitments of $15.2 million for inventory and specific contractual services.
	Indemnification Agreements— The Company indemnifies its directors for certain events or occurrences, subject to certain limits, while the director is or was serving at the Company’s request in such capacity. The term of the indemnification period is for the director’s term of service. The Company may terminate the indemnification agreements with its directors upon the termination of their services as directors of the Company, but termination will not affect claims for indemnification related to events occurring prior to the effective date of termination. The maximum amount of potential future indemnification is unlimited; however, the Company has a director insurance liability policy that limits its exposure. The Company believes the fair value of these indemnification agreements is minimal. The Company has also entered into customary indemnification agreements with each of its officers.
	The Company indemnifies its channel partners against certain claims alleging that the Company’s products (excluding custom products and/or custom support) infringe a patent, copyright, trade secret, or trademark, provided that a channel partner promptly notifies the Company in writing of the claim and such channel partner cooperates with the Company and grants the Company the authority to control the defense and any related settlement.
	The Company has not recorded any liabilities for these agreements as of December 31, 2014 and 2013.
	Reimbursement of Penalties— As of December 30, 2014 and 2013, the Company held $5.0 million in escrow to secure an indemnification agreement. If triggered, the Company will indemnify a channel partner for reimbursement of penalties assessed under the IT Act. The IT Act specifies penalties for network service providers in the event of illegal or unauthorized use of computers, computer systems and data stored therein. In the event that Ruckus equipment is the cause of a network service provider breach, the Company is required to indemnify the channel partner, without limitation to the amount, for penalties reimbursed by the channel partner to the network service provider under the IT Act. The indemnification period is six years, which began in April 2013. To date no claims have been made under the IT Act, for which the Company would be potentially liable.
	Warranties— The Company generally offers a limited lifetime hardware warranty on its indoor WLAN products and a limited warranty for all other hardware products for a period of up to one year. The Company estimates the costs that may be incurred under its warranties and records a liability for products sold as a charge to cost of revenue. Estimates of future warranty costs are largely based on historical experience of product failure rates and material usage incurred in correcting product failures. The Company periodically assesses the adequacy of its recorded warranty liability and adjusts the amounts as necessary.
	The warranty liability is included as a component of accrued liabilities in the accompanying consolidated balance sheets. Changes in the warranty liability were as follows (in thousands):
		Years Ended December 31,
		2014			2013			2012
	Balance at beginning of year	$	1,038		$	725		$	489
	Changes in existing warranty	(216		)	(41		)	47
	Warranty expense	955			1,528			784
	Obligations fulfilled	(974		)	(1,174		)	(595		)
	Balance at end of year	$	803		$	1,038		$	725

EQUITY_AWARD_PLAN

EQUITY AWARD PLAN	12 Months Ended
	Dec. 31, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
EQUITY AWARD PLAN	EQUITY AWARD PLAN
	Stock Option Plans—The Company has two equity incentive plans: the 2002 Stock Incentive Plan (the "2002 Plan") and the 2012 Plan. Effective January 31, 2012, the Company’s board of directors terminated the 2002 Plan. The 2012 Plan is the successor to and continuation of the 2002 Plan. The 2012 Plan was subsequently amended and restated in July 2012 and further amended in September 2012, and approved by the Company’s stockholders in October 2012.
	The Company’s 2012 Plan provides for the granting of stock options, restricted stock awards, RSUs, stock appreciation rights, and performance shares to employees, directors, and consultants. Awards granted under the 2012 Plan vest over the periods determined by the board of directors, generally one to four years, beginning from the vesting commencement date, and expire no more than 10 years from the date of grant.
	The maximum number of shares of common stock that may be issued under the Company’s 2012 Plan is 32,000,000, which includes shares reserved for issuance under the 2002 Stock Plan at the time the 2012 Plan became effective, and any shares granted under the 2002 Plan that would have otherwise returned to the 2002 Plan. Each year on January 1, starting in January 2013, the maximum number of shares that may be issued increases by the lesser of, 5% of the total number of shares of the Company's capital stock outstanding on December 31 of the preceding year, or a lesser number of shares as determined by the board of directors. As of December 31, 2014 and 2013, 29.3 million and 29.2 million shares were authorized for issuance under these plans.
	Employee Stock Purchase Plan—The ESPP was adopted by the board of directors and approved by the stockholders on October 5, 2012 and was effective upon completion of the Company’s initial public offering.
	Under the Company's ESPP, the Company can grant stock purchase rights to all eligible employees during a one year offering period with purchase dates at the end of each six-month purchase period. Each six month purchase period will begin on the first trading date on or after May 16 and November 16 of each year. Shares are purchased through the accumulation of employees' payroll deductions, up to a maximum of 15% of employees' compensation for each purchase period, at purchase prices equal to 85% of the lesser of the closing price of the Company’s common stock on the first trading day of the applicable offering period or the purchase date. No participant may purchase more than $25,000 worth of common stock or 2,000 shares of common stock in any one year offering period. The ESPP is compensatory and results in compensation expense.
	At the time the ESPP became effective, a total of 1,500,000 shares of common stock were reserved for issuance. The number of shares of common stock reserved for issuance under the ESPP will increase automatically each year on January 1, starting in January 2013, continuing through and including January 1, 2022, by the lesser of (i) 2% of the total number of shares of the common stock outstanding on December 31 of the preceding calendar year; (ii) 3,000,000 shares of common stock; or (iii) such lesser number of shares as determined by the board of directors. Shares subject to purchase rights granted under the ESPP that terminate without having been exercised in full will not reduce the number of shares available. As of December 31, 2014 and 2013, approximately 3.8 million and 2.6 million shares were authorized for issuance under the ESPP. Employees purchased approximately 482,000 shares of common stock at an average exercise price of $8.91 during the year ended December 31, 2014.
	Stock Option Activity
	The following table summarizes the outstanding stock option activity (in thousands, except per share amounts and years):
		Options Outstanding
		Number of		Weighted				Weighted		Aggregate
		Shares		Average				Average		Intrinsic
				Exercise Price Per Share				Remaining		Value
								Contractual Life (Years)
	Balance, December 31, 2013	19,609		$	4.51			7.3		$	195,142
	Options granted	1,585		13
	Options exercised	-3,618		2.11
	Options forfeited	-534		10.94
	Balance, December 31, 2014	17,042		$	5.6			6.7		$	119,782
	Options exercisable as of December 31, 2014	11,278		$	3.74			6		$	97,008
	Options vested and expected to vest as of December 31, 2014	16,853		$	5.54			6.7		$	119,331
	The weighted average grant date fair value of stock options was approximately $7.42, $10.33 and $3.91 for the years ended December 31, 2014, 2013 and 2012, respectively.
	The total intrinsic value of options exercised was approximately $39.0 million, $74.1 million and $4.8 million for the years ended December 31, 2014, 2013 and 2012, respectively.
	RSU Activity
	The following table summarizes the outstanding activity of RSUs (in thousands, except per share amounts and years):
		RSUs Outstanding
		Number of Shares			Weighted				Weighted		Aggregate
					Average				Average		Intrinsic
					Grant Date Fair Value				Remaining		Value
					Per Share				Contractual Life (Years)
	Balance, December 31, 2013	1,011			$	17.11			1.6		$	14,356
	RSUs granted	2,289			12.7
	RSUs vested	(319	)		17.53
	RSUs forfeited	(156	)		14.27
	Balance, December 31, 2014	2,825			$	13.65			1.7		$	33,955
	The weighted average grant date fair value of RSUs was approximately $12.70 and $17.10 for the years ended December 31, 2014 and 2013, respectively. No RSUs were granted for the year ended December 31, 2012.
	The aggregate fair value of RSUs vested as of the respective vesting dates, was approximately $4.2 million for the year ended December 31, 2014. No RSUs vested during the years ended December 31, 2013 and 2012.
	Shares Available for Grant
	The following table summarizes the stock activity and the total number of shares available for grant under the 2012 Plan as of December 31, 2014 (in thousands):
		Number of
		Shares
	Balance, December 31, 2013	8,547
	Additional shares reserved for issuance	4,035
	Options granted	(1,585	)
	Options forfeited	534
	RSUs granted	(2,289	)
	RSUs forfeited	156
	Balance, December 31, 2014	9,398
	Fair Value Disclosures
	The Company measures compensation expense for all stock-based payment awards, including stock options and RSUs granted to employees and under the ESPP, based on the estimated fair values on the date of the grant. The fair value of each stock option granted is estimated using the Black-Scholes option pricing model. The fair value of each RSU granted represents the closing price of the Company’s common stock on the date of grant. The fair value of purchases under the Company’s ESPP is calculated based on the closing price of the Company’s stock on the date of grant and the value of put and call options estimated using the Black-Scholes option pricing model. Stock-based compensation is recognized on a straight-line basis over the requisite service period, net of estimated forfeitures. The forfeiture rate is based on an analysis of the Company’s actual historical forfeitures.
	The Company accounts for stock options issued to non-employees based on the fair value of the awards determined using the Black-Scholes option pricing model. The fair value of stock options granted to non-employees is re-measured as the stock options vest, and the resulting change in fair value, if any, is recognized in the Company’s consolidated statement of operations during the period the related services are rendered.
	The determination of the fair value of options using the Black-Scholes option pricing model is affected by the following assumptions:
	Expected Term-The Company’s expected term represents the period that the Company’s stock-based awards are expected to be outstanding and was calculated as the average of the option vesting and contractual terms, based on the simplified method provided by the Securities and Exchange Commission’s Staff Accounting Bulletin No. 110. The simplified method is used due to the lack of historical exercise data. The expected term for the ESPP is based on the term of the purchase period.
	Volatility-The Company determined the share price volatility factor based on historical volatility of its peer group due to the limited trading history of its common stock.
	Risk-Free Interest Rate-The risk-free interest rate is based on the U.S. Treasury zero coupon issues with remaining terms similar to the expected term of the stock option grants.
	Dividend Yield-The Company has never declared or paid any cash dividends and does not presently plan to pay cash dividends in the foreseeable future.
	Employee Stock Options
	The following table summarizes the weighted average assumptions relating to the Company’s stock options:
		Years Ended December 31,
		2014			2013			2012
	Volatility	60.7	%		67.4	%		69.1	%
	Expected term (years)	6.1			6.1			6
	Risk-free interest rate	1.9	%		1.9	%		1	%
	Dividend yield	—			—			—
Employee Stock Purchase Plan
The following table summarizes the weighted average assumptions relating to the Company’s ESPP:
	Years Ended December 31,
	2014			2013
Volatility	40.2	%		59.6	%
Expected term (years)	0.7			0.7
Risk-free interest rate	0.1	%		0.1	%
Dividend yield	—			—
Stock-based Compensation Expense
The following table summarizes the stock-based compensation expense recorded for stock awards issued to employees and non-employees (in thousands):
	Years Ended December 31,
	2014				2013				2012
Cost of revenue	$	1,092			$	818			$	243
Research and development	9,099				6,738				2,409
Sales and marketing	7,180				4,922				1,787
General and administrative	9,223				6,637				4,012
Total stock-based compensation	26,594				19,115				8,451
Tax benefit from stock-based compensation	(688		)		(1,535		)		(2,417		)
Total stock-based compensation, net of tax effect	$	25,906			$	17,580			$	6,034
At December 31, 2014, the total unrecognized stock-based compensation expense under the Company’s stock plans was $64.3 million, net of estimated forfeitures. The unamortized expense will be recognized over a weighted-average period of 2.2 years.
For the year ended December 31, 2013, the Company recognized $0.4 million in stock-based compensation related to the cash settlement of equity awards held by former YFind employees.

EARNINGS_PER_SHARE

EARNINGS PER SHARE	12 Months Ended
	Dec. 31, 2014
Earnings Per Share [Abstract]
EARNINGS PER SHARE	EARNINGS PER SHARE
	Basic net income per common share is computed by dividing the net income attributable to common stockholders by the weighted-average number of common shares outstanding during the period. Diluted net income per share attributable to common stockholders is computed by dividing the net income attributable to common stockholders by the weighted-average number of common shares outstanding, including potential dilutive common shares assuming the dilutive effect of outstanding stock awards using the treasury stock method. Under the treasury stock method, the amount the employee must pay for exercising stock awards, the amount of compensation cost for future service that the Company has not yet recognized, and the amount of tax benefits that would be recorded in additional paid-in capital when the award becomes deductible, are collectively assumed to repurchase shares.
	For the year ended December 31, 2012, basic and diluted net income per common share was computed using the two-class method required for participating securities. Prior to the IPO, holders of convertible preferred stock were each entitled to receive non-cumulative dividends. Under the two-class method, net income attributable to common stockholders is determined by allocating undistributed earnings, calculated as net income less current period preferred stock non-cumulative dividends, between common stock and preferred stock. Concurrent with the closing of the IPO in November 2012, all shares of outstanding preferred stock automatically converted into shares of the Company’s common stock and the two-class method was no longer required, as the Company had one class of securities.
	The following table presents the calculation of basic and diluted net income per share (in thousands, except per share data):
		Years Ended December 31,
		2014			2013			2012
	Numerator:
	Net income	$	8,190		$	1,789		$	31,704
	Less: Undistributed earnings allocated to participating securities	—			—			(22,668		)
	Net income attributable to common stockholders, basic and diluted	$	8,190		$	1,789		$	9,036
	Denominator:
	Weighted-average shares used in computing basic net income per share attributable to common stockholders	82,908			76,744			24,847
	Weighted-average effect of potentially dilutive shares:
	Employee stock options	10,538			16,442			12,788
	RSUs and ESPP	222			175			140
	Diluted	93,668			93,361			37,775
	Net income per share attributable to common stockholders:
	Basic	$	0.1		$	0.02		$	0.36
	Diluted	$	0.09		$	0.02		$	0.24
	The following table summarizes the weighted average outstanding stock awards that were excluded from the diluted per share calculation because to include them would have been anti-dilutive for the period (in thousands):
		Years Ended December 31,
		2014		2013			2012
	Stock options	2,649		1,134			3,348
	RSUs and ESPP	977		233			—
	Total	3,626		1,367			3,348

INCOME_TAXES

INCOME TAXES	12 Months Ended
	Dec. 31, 2014
Income Tax Disclosure [Abstract]
INCOME TAXES	INCOME TAXES
	The domestic and foreign components of income (loss) before the provision for income taxes for the years ended December 31, 2014, 2013 and 2012 were as follows (in thousands):
		Years Ended December 31,
		2014			2013			2012
	Domestic	$	13,107		$	(1,015	)	$	13,235
	Foreign	1,023			905			1,231
	Total	$	14,130		$	(110	)	$	14,466
	During the years ended December 31, 2014, 2013 and 2012, the Company’s income tax expense (benefit) was as follows (in thousands):
		Years Ended December 31,
		2014			2013			2012
	Current expense:
	Federal	$	8,224		$	1,880		$	—
	State	999			143			317
	Foreign	1,257			1,006			762
	Total current expense	10,480			3,029			1,079
	Deferred benefit:
	Federal	(2,936		)	(3,445		)	(13,805		)
	State	(1,259		)	(1,172		)	(4,467		)
	Foreign	(345		)	(311		)	(45		)
	Total deferred benefit	(4,540		)	(4,928		)	(18,317		)
	Total income tax expense (benefit)	$	5,940		$	(1,899	)	$	(17,238	)
	The difference between the income tax expense (benefit) and the amount computed by applying the statutory federal income tax rate to the income (loss) before income taxes is as follows (in thousands):
		Years Ended December 31,
		2014			2013			2012
	Federal statutory rate	$	4,945		$	(38	)	$	4,918
	State taxes, net of federal income tax benefit	602			86			417
	Non-deductible expenses	246			209			134
	Stock-based compensation	2,209			1,535			701
	Preferred stock warrant liability	—			—			966
	Acquisition cost	—			110			—
	Foreign tax deduction	(153		)	(101		)	—
	Tax credits	(2,502		)	(4,020		)	(884		)
	Foreign tax rate differential	393			324			273
	Other items not individually material	200			(4		)	116
	Change in statutory rate	—			—			(262		)
	Change in valuation allowance	—			—			(23,617		)
	Total income tax expense (benefit)	$	5,940		$	(1,899	)	$	(17,238	)
	The Company records deferred tax assets if the realization of such assets is more likely than not. Significant management judgment is required in determining whether a valuation allowance against the Company’s deferred tax assets is required. The Company has considered all available evidence, both positive and negative, such as historical levels of income and predictability of future forecasts of taxable income, in determining whether a valuation allowance is required. The Company is also required to forecast future taxable income in accordance with accounting standards that address income taxes to assess the appropriateness of a valuation allowance, which further requires the exercise of significant management judgment.
	As of December 31, 2014, the Company had cumulative net income before tax for the three years then ended. Based on its historical operating performance, as well as the Company’s expectation that its operations will generate sufficient taxable income in future periods to realize the tax benefits associated with the deferred tax assets, the Company has concluded that it was more likely than not that the Company would be able to realize the benefit of the U.S. federal and state deferred tax assets in the future. As a result, the Company did not record a valuation allowance against its net deferred tax assets during the year ended December 31, 2014.
	The Company will continue to assess the need for a valuation allowance on the deferred tax assets by evaluating both positive and negative evidence that may exist on a quarterly basis. Any adjustment to the deferred tax asset valuation allowance would be recorded in the statement of operations for the period that the adjustment is determined to be required.
	Significant components of the Company’s deferred tax assets and liabilities are as follows (in thousands):
		As of December 31,
		2014			2013
	Deferred tax assets:
	Accruals and reserves	$	2,645		$	1,641
	Tax credits	4,416			6,719
	Fixed assets and intangibles, other than goodwill	3,913			3,402
	Net operating losses	1,426			1,645
	Stock-based compensation	11,023			7,131
	Deferred revenue	2,560			1,448
	Other	2,177			1,517
	Total deferred tax assets	28,160			23,503
	Deferred tax liabilities
	Intangible assets	(850		)	(1,020		)
	Goodwill	(535		)	(305		)
	Net deferred tax assets	$	26,775		$	22,178
	As reported:
	Current deferred tax asset	$	6,205		$	7,715
	Non-current deferred tax assets	21,166			15,317
	Non-current deferred tax liabilities	(596		)	(854		)
	Net deferred tax assets	$	26,775		$	22,178
	As of December 31, 2014, the Company had net operating loss carryforwards of approximately $39.5 million for federal purposes, $50.1 million for state purposes, and $3.8 million for foreign purposes. If not utilized, these carryforwards will begin to expire in 2033 for federal purposes and 2019 for state purposes. Foreign carryforwards will not expire. As a result of certain realization requirements of the accounting guidance for stock-based compensation, the table of deferred tax assets and liabilities shown above does not include certain deferred tax assets at December 31, 2014 and 2013 that arose directly from (or the use of which was postponed by) tax deductions related to equity compensation in excess of compensation recognized for financial reporting. Approximately $39.4 million of federal net operating losses, $29.9 million of state net operating losses, and $2.3 million of foreign net operating losses relate to stock compensation deductions in excess of book expense, the tax effect of which would be to credit additional paid-in capital if realized.
	The Company has research credit carryforwards of approximately $7.9 million for federal purposes and $8.3 million for California purposes. If not utilized, the federal carryforward will begin to expire in 2024. The California credit carryforward will not expire. The Federal research credits and $3.9 million of the California research credits, when realized, will result in a credit to additional paid-in capital.
	The Company uses the accounting guidance on a with and without approach under ASC Topic 740 Income Taxes, for the purpose of determining when excess tax benefits have been realized.
The Tax Reform Act of 1986 limits the use of net operating loss and tax credit carryforwards in certain situations where stock ownership changes occur. In the event the Company has had a change in ownership, the future utilization of the Company’s net operating loss and tax credit carryforwards could be limited.
The undistributed earnings from the Company’s foreign subsidiaries are not subject to a United States tax provision because it is management’s intention to permanently reinvest such undistributed earnings outside of the United States. The Company evaluates its circumstances and reassesses this determination on a periodic basis. As of December 31, 2014, the determination of the unrecorded deferred tax liability related to these earnings was immaterial. If circumstances change and it becomes apparent that some or all of the undistributed earnings of the Company’s foreign subsidiaries will be remitted in the foreseeable future, the Company will be required to recognize a deferred tax liability on those amounts.
The Company has foreign tax credit carryforwards of approximately $0.5 million for federal purposes. If not utilized, the federal carryforward will begin to expire in 2019.
The Company maintains liabilities for uncertain tax positions. These liabilities involve considerable judgment and estimation and are continuously monitored by management based on the best information available, including changes in tax regulations, the outcome of relevant court cases, and other information. As of December 31, 2014, 2013 and 2012, the Company’s total amount of unrecognized tax benefit was approximately $3.3 million, $2.4 million, and $0.8 million, respectively. These amounts are primarily related to the Company’s research and development tax credits and tax accruals.
As of December 31, 2014, the Company’s total amount of unrecognized tax benefit was approximately $3.3 million. If recognized, approximately $2.7 million would impact the effective tax rate. The Company does not expect its unrecognized tax benefits to change materially over the next 12 months.
A reconciliation of the beginning and ending balances of the total amounts of unrecognized tax benefits for the years ended December 31, 2014, 2013 and 2012 is as follows (in thousands):
	As of December 31,
	2014			2013			2012
Balance at beginning of year	$	2,397		$	836		$	937
Additions related to current year tax positions	858			1,394			218
Additions related to prior year tax positions	—			167			—
Reductions related to prior year tax positions	(3		)	—			(319		)
Balance at end of year	$	3,252		$	2,397		$	836
During the year ended December 31, 2014 and cumulatively, the Company recognized an immaterial amount of interest and penalties associated with unrecognized tax benefits.
The Company files income tax returns with the United States federal government, various states and certain foreign jurisdictions. The Company’s tax years ended December 31, 2003 through December 31, 2014 remain open to audit for federal and California purposes. These years are open due to net operating losses and tax credits unutilized from such years. The Company’s tax years ended December 31, 2009 through December 31, 2014 remain open to audits for its foreign subsidiaries.

EMPLOYEE_SAVINGS_AND_RETIREMEN

EMPLOYEE SAVINGS AND RETIREMENT PLAN	12 Months Ended
	Dec. 31, 2014
Compensation and Retirement Disclosure [Abstract]
EMPLOYEE SAVINGS AND RETIREMENT PLAN	EMPLOYEE BENEFIT PLAN
	The Company sponsors a defined contribution plan under Internal Revenue Service Code 401(k) (the “401(k) Plan”). Most United States employees are eligible to participate following the start of their employment, at the beginning of each calendar month. Employees may contribute up to the lesser of 100% of their current compensation to the 401(k) Plan or an amount up to a statutorily prescribed annual limit. The Company does not match employee contributions to the 401(k) Plan.

SEGMENT_INFORMATION

SEGMENT INFORMATION	12 Months Ended
	Dec. 31, 2014
Segment Reporting [Abstract]
SEGMENT INFORMATION	SEGMENT INFORMATION
	The Company operates as one reportable and operating segment, selling gateways, controllers and access points along with related software and services.
	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, or decision making group, in deciding how to allocate resources and in assessing performance. The Company’s chief operating decision maker is its chief executive officer. The Company’s chief executive officer reviews financial information presented on a consolidated basis for purposes of allocating resources and evaluating financial performance. The Company has one business activity, and there are no segment managers who are held accountable for operations, operating results and plans for products or components below the consolidated unit level. Accordingly, the Company reports as a single operating segment. The Company's chief executive officer evaluates performance based primarily on revenue in the geographic locations in which the Company operates. Revenue is attributed by geographic location based on the bill-to location of the Company’s customers.
	The following presents total revenue by geographic region (in thousands):
		Years Ended December 31,
		2014		2013		2012
	Americas:
	United States	$	159,548	$	118,333	$	91,597
	Other Americas	9,670		12,604		5,135
	Total Americas	169,218		130,937		96,732
	EMEA:
	United Kingdom	24,715		28,129		20,862
	Other EMEA	59,351		43,884		28,429
	Total EMEA	84,066		72,013		49,291
	APAC:
	Japan	13,935		17,069		27,462
	Other APAC	59,700		43,048		41,168
	Total APAC	73,635		60,117		68,630
	Total revenue	$	326,919	$	263,067	$	214,653
	As of December 31, 2014, the Company had property and equipment, net, of $8.9 million, $0.6 million and $4.1 million located in the Americas, EMEA, and APAC respectively.

DESCRIPTION_OF_BUSINESS_AND_SU1

DESCRIPTION OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)	12 Months Ended
	Dec. 31, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Description of Business	Description of Business— Ruckus Wireless, Inc. (“Ruckus”) is a global supplier of advanced, carrier-class Wi-Fi solutions. Ruckus’ solutions, which are called Smart Wi-Fi, are used by service providers and enterprises to solve a range of network capacity, coverage and reliability challenges associated with increasing wireless traffic demands created by the growth in the number of users equipped with more powerful smart wireless devices using increasingly data rich applications and services. Ruckus markets and sells its products and technology directly and indirectly through a vast network of channel partners to a variety of service providers and enterprises around the world. Its Smart Wi-Fi solutions offer carrier-class features and functionality such as enhanced reliability, consistent performance, extended range and massive scalability. Ruckus’ products include high capacity, high-speed hardware gateways, controllers, wireless bridges and indoor and outdoor access points, software platforms providing gateway, controller and reporting, analytics and management solutions, and unique Wi-Fi-related cloud services such as location-based positioning (“LBS”) and public access. These hardware and software products and cloud services incorporate various elements of Ruckus’ proprietary technologies, including Smart Radio, SmartCast, SmartMesh, SmartCell and Smart Scaling, to enable high performance in a variety of challenging operating environments.
Principles of Consolidation	Principles of Consolidation—The consolidated financial statements include the accounts of Ruckus and its wholly owned subsidiaries (collectively, the “Company”). All intercompany balances and transactions have been eliminated in consolidation.
Use of Estimates	Use of Estimates—The preparation of financial statements in conformity with generally accepted accounting principles (“GAAP”) in the United States of America requires management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. Significant estimates and assumptions made by management include the determination of revenue recognition, inventory, goodwill and intangible asset valuation, accounting for income taxes, stock-based compensation and warranty liability. Management bases its estimates on historical experience and also on assumptions that it believes are reasonable. Actual results could materially differ from those estimates.
Concentrations of Credit Risk and Significant Customers	Concentrations of Credit Risk and Significant Customers—Financial instruments that subject the Company to significant concentrations of credit risk primarily consist of cash, cash equivalents, short-term investments and accounts receivable. The Company invests only in high credit quality instruments and maintains its cash equivalents and short-term investments in fixed income securities. Management believes that the financial institutions that hold the Company’s investments are financially sound and, accordingly, are subject to minimal credit risk. Deposits held with banks may exceed the amount of insurance provided on such deposits. The Company’s accounts receivable are primarily derived from distributors and service providers located in the Americas, Europe, and Asia Pacific. The Company generally does not require its customers to provide collateral to support accounts receivable. To reduce credit risk, management performs ongoing credit evaluations of its customers’ financial condition. The Company has recorded an allowance for doubtful accounts for those receivables management has determined to not be collectible.
	The percentages of revenue from individual customers totaling greater than 10% of total consolidated Company revenue were as follows:
		Years Ended December 31,
		2014		2013			2012
	Distributor A	14.8	%	15.2	%		16.3	%
	Distributor B	12.5	%	12.4	%		*
	Distributor C	10.9	%	*			*
	Distributor D	*		*			12.5	%
	*    Less than 10%
	Each of the Company’s greater than 10% customers are third-party distributors, and in 2013 and 2014, no single value added reseller or end customer accounted for more than 10% of the Company's total consolidated revenue.
	The percentage of receivables from individual customers totaling greater than 10% of total consolidated Company accounts receivable were as follows:
		December 31,
		2014		2013
	Distributor C	12.5	%	10.4	%
	Distributor A	*		11.6	%
	Distributor E	*		11.2	%
	*    Less than 10%
Cash and Cash Equivalents	Cash and Cash Equivalents—The Company considers all highly liquid financial instruments with original maturities of 90 days or less to be cash equivalents. Cash and cash equivalents are stated at cost, which approximates fair value. The Company’s cash equivalents included interest-bearing bank accounts, money market funds and corporate debt securities.
Restricted Cash	Restricted Cash—As of December 31, 2014, the Company held $5.0 million in escrow to secure an indemnification agreement. If triggered, the Company will indemnify a channel partner for reimbursement of penalties assessed under the Information Technology Act of India (“IT Act”). Refer to “Reimbursement of Penalties” in Note 8.
Fair Value of Financial Instruments	Fair Value of Financial Instruments—The Company defines fair value as the price that would be received from selling an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. When determining the fair value measurements for assets and liabilities which are required to be recorded at fair value, the Company considers the principal or most advantageous market in which to transact and the market-based risk. The Company applies fair value accounting for all financial assets and liabilities that are recognized or disclosed at fair value in the financial statements on a recurring basis. The carrying amounts reported in the consolidated financial statements approximate the fair value for cash and cash equivalents, accounts receivable, accounts payable, and accrued liabilities, due to their short-term nature.
Short-Term Investments	Short-Term Investments—The Company’s short-term investments consist primarily of corporate debt securities and U.S government agency securities. The Company classifies investments as available-for-sale at the time of purchase. As Ruckus views these securities as available to support current operations, the Company classify securities with maturities beyond 12 months as current assets. Ruckus’ policy is to protect the value of its investment portfolio and minimize principal risk by earning returns based on current interest rates.
	Available-for-sale investments are initially recorded at cost and periodically adjusted to fair value in the consolidated balance sheets. Unrealized gains and losses on these investments are reported as a separate component of accumulated other comprehensive income (loss). Realized gains and losses are reported in the consolidated statements of operations. A specific identification method is used to determine the cost basis of the short-term investments sold. The effects of reclassifications from accumulated other comprehensive loss to the income statement were insignificant for all periods presented. The investments are adjusted for the amortization of premiums and discounts until maturity and such amortization is included in interest income (expense).
	Investments are considered impaired when a decline in fair value is judged to be other-than-temporary. The Company consults with its investment managers and considers available quantitative and qualitative evidence in evaluating potential impairment of the investments on a quarterly basis. If the cost of an individual investment exceeds its fair value, the Company evaluates, among other factors, general market conditions, the duration and extent to which the fair value is less than cost, and the Company’s intent and ability to hold the investment. Once a decline in fair value is determined to be other-than-temporary, the Company will record an impairment charge and establish a new cost basis in the investment. During the year ended December 31, 2014 and 2013, the Company did not consider any of its investments to be other-than-temporarily impaired.
Allowance for Doubtful Accounts	Allowance for Doubtful Accounts—The Company records an allowance for doubtful accounts based on historical experience and a detailed assessment of the collectability of its accounts receivable. In estimating the allowance for doubtful accounts, management considers, among other factors, the aging of the accounts receivable, historical write-offs, and the credit-worthiness of each customer. If circumstances change, such as higher-than-expected defaults or an unexpected material adverse change in a major customer’s ability to meet its financial obligations, the Company’s estimate of the recoverability of the amounts due could be reduced by a material amount.
	Activity in the allowance for doubtful accounts was as follows (in thousands):
		Years Ended December 31,
		2014			2013				2012
	Balance at beginning of year	$	400		$	140			$	117
	Charged to expenses	400			911				179
	Write-offs	—			(651		)		(156		)
	Balance at end of year	$	800		$	400			$	140
Inventories	Inventories—Inventories are carried at the lower of cost or market, on a first-in, first-out basis. The Company evaluates inventory for excess and obsolete products, based on management’s assessment of future demand, market conditions and technical obsolescence. The Company subcontracts manufacturing of substantially all of its products. At December 31, 2014 and 2013, inventories were predominately comprised of finished goods.
Deferred Costs	Deferred Costs—When the Company’s products have been delivered, but the product revenue associated with the arrangement has been deferred as a result of not meeting the revenue recognition criteria (see “Revenue Recognition” below), the related product costs are also deferred if the inventory is deemed recoverable. The deferred costs are recognized in cost of revenues when the related deferred revenue is recognized or when the inventory is deemed unrecoverable.
Property, Plant and Equipment, Net	Property and Equipment—Property and equipment are stated at cost, less accumulated depreciation and amortization. Depreciation is calculated using the straight-line method over the estimated useful lives of the respective assets. Leasehold improvements are amortized using the straight-line method over the shorter of the estimated useful lives of the leasehold improvements or the term of the related lease.
Goodwill	Goodwill— Goodwill represents the excess of the purchase price of an acquired business over the fair value of the underlying net tangible and intangible assets. The Company evaluates goodwill for impairment annually in the fourth quarter or whenever events or changes in circumstances indicate the carrying value of goodwill may not be recoverable. Triggering events that may indicate impairment include, but are not limited to, a significant adverse change in customer demand or business climate that could affect the value of goodwill or a significant decrease in expected cash flows. The Company performs the impairment testing by first assessing qualitative factors to determine whether the existence of events or circumstances leads to a determination that it is more likely than not that the fair value of its reporting unit is less than its carrying amount. If, after assessing the totality of events or circumstances, the Company determines it is more likely than not that the fair value of a reporting unit is less than its carrying amount, the Company performs a two-step impairment test. The first step requires the identification of the reporting units and comparison of the fair value of a reporting unit with its carrying amount, including goodwill. If the fair value of the reporting unit is less than its carrying value, an indication of goodwill impairment exists for the reporting unit and the second step of the impairment test is performed to compute the amount of the impairment. Under the second step, an impairment loss is recognized for any excess of the carrying amount of the reporting unit's goodwill over the implied fair value of that goodwill. We have determined that we have only one reporting unit. For the years ended December 31, 2014, 2013 and 2012, no impairment has been recognized related to the goodwill balance.
Intangible Assets, Net	Intangible Assets— Intangible assets consist of purchased technology resulting from acquisitions. The purchased technology intangible assets are recorded at fair value and are amortized on a straight-line basis over their estimated useful live
Impairment of Long-Lived Assets	Impairment of Long-Lived Assets—
Revenue Recognition	Revenue Recognition—The Company generates revenue from sales of our products and services through a direct sales force and indirect relationships with its channel partners. Revenue is recognized when all of the following criteria are met:
	•	Persuasive evidence of an arrangement exists.  The Company relies upon sales contracts and purchase orders to determine the existence of an arrangement.
	•	Delivery has occurred.  Delivery is deemed to have occurred when title has transferred. The Company uses shipping documents to verify transfer of title.
	•	The fee is fixed or determinable.  The Company assess whether the fee is fixed or determinable based on the terms associated with the transaction.
	•	Collectability is reasonably assured.  The Company assess collectability as sales occur, based on an analysis of the customer's credit and payment history.
	Certain of the Company's arrangements are multiple-element arrangements and may include hardware, post-contract support (“PCS”), stand-alone software and software as a service. All of its products and services qualify as separate units of accounting. For multiple-element arrangements, the Company allocates revenue to each unit of accounting based on an estimated selling price at the inception of the arrangement. The total arrangement consideration is allocated to each separate unit of accounting using the relative estimated selling prices of each unit. The Company limits the amount of revenue recognized for delivered elements to an amount that is not contingent upon future delivery of additional products or services.
	To determine the estimated selling price in multiple-element arrangements, the Company first looks to establish vendor specific objective evidence (“VSOE”), of the selling price using the prices charged for a deliverable when sold separately. If VSOE of the selling price cannot be established for a deliverable, the Company looks to establish third-party evidence (“TPE”), of the selling price by evaluating the pricing of similar and interchangeable competitor products or services in standalone arrangements. However, as our products contain a significant element of proprietary technology and offer substantially different features and functionality from our competitors, we have been unable to obtain comparable pricing information with respect to our competitors’ products. Therefore, we have not been able to obtain reliable evidence of TPE of the selling price. If neither VSOE nor TPE of the selling price can be established for a deliverable, we establish best estimate selling price (“BESP”), by reviewing historical transaction information and considering several other internal factors including discounting and margin objectives.
	The Company regularly reviews estimated selling price of the product offerings and maintain internal controls over the establishment and updates of these estimates. The Company currently does not expect a material impact in the near term from changes in estimated selling prices, including VSOE of selling price.
	Product Revenue. The Company's product revenue consists of revenue from sales of its hardware and perpetual software licenses and is net of allowances for estimated sales returns, product rebates, stock rotations, and other programs based on historical experience.
	The Company's hardware deliverables typically include proprietary operating system software, which together deliver the essential functionality of its products. Therefore, the Company's hardware appliances are considered non-software elements and are not subject to the industry-specific software revenue recognition guidance. The Company generates revenue through a direct sales force and indirect relationships with its channel partners. For sales to direct end-users and certain channel partners, the Company recognizes product revenue at the time of the title transfer, assuming all other revenue recognition criteria are met. Certain of the Company's distributors that stock its products are granted stock rotation rights as well as rebates for sales of the Company's products. Therefore, the arrangement fee for this group of distributors is not fixed and determinable when products are shipped to these distributors and revenue is deferred until the Company's products are shipped to the distributors’ customer.
	The Company's product revenue also includes revenue from the sale of stand-alone software products. Sales of stand-alone software generally include a perpetual license to our software. Stand-alone software products may operate in conjunction with the Company's hardware products but are not considered essential to the functionality of the hardware.
	For sales of stand-alone software, the Company recognizes revenue based on software revenue recognition guidance. Under the software revenue recognition guidance, the Company uses the residual method to recognize revenue when a product agreement includes one or more elements to be delivered at a future date and VSOE of the fair value of all undelivered elements exists. In the majority of the Company's contracts, the only element that remains undelivered at the time of delivery of the product is PCS. Under the residual method, the fair value of the undelivered elements is deferred and the remaining portion of the contract fee is recognized as product revenue. If evidence of the fair value of one or more undelivered elements does not exist, all revenue is generally deferred and recognized when delivery of those elements occurs or when fair value can be established. When the only undelivered element for which the Company does not have VSOE of selling price is PCS, revenue for the entire arrangement is bundled and recognized ratably over the support period.
	Service Revenue. The Company's service revenue consists of revenue from PCS and software as a service. PCS includes software updates on an “if and when available” basis, expedited replacement for defective access points, controllers or gateways, telephone and internet access to technical support personnel and hardware support. PCS and software as a service are typically sold in one, three or five year terms and the Company recognizes the revenue ratably over the contractual service period.
	Sales Tax and Shipping. Revenue is reported net of sales taxes. Shipping charges billed to channel partners are included in revenue and related costs are included in cost of revenue. To date, shipping charges have not been significant.
Share-based Compensation	Stock-Based Compensation—The Company measures compensation expense for all stock-based payment awards granted to employees, including stock options, restricted stock units (“RSUs”) and purchases under the Company's Employee Stock Purchase Plan (“ESPP”), based on the estimated fair value on the date of the grant. The fair value of each stock option granted is estimated using the Black-Scholes option pricing model. The fair value of each RSU granted represents the closing price of the Company's common stock on the date of grant. The fair value of purchases under the Company’s ESPP is calculated based on the closing price of the Company's common stock on the date of grant and the value of put and call options estimated using the Black-Scholes option pricing model. Stock-based compensation is recognized on a straight-line basis over the requisite service period, net of estimated forfeitures. The forfeiture rate is based on an analysis of the Company’s actual historical forfeitures.
	The Company accounts for stock options issued to nonemployees based on the fair value of the awards determined using the Black-Scholes option pricing model. The fair value of stock options granted to nonemployees is re-measured as the stock options vest, and the resulting change in fair value, if any, is recognized in the Company’s consolidated statement of operations during the period the related services are rendered.
Foreign Currency	Foreign Currency—The functional currency of the Company’s foreign subsidiaries is the U.S. dollar. Monetary assets and liabilities at the foreign subsidiary are re-measured using the current exchange rate at the balance sheet date. Non-monetary assets and liabilities and capital accounts are presented using historical exchange rates. Revenues and expenses are presented using the average exchange rates in effect during the period. Foreign currency re-measurement gains and losses and foreign currency transaction gains and losses have not been material for any periods presented.
Income Tax	Income Taxes—The Company utilizes the asset and liability method of accounting for income taxes. Under this method, deferred tax assets and liabilities are determined based on differences between financial reporting and tax reporting bases of assets and liabilities, and are measured using enacted tax rates and laws that are expected to be in effect when the differences are expected to reverse. The Company records a valuation allowance when necessary to reduce its deferred tax assets to the amount that is more likely than not to be realized. In order for the Company to realize its deferred tax assets, the Company must be able to generate sufficient taxable income in those jurisdictions where the deferred tax assets are located. In determining the need for a valuation allowance, the Company considers future growth, forecasted earnings, future taxable income, the mix of earnings in the jurisdictions in which it operates, historical earnings, taxable income in prior years, if carryback is permitted under the law, carry-forward periods, and prudent and feasible tax planning strategies. In the event the Company were to determine that not all or part of its net deferred tax assets are not more likely than not to be realized in the future, an adjustment to the deferred tax assets valuation allowance would be charged to earnings in the period in which it makes such a determination, or goodwill would be adjusted if the valuation allowance related to deferred tax assets acquired in a business combination and the adjustment is within the measurement period. If the Company later determines that it is more likely than not that the deferred tax assets would be realized, it would reverse the previously provided valuation allowance as an adjustment to earnings at such time.
	The amount of income tax the Company pays is subject to ongoing audits by federal, state and foreign tax authorities, which often result in proposed assessments. The Company records uncertain tax positions in accordance with accounting standards on the basis of a two-step process whereby (1) a determination is made as to whether it is more likely than not that the tax positions will be sustained based on the technical merits of the position and (2) for those tax positions that meet the more-likely-than-not recognition threshold we recognize the largest amount of tax benefit that is more likely than not to be realized upon ultimate settlement with the related tax authority. The Company recognizes interest and penalties related to uncertain tax positions in its provision for income taxes line in the accompanying consolidated statements of operations.
Loss Contingencies	Loss Contingencies—The Company is subject to the possibility of various loss contingencies arising in the ordinary course of business. The Company considers the likelihood of loss or impairment of an asset, or the incurrence of a liability, as well as the Company's ability to reasonably estimate the amount of loss, in determining loss contingencies. An estimated loss contingency is accrued when it is probable that an asset has been impaired or a liability has been incurred and the amount of loss can be reasonably estimated. If the Company determines that a loss is possible and the range of the loss can be reasonably determined, then the Company discloses the range of the possible loss. The Company regularly evaluates available current information available to determine whether an accrual is required, an accrual should be adjusted or a range of possible loss should be disclosed.
Recent Accounting Pronouncements	Recent Accounting Pronouncements—In May 2014, the Financial Accounting Standard Board (“FASB”) and International Accounting Standards Board (“IASB”) issued accounting standards update (“ASU”) 2014-09, Revenue from Contracts with Customers, a converged standard on revenue recognition. Some of the main areas of transition to the new standard include, among others, transfer of control (revenue is recognized when a customer obtains control of a good or service), allocation of transaction price based on relative standalone selling price (entities that sell multiple goods or services in a single arrangement must allocate the consideration to each of those goods or services), contract costs (entities sometimes incur costs, such as sales commissions or mobilization activities, to obtain or fulfill a contract), and disclosures (extensive disclosures are required to provide greater insight into both revenue that has been recognized, and revenue that is expected to be recognized in the future from existing contracts). This accounting standard will be effective for the Company beginning in its first quarter of 2017, with no early adoption permitted, using one of two methods of adoption: (i) retrospective to each prior reporting period presented, with the option to elect certain practical expedients as defined within the standard; or (ii) retrospective with the cumulative effect of initially applying the standard recognized at the date of initial application inclusive of certain additional disclosures. The Company is currently evaluating the impact of this accounting standard update on its consolidated financial position, results of operations and cash flows.

DESCRIPTION_OF_BUSINESS_AND_SU2

DESCRIPTION OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)	12 Months Ended
	Dec. 31, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Percentage of Revenue from Individual Customers	The percentages of revenue from individual customers totaling greater than 10% of total consolidated Company revenue were as follows:
		Years Ended December 31,
		2014		2013			2012
	Distributor A	14.8	%	15.2	%		16.3	%
	Distributor B	12.5	%	12.4	%		*
	Distributor C	10.9	%	*			*
	Distributor D	*		*			12.5	%
	*    Less than 10%
	Each of the Company’s greater than 10% customers are third-party distributors, and in 2013 and 2014, no single value added reseller or end customer accounted for more than 10% of the Company's total consolidated revenue.
	The percentage of receivables from individual customers totaling greater than 10% of total consolidated Company accounts receivable were as follows:
		December 31,
		2014		2013
	Distributor C	12.5	%	10.4	%
	Distributor A	*		11.6	%
	Distributor E	*		11.2	%
	*    Less than 10%
Allowance for doubtful accounts	Activity in the allowance for doubtful accounts was as follows (in thousands):
		Years Ended December 31,
		2014			2013				2012
	Balance at beginning of year	$	400		$	140			$	117
	Charged to expenses	400			911				179
	Write-offs	—			(651		)		(156		)
	Balance at end of year	$	800		$	400			$	140

FAIR_VALUE_DISCLOSURE_Tables

FAIR VALUE DISCLOSURE (Tables)	12 Months Ended
	Dec. 31, 2014
Fair Value Disclosures [Abstract]
Assets measured at fair value	The Company’s assets that were measured at fair value by level within the fair value hierarchy were as follows (in thousands):
		December 31, 2014
		Fair Value		Level 1		Level 2		Level 3
	Assets
	Cash equivalents:
	Money market funds	$	2,771	$	2,771	$	—	$	—
	Corporate debt securities	3,000		—		3,000		—
	Short-term investments:
	Corporate debt securities	118,323		—		118,323		—
	U.S government agency securities	24,383		—		24,383		—
	Total assets measured and recorded at fair value	$	148,477	$	2,771	$	145,706	$	—
		December 31, 2013
		Fair Value		Level 1		Level 2		Level 3
	Assets:
	Cash equivalents:
	Money market funds	$	47,773	$	47,773	$	—	$	—
	Short-term investments:
	Corporate debt securities	60,878		—		60,878		—
	Total assets measured and recorded at fair value	$	108,651	$	47,773	$	60,878	$	—

INVESTMENTS_Tables

INVESTMENTS (Tables)	12 Months Ended
	Dec. 31, 2014
Investments, Debt and Equity Securities [Abstract]
Schedule of available-for-sale investments	Short-term investments consisted of the following (in thousands):
		December 31, 2014
		Amortized Cost		Unrealized Gains			Unrealized Losses			Fair Value
	Corporate debt securities	$	118,470	$	—		$	(147	)	$	118,323
	U.S. government agency securities	24,392		4			(13		)	24,383
	Total short-term investments	$	142,862	$	4		$	(160	)	$	142,706
		December 31, 2013
		Amortized Cost		Unrealized Gains			Unrealized Losses			Fair Value
	Corporate debt securities	$	60,882	$	9		$	(13	)	$	60,878
Schedule of investment maturity	The cost basis and fair value of the short-term investments by contractual maturity consist of the following (in thousands):
		31-Dec-14
		Amortized Cost		Fair Value
	One year or less	$	114,231	$	114,113
	Over one year and less than two years	28,631		28,593
	Total short-term investments	$	142,862	$	142,706
Schedule of available-for-sale investments in unrealized loss position	Investments in an unrealized loss position consisted of the following (in thousands):
		31-Dec-14					31-Dec-13
		Less Than 12 Months
		Fair Value		Unrealized Loss			Fair Value			Unrealized Loss
	Corporate debt securities	$	105,187	$	(147	)	$	18,204		$	(13	)
	U.S. government agency securities	15,773		(13		)	—			—
	Total short-term investments	$	120,960	$	(160	)	$	18,204		$	(13	)

BUSINESS_COMBINATIONS_Tables

BUSINESS COMBINATIONS (Tables)	12 Months Ended
	Dec. 31, 2014
Business Combinations [Abstract]
Purchase price allocation	The purchase allocation for YFind is summarized as follows (in thousands):
		Fair Value
	Cash and cash equivalents	$	257
	Other tangible assets	8
	In-process research and development	6,000
	Goodwill	914
	Non-current deferred tax liabilities	(1,020		)
	Other liabilities assumed	(21		)
	Total purchase consideration	$	6,138

GOODWILL_AND_INTANGIBLES_ASSET1

GOODWILL AND INTANGIBLES ASSETS (Tables)	12 Months Ended
	Dec. 31, 2014
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Goodwill	Goodwill consisted of the following (in thousands):
		Amount
	31-Dec-12	$	9,031
	Goodwill from the acquisition of YFind	914
	31-Dec-13	$	9,945
	Changes in goodwill	—
	31-Dec-14	$	9,945
Schedule intangible assets	Intangible assets consisted of the following (in thousands, except years):
		Gross Carrying		Accumulated			Net		Weighted
		Amount		Amortization			Carrying		Average
							Amount		Remaining
									Life
	31-Dec-14
	Purchased technology	$	12,600	$	(5,249	)	$	7,351	2.8 years
	31-Dec-13
	Purchased technology	$	6,600	$	(2,929	)	$	3,671	2.8 years
	In-process research and development	6,000		—			6,000
	Total	$	12,600	$	(2,929	)	$	9,671
Estimated future amortization of purchased intangible assets	The following table presents the estimated future amortization expense of intangible assets as of December 31, 2014 (in thousands):
	Year ending December 31,	Amount
	2015	$	2,820
	2016	2,531
	2017	1,500
	2018	500
	Total amortization	$	7,351

PROPERTY_AND_EQUIPMENT_Tables

PROPERTY AND EQUIPMENT (Tables)	12 Months Ended
	Dec. 31, 2014
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment [Table Text Block]	Property and equipment consisted of the following (in thousands, except estimated useful lives):
			31-Dec
		Estimated Useful Lives	2014			2013
	Computer hardware	3 years	$	11,167		$	7,451
	Computer software	3 years	4,070			2,396
	Machinery, equipment and tooling	2 to 3 years	10,800			8,718
	Furniture and fixtures	7 years	1,584			1,572
	Leasehold improvements	3 to 10 years	3,911			2,981
	Total property and equipment		31,532			23,118
	Less: accumulated depreciation and amortization		(17,896		)	(11,646		)
	Total property and equipment, net		$	13,636		$	11,472

DEFERRED_REVENUE_Tables

DEFERRED REVENUE (Tables)	12 Months Ended
	Dec. 31, 2014
Deferred Revenue Disclosure [Abstract]
Schedule of deferred revenue	Deferred revenue consisted of the following (in thousands):
		December 31,
		2014		2013
	Product	$	22,900	$	21,732
	Service	26,885		18,505
	Total deferred revenue	$	49,785	$	40,237
	Reported as:
	Current	$	39,231	$	33,139
	Non-current	10,554		7,098
	Total deferred revenue	$	49,785	$	40,237

COMMITMENTS_AND_CONTINGENCIES_

COMMITMENTS AND CONTINGENCIES (Tables)	12 Months Ended
	Dec. 31, 2014
Commitments and Contingencies Disclosure [Abstract]
Schedule of future minimum lease payments under non-cancellable operating leases	Future minimum lease payments under non-cancelable operating leases are as follows (in thousands):
	Years ending December 31,	Amount
	2015	$	3,997
	2016	3,190
	2017	2,789
	2018	2,590
	2019	2,544
	Thereafter	7,489
	Operating lease obligations	$	22,599
Schedule of changes in warranty liability	The warranty liability is included as a component of accrued liabilities in the accompanying consolidated balance sheets. Changes in the warranty liability were as follows (in thousands):
		Years Ended December 31,
		2014			2013			2012
	Balance at beginning of year	$	1,038		$	725		$	489
	Changes in existing warranty	(216		)	(41		)	47
	Warranty expense	955			1,528			784
	Obligations fulfilled	(974		)	(1,174		)	(595		)
	Balance at end of year	$	803		$	1,038		$	725

EQUITY_AWARD_PLAN_Tables

EQUITY AWARD PLAN (Tables)	12 Months Ended
	Dec. 31, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Summary of stock options outstanding	The following table summarizes the outstanding stock option activity (in thousands, except per share amounts and years):
		Options Outstanding
		Number of		Weighted				Weighted		Aggregate
		Shares		Average				Average		Intrinsic
				Exercise Price Per Share				Remaining		Value
								Contractual Life (Years)
	Balance, December 31, 2013	19,609		$	4.51			7.3		$	195,142
	Options granted	1,585		13
	Options exercised	-3,618		2.11
	Options forfeited	-534		10.94
	Balance, December 31, 2014	17,042		$	5.6			6.7		$	119,782
	Options exercisable as of December 31, 2014	11,278		$	3.74			6		$	97,008
	Options vested and expected to vest as of December 31, 2014	16,853		$	5.54			6.7		$	119,331
Summary of restricted stock units outstanding	The following table summarizes the outstanding activity of RSUs (in thousands, except per share amounts and years):
		RSUs Outstanding
		Number of Shares			Weighted				Weighted		Aggregate
					Average				Average		Intrinsic
					Grant Date Fair Value				Remaining		Value
					Per Share				Contractual Life (Years)
	Balance, December 31, 2013	1,011			$	17.11			1.6		$	14,356
	RSUs granted	2,289			12.7
	RSUs vested	(319	)		17.53
	RSUs forfeited	(156	)		14.27
	Balance, December 31, 2014	2,825			$	13.65			1.7		$	33,955
Summary of stock activity and number of shares available for grant	The following table summarizes the stock activity and the total number of shares available for grant under the 2012 Plan as of December 31, 2014 (in thousands):
		Number of
		Shares
	Balance, December 31, 2013	8,547
	Additional shares reserved for issuance	4,035
	Options granted	(1,585	)
	Options forfeited	534
	RSUs granted	(2,289	)
	RSUs forfeited	156
	Balance, December 31, 2014	9,398
Summary of stock options, valuation assumptions	The following table summarizes the weighted average assumptions relating to the Company’s stock options:
		Years Ended December 31,
		2014			2013			2012
	Volatility	60.7	%		67.4	%		69.1	%
	Expected term (years)	6.1			6.1			6
	Risk-free interest rate	1.9	%		1.9	%		1	%
	Dividend yield	—			—			—
Summary of Employee Stock Purchase Plan, valuation assumptions	The following table summarizes the weighted average assumptions relating to the Company’s ESPP:
		Years Ended December 31,
		2014			2013
	Volatility	40.2	%		59.6	%
	Expected term (years)	0.7			0.7
	Risk-free interest rate	0.1	%		0.1	%
	Dividend yield	—			—
Schedule of allocation of stock-based compensation expense	The following table summarizes the stock-based compensation expense recorded for stock awards issued to employees and non-employees (in thousands):
		Years Ended December 31,
		2014				2013				2012
	Cost of revenue	$	1,092			$	818			$	243
	Research and development	9,099				6,738				2,409
	Sales and marketing	7,180				4,922				1,787
	General and administrative	9,223				6,637				4,012
	Total stock-based compensation	26,594				19,115				8,451
	Tax benefit from stock-based compensation	(688		)		(1,535		)		(2,417		)
	Total stock-based compensation, net of tax effect	$	25,906			$	17,580			$	6,034

EARNINGS_PER_SHARE_Tables

EARNINGS PER SHARE (Tables)	12 Months Ended
	Dec. 31, 2014
Earnings Per Share [Abstract]
Schedule of calculation of basic and diluted net income (loss) per share
		Years Ended December 31,
		2014			2013			2012
	Numerator:
	Net income	$	8,190		$	1,789		$	31,704
	Less: Undistributed earnings allocated to participating securities	—			—			(22,668		)
	Net income attributable to common stockholders, basic and diluted	$	8,190		$	1,789		$	9,036
	Denominator:
	Weighted-average shares used in computing basic net income per share attributable to common stockholders	82,908			76,744			24,847
	Weighted-average effect of potentially dilutive shares:
	Employee stock options	10,538			16,442			12,788
	RSUs and ESPP	222			175			140
	Diluted	93,668			93,361			37,775
	Net income per share attributable to common stockholders:
	Basic	$	0.1		$	0.02		$	0.36
	Diluted	$	0.09		$	0.02		$	0.24
Summary of the outstanding redeemable convertible preferred stock, employee stock, employee stock options, RSUs and warrants excluded from the diluted per share calculation	The following table summarizes the weighted average outstanding stock awards that were excluded from the diluted per share calculation because to include them would have been anti-dilutive for the period (in thousands):
		Years Ended December 31,
		2014		2013			2012
	Stock options	2,649		1,134			3,348
	RSUs and ESPP	977		233			—
	Total	3,626		1,367			3,348

INCOME_TAXES_Tables

INCOME TAXES (Tables)	12 Months Ended
	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Schedule of domestic and foreign components of income (loss) before provision for income taxes	The domestic and foreign components of income (loss) before the provision for income taxes for the years ended December 31, 2014, 2013 and 2012 were as follows (in thousands):
		Years Ended December 31,
		2014			2013			2012
	Domestic	$	13,107		$	(1,015	)	$	13,235
	Foreign	1,023			905			1,231
	Total	$	14,130		$	(110	)	$	14,466
Schedule of provision (benefit) for income taxes	During the years ended December 31, 2014, 2013 and 2012, the Company’s income tax expense (benefit) was as follows (in thousands):
		Years Ended December 31,
		2014			2013			2012
	Current expense:
	Federal	$	8,224		$	1,880		$	—
	State	999			143			317
	Foreign	1,257			1,006			762
	Total current expense	10,480			3,029			1,079
	Deferred benefit:
	Federal	(2,936		)	(3,445		)	(13,805		)
	State	(1,259		)	(1,172		)	(4,467		)
	Foreign	(345		)	(311		)	(45		)
	Total deferred benefit	(4,540		)	(4,928		)	(18,317		)
	Total income tax expense (benefit)	$	5,940		$	(1,899	)	$	(17,238	)
Schedule of effective income tax rate reconciliation	The difference between the income tax expense (benefit) and the amount computed by applying the statutory federal income tax rate to the income (loss) before income taxes is as follows (in thousands):
		Years Ended December 31,
		2014			2013			2012
	Federal statutory rate	$	4,945		$	(38	)	$	4,918
	State taxes, net of federal income tax benefit	602			86			417
	Non-deductible expenses	246			209			134
	Stock-based compensation	2,209			1,535			701
	Preferred stock warrant liability	—			—			966
	Acquisition cost	—			110			—
	Foreign tax deduction	(153		)	(101		)	—
	Tax credits	(2,502		)	(4,020		)	(884		)
	Foreign tax rate differential	393			324			273
	Other items not individually material	200			(4		)	116
	Change in statutory rate	—			—			(262		)
	Change in valuation allowance	—			—			(23,617		)
	Total income tax expense (benefit)	$	5,940		$	(1,899	)	$	(17,238	)
Schedule of components of deferred tax assets and liabilities	Significant components of the Company’s deferred tax assets and liabilities are as follows (in thousands):
		As of December 31,
		2014			2013
	Deferred tax assets:
	Accruals and reserves	$	2,645		$	1,641
	Tax credits	4,416			6,719
	Fixed assets and intangibles, other than goodwill	3,913			3,402
	Net operating losses	1,426			1,645
	Stock-based compensation	11,023			7,131
	Deferred revenue	2,560			1,448
	Other	2,177			1,517
	Total deferred tax assets	28,160			23,503
	Deferred tax liabilities
	Intangible assets	(850		)	(1,020		)
	Goodwill	(535		)	(305		)
	Net deferred tax assets	$	26,775		$	22,178
	As reported:
	Current deferred tax asset	$	6,205		$	7,715
	Non-current deferred tax assets	21,166			15,317
	Non-current deferred tax liabilities	(596		)	(854		)
	Net deferred tax assets	$	26,775		$	22,178
Schedule of unrecognized tax benefits roll forward	A reconciliation of the beginning and ending balances of the total amounts of unrecognized tax benefits for the years ended December 31, 2014, 2013 and 2012 is as follows (in thousands):
		As of December 31,
		2014			2013			2012
	Balance at beginning of year	$	2,397		$	836		$	937
	Additions related to current year tax positions	858			1,394			218
	Additions related to prior year tax positions	—			167			—
	Reductions related to prior year tax positions	(3		)	—			(319		)
	Balance at end of year	$	3,252		$	2,397		$	836

SEGMENT_INFORMATION_Tables

SEGMENT INFORMATION (Tables)	12 Months Ended
	Dec. 31, 2014
Segment Reporting [Abstract]
Schedule of total revenue by geographic region	The following presents total revenue by geographic region (in thousands):
		Years Ended December 31,
		2014		2013		2012
	Americas:
	United States	$	159,548	$	118,333	$	91,597
	Other Americas	9,670		12,604		5,135
	Total Americas	169,218		130,937		96,732
	EMEA:
	United Kingdom	24,715		28,129		20,862
	Other EMEA	59,351		43,884		28,429
	Total EMEA	84,066		72,013		49,291
	APAC:
	Japan	13,935		17,069		27,462
	Other APAC	59,700		43,048		41,168
	Total APAC	73,635		60,117		68,630
	Total revenue	$	326,919	$	263,067	$	214,653

DESCRIPTION_OF_BUSINESS_AND_SU3

DESCRIPTION OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Concentration of Credit Risk and Significant Customers) (Details)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Revenues | Distributor A
Revenue, Major Customer
Significant customer, as a percentage	14.80%	15.20%	16.30%
Revenues | Distributor B
Revenue, Major Customer
Significant customer, as a percentage	12.50%	12.40%
Revenues | Distributor C
Revenue, Major Customer
Significant customer, as a percentage	10.90%
Revenues | Distributor D
Revenue, Major Customer
Significant customer, as a percentage			12.50%
Accounts Receivables | Distributor A
Revenue, Major Customer
Significant customer, as a percentage		11.60%
Accounts Receivables | Distributor C
Revenue, Major Customer
Significant customer, as a percentage	12.50%	10.40%
Accounts Receivables | Distributor E
Revenue, Major Customer
Significant customer, as a percentage		11.20%

DESCRIPTION_OF_BUSINESS_AND_SU4

DESCRIPTION OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Allowance for Doubtful Accounts) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Allowance for Doubtful Accounts Receivable [Roll Forward]
Balance at beginning of the year	$400	$140	$117
Provision for doubtful accounts	400	911	179
Write-offs	0	-651	-156
Balance at end of the year	$800	$400	$140

DESCRIPTION_OF_BUSINESS_AND_SU5

DESCRIPTION OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Additional Information) (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Accounting Policies [Abstract]
Restricted cash	$5,000	$5,000

FAIR_VALUE_DISCLOSURE_Details

FAIR VALUE DISCLOSURE (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Total assets measured and recorded at fair value	$148,477	$108,651
US Government Agencies Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Short-term investments, at fair value	24,383
Corporate debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Short-term investments, at fair value	118,323	60,878
Money Market Funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Cash equivalents, at fair value	2,771	47,773
Corporate debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Cash equivalents, at fair value	3,000
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Total assets measured and recorded at fair value	2,771	47,773
Level 1 | US Government Agencies Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Short-term investments, at fair value	0
Level 1 | Corporate debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Short-term investments, at fair value	0	0
Level 1 | Money Market Funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Cash equivalents, at fair value	2,771	47,773
Level 1 | Corporate debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Cash equivalents, at fair value	0
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Total assets measured and recorded at fair value	145,706	60,878
Level 2 | US Government Agencies Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Short-term investments, at fair value	24,383
Level 2 | Corporate debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Short-term investments, at fair value	118,323	60,878
Level 2 | Money Market Funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Cash equivalents, at fair value	0	0
Level 2 | Corporate debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Cash equivalents, at fair value	3,000
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Total assets measured and recorded at fair value	0	0
Level 3 | US Government Agencies Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Short-term investments, at fair value	0
Level 3 | Corporate debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Short-term investments, at fair value	0	0
Level 3 | Money Market Funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Cash equivalents, at fair value	0	0
Level 3 | Corporate debt securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Cash equivalents, at fair value	$0

INVESTMENTS_Details

INVESTMENTS (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Schedule of Available-for-sale Securities
Amortized Cost	$142,862
Unrealized Gains	4
Unrealized Losses	-160
Fair Value	142,706
Corporate debt securities
Schedule of Available-for-sale Securities
Amortized Cost	118,470	60,882
Unrealized Gains	0	9
Unrealized Losses	-147	-13
Fair Value	118,323	60,878
US Government Agencies Debt Securities [Member]
Schedule of Available-for-sale Securities
Amortized Cost	24,392
Unrealized Gains	4
Unrealized Losses	-13
Fair Value	$24,383

INVESTMENTS_Continuous_Unreali

INVESTMENTS (Continuous Unrealized Losses) (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Schedule of Available-for-sale Securities
Less than 12 months, Fair Value	$120,960	$18,204
Less than 12 months, Unrealized Loss	-160	-13
Corporate debt securities
Schedule of Available-for-sale Securities
Less than 12 months, Fair Value	105,187	18,204
Less than 12 months, Unrealized Loss	-147	-13
US Government Agencies Debt Securities [Member]
Schedule of Available-for-sale Securities
Less than 12 months, Fair Value	15,773	0
Less than 12 months, Unrealized Loss	($13)	$0

INVESTMENTS_Investment_Maturit

INVESTMENTS (Investment Maturities) (Details) (USD $)	Dec. 31, 2014
In Thousands, unless otherwise specified
Investments, Debt and Equity Securities [Abstract]
Amortized cost, one year or less	$114,231
Amortized cost, over one year and less than two years	28,631
Amortized Cost	142,862
Fair value, one year or less	114,113
Fair value, over one year and less than two years	28,593
Fair Value	$142,706

BUSINESS_COMBINATIONS_Details

BUSINESS COMBINATIONS (Details) (USD $)	0 Months Ended	12 Months Ended
	Jul. 18, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Purchase Allocation
Goodwill		$9,945,000	$9,945,000	$9,031,000
YFind
Business Acquisition [Line Items]
Purchase consideration paid in cash	6,138,000
Options granted (in shares)	51,900
Payment period for retention bonuses	2 years
Compensation costs related to acquisition		1,100,000	1,000,000
Purchase Allocation
Cash and cash equivalents	257,000
Other tangible assets	8,000
In-process research and development	6,000,000
Goodwill	914,000
Noncurrent deferred tax liabilities	-1,020,000
Other liabilities assumed	-21,000
Total purchase consideration	$6,138,000
YFind | Minimum
Business Acquisition [Line Items]
Vesting period for equity awards	3 years
YFind | Maximum
Business Acquisition [Line Items]
Vesting period for equity awards	4 years
YFind | RSU
Business Acquisition [Line Items]
Awards granted (in shares)	219,782

GOODWILL_AND_INTANGIBLES_ASSET2

GOODWILL AND INTANGIBLES ASSETS (Goodwill) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Goodwill [Roll Forward]
Goodwill, beginning	$9,945	$9,031
Goodwill from the acquisition of YFind		914
Changes in goodwill	0
Goodwill, ending	$9,945	$9,945

GOODWILL_AND_INTANGIBLES_ASSET3

GOODWILL AND INTANGIBLES ASSETS (Intangible Assets) (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Jul. 18, 2013
Schedule of Intangible Assets [Line Items]
Accumulated amortization		($2,929,000)
Finite-lived intangible assets, net	7,351,000
Intangible Assets, Gross		12,600,000
Intangible assets, net	7,351,000	9,671,000
In-process research and development
Schedule of Intangible Assets [Line Items]
Indefinite-lived intangible assets		6,000,000
In-process research and development | YFind
Schedule of Intangible Assets [Line Items]
Indefinite-lived intangible assets				6,000,000
Purchased technology
Schedule of Intangible Assets [Line Items]
Gross Carrying Amount	12,600,000	6,600,000
Accumulated amortization	-5,249,000	-2,929,000
Finite-lived intangible assets, net	7,351,000	3,671,000
Weighted average remaining useful life	2 years 10 months	2 years 10 months
Amortization of Intangible Assets	$2,300,000	$1,300,000	$1,300,000

GOODWILL_AND_INTANGIBLES_ASSET4

GOODWILL AND INTANGIBLES ASSETS (Future Amortization Expense) (Details) (USD $)	Dec. 31, 2014
In Thousands, unless otherwise specified
Estimated Future Amortization Expense By Fiscal Year Maturity
2015	$2,820
2016	2,531
2017	1,500
2018	500
Finite-lived intangible assets, net	$7,351

PROPERTY_AND_EQUIPMENT_Details

PROPERTY AND EQUIPMENT (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Property and Equipment
Property and equipment, gross	$31,532	$23,118
Less: accumulated depreciation and amortization	-17,896	-11,646
Property and equipment, net	13,636	11,472
Computer hardware
Property and Equipment
Property and equipment, gross	11,167	7,451
Computer software
Property and Equipment
Property and equipment, gross	4,070	2,396
Machinery, equipment and tooling
Property and Equipment
Property and equipment, gross	10,800	8,718
Furniture and fixtures
Property and Equipment
Property and equipment, gross	1,584	1,572
Leasehold improvements
Property and Equipment
Property and equipment, gross	$3,911	$2,981

PROPERTY_AND_EQUIPMENT_Useful_

PROPERTY AND EQUIPMENT (Useful Lives and Depreciation) (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Property and Equipment
Depreciation and amortization of property and equipment	$7.30	$5.30	$3.50
Computer hardware
Property and Equipment
Estimated useful lives	3 years
Computer software
Property and Equipment
Estimated useful lives	3 years
Machinery, equipment and tooling | Minimum
Property and Equipment
Estimated useful lives	2 years
Machinery, equipment and tooling | Maximum
Property and Equipment
Estimated useful lives	3 years
Furniture and fixtures
Property and Equipment
Estimated useful lives	7 years
Leasehold improvements | Minimum
Property and Equipment
Estimated useful lives	3 years
Leasehold improvements | Maximum
Property and Equipment
Estimated useful lives	10 years

DEFERRED_REVENUE_Details

DEFERRED REVENUE (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Deferred Revenue Arrangement [Line Items]
Deferred revenue	49,785	$40,237
Current	39,231	33,139
Noncurrent	10,554	7,098
Product
Deferred Revenue Arrangement [Line Items]
Deferred revenue	22,900	21,732
Services
Deferred Revenue Arrangement [Line Items]
Deferred revenue	26,885	$18,505
Services | Minimum
Deferred Revenue Arrangement [Line Items]
Typical service support period, minimum	1 year
Services | Maximum
Deferred Revenue Arrangement [Line Items]
Typical service support period, minimum	5 years

COMMITMENTS_AND_CONTINGENCIES_1

COMMITMENTS AND CONTINGENCIES (Operating Leases, Purchase Commitments, and Litigation) (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Commitments and Contingencies Disclosure [Abstract]
Operating Leases, Rent Expense	$4,700,000	$4,400,000	$2,900,000
Operating Leases, Future Minimum Payments [Abstract]
2015	3,997,000
2016	3,190,000
2017	2,789,000
2018	2,590,000
2019	2,544,000
Thereafter	7,489,000
Operating lease obligation	22,599,000
Gain on settlement of several patent litigation claims	800,000
Current purchase commitments	$15,200,000

COMMITMENTS_AND_CONTINGENCIES_2

COMMITMENTS AND CONTINGENCIES (Product Liabilities) (Details) (USD $)	12 Months Ended			1 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Apr. 30, 2013
Product Liability
Restricted cash for indemnification agreement	$5,000	$5,000
Movement in Standard and Extended Product Warranty, Increase (Decrease) [Roll Forward]
Beginning warranty liability	1,038	725	489
Changes in existing warranty	-216	-41	47
Warranty expense	955	1,528	784
Obligations fulfilled	-974	-1,174	-595
Ending warranty liability	$803	$1,038	$725
Hardware other than Indoor WLAN Products
Product Liability
Standard product warranty term	1 year
Indemnification Agreement
Product Liability
Indemnification Period				6 years

EQUITY_AWARD_PLAN_Stock_Option

EQUITY AWARD PLAN (Stock Option Activity) (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award
Number of equity incentive plans	2
Stock Options
Number of Shares
Beginning balance (shares)	19,609,000
Options granted (shares)	1,585,000
Options exercised (shares)	-3,618,000
Options forfeited (shares)	-534,000
Ending balance (shares)	17,042,000	19,609,000
Options exercisable (shares)	11,278,000
Options vested and expected to vest (shares)	16,853,000
Weighted Average Exercise Price
Options outstanding (in dollars per share)	$5.60	$4.51
Options granted (in dollars per share)	$13
Options exercised (in dollars per share)	$2.11
Options forfeited (in dollars per share)	$10.94
Options exercisable (in dollars per share)	$3.74
Options vested and expected to vest (in dollars per share)	$5.54
Weighted Average Remaining Contractual Life
Weighted Average Remaining Contractual Life	6 years 8 months 16 days	7 years 3 months 20 days
Options exercisable	6 years
Options vested and expected to vest	6 years 7 months 39 days
Aggregate Intrinsic Value
Aggregate Intrinsic Value	$119,782,000	$195,142,000
Options exercisable	97,008,000
Options vested and expected to vest	119,331,000
Weighted average grant date fair value (in dollars per share)	$7.42	$10.33	$3.91
Total intrinsic value of options exercised	$39,000,000	$74,100,000	$4,800,000

EQUITY_AWARD_PLAN_Restricted_S

EQUITY AWARD PLAN (Restricted Stock Units Activity) (Details) (RSU, USD $)	12 Months Ended
Share data in Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
RSU
Number of Shares
Beginning balance (shares)	1,011
RSUs granted (shares)	2,289
RSUs exercised (shares)	-319
RSUs forfeited (shares)	-156
Ending balance (shares)	2,825	1,011
Weighted-Average Grant- Date Fair Value Per Share
RSUs outstanding (in dollars per share)	$13.65	$17.11
RSUs granted (in dollars per share)	$12.70	$17.10
RSUs vested (in dollars per share)	$17.53
RSUs forfeited (in dollars per share)	$14.27
RSU, Weighted Average Remaining Contractual Life	1 year 8 months 12 days	1 year 7 months 7 days
Aggregate Intrinsic Value
Aggregate Intrinsic Value	$33,955,000	$14,356,000
Fair value of RSUs vested	$4,200,000

EQUITY_AWARD_PLAN_Stock_Activi

EQUITY AWARD PLAN (Stock Activity and Number of Shares Available for Grant) (Details)	12 Months Ended
	Dec. 31, 2014
Shares Available for Grant
Beginning balance (shares)	8,547,000
Additional shares reserved for issuance (shares)	4,035,000
Ending balance (shares)	9,398,000
Stock Options
Shares Available for Grant
Options granted (shares)	-1,585,000
Options forfeited (shares)	534,000
RSU
Shares Available for Grant
RSUs granted (shares)	-2,289,000
RSUs forfeited (shares)	156,000

EQUITY_AWARD_PLAN_Assumptions_

EQUITY AWARD PLAN (Assumptions) (Details)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award
Volatility	60.70%	67.40%	69.10%
Expected term (years)	6 years 0 months 28 days		6 years 0 months 2 days
Risk-free interest rate	1.90%		1.00%
Dividend yield	0.00%	0.00%	0.00%
ESPP
Share-based Compensation Arrangement by Share-based Payment Award
Volatility	40.20%	59.60%
Expected term (years)	8 months 12 days	8 months 12 days
Risk-free interest rate	0.10%	0.10%
Dividend yield	0.00%	0.00%

EQUITY_AWARD_PLAN_Stockbased_C

EQUITY AWARD PLAN (Stock-based Compensation Expense) (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Employee Service Share-based Compensation, Allocation of Recognized Period Costs
Total stock-based compensation	$26,594,000	$19,115,000	$8,451,000
Tax benefit from stock-based compensation	-688,000	-1,535,000	-2,417,000
Total stock-based compensation, net of tax effect	25,906,000	17,580,000	6,034,000
Compensation cost not yet recognized	64,300,000
Compensation cost not yet recognized, period for recognition	2 years 2 months 13 days
Cost of revenue
Employee Service Share-based Compensation, Allocation of Recognized Period Costs
Total stock-based compensation	1,092,000	818,000	243,000
Research and development
Employee Service Share-based Compensation, Allocation of Recognized Period Costs
Total stock-based compensation	9,099,000	6,738,000	2,409,000
Sales and marketing
Employee Service Share-based Compensation, Allocation of Recognized Period Costs
Total stock-based compensation	7,180,000	4,922,000	1,787,000
General and administrative
Employee Service Share-based Compensation, Allocation of Recognized Period Costs
Total stock-based compensation	9,223,000	6,637,000	4,012,000
YFind Employee Stock Compensation Plan [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs
Stock-based compensation related to the cash settlement of equity awards		$400,000

EQUITY_AWARD_PLAN_Additional_I

EQUITY AWARD PLAN (Additional Information) (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Nov. 16, 2012
	plan
Share-based Compensation Arrangement by Share-based Payment Award
Number of equity incentive plans	2
2012 Plan
Share-based Compensation Arrangement by Share-based Payment Award
Expiration period	10 years
Number of shares authorized under plan	32,000,000
Increase in number of shares reserved for issuance on the first day of fiscal year, as a percentage of shares of common stock on the last day of preceding fiscal year	5.00%
Shares reserved for future issuance	29,300,000	29,200,000
2012 Plan | Minimum
Share-based Compensation Arrangement by Share-based Payment Award
Vesting period for equity awards	1 year
2012 Plan | Maximum
Share-based Compensation Arrangement by Share-based Payment Award
Vesting period for equity awards	4 years
ESPP
Share-based Compensation Arrangement by Share-based Payment Award
Number of shares authorized under plan	3,800,000	2,600,000
Shares reserved for future issuance			1,500,000
Offering period	1 year
Purchase period	6 months
Maximum percent of employee salary that can purchase stock	15.00%
Purchase price of common stock, as a percent	85.00%
Maximum value of stock purchased per employee	25,000
Maximum number of shares purchased by each employee	2,000
Average exercise price	8.91
ESPP | Scenario (i) ESPP shares reserved for issuance
Share-based Compensation Arrangement by Share-based Payment Award
Increase in number of shares reserved for issuance on the first day of fiscal year, as a percentage of shares of common stock on the last day of preceding fiscal year	2.00%
ESPP | Scenario (ii) ESPP shares reserved for issuance
Share-based Compensation Arrangement by Share-based Payment Award
Shares reserved for future issuance	3,000,000
Common Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award
Stock Issued During Period, Shares, Employee Stock Purchase Plans	482,000	345,000

EARNINGS_PER_SHARE_Calculation

EARNINGS PER SHARE (Calculation of Basic and Diluted Net Income Per Share) (Details) (USD $)	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Numerator:
Net income	$8,190	$1,789	$31,704
Undistributed Earnings, Diluted			-22,668
Net Income (Loss) Available to Common Stockholders, Basic and Diluted	$8,190	$1,789	$9,036
Denominator:
Basic (in shares)	82,908	76,744	24,847
Weighted-average effect of potentially dilutive shares:
Employee stock options	10,538	16,442	12,788
RSUs and ESPP	222	175	140
Diluted (in shares)	93,668	93,361	37,775
Net income per share of common stock:
Basic (USD per share)	$0.10	$0.02	$0.36
Diluted (USD per share)	$0.09	$0.02	$0.24

EARNINGS_PER_SHARE_Antidilutiv

EARNINGS PER SHARE (Antidilutive Securities) (Details)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Antidilutive Securities Excluded from Computation of Earnings Per Share
Shares excluded from the diluted per share calculation	3,626	1,367	3,348
Stock Options
Antidilutive Securities Excluded from Computation of Earnings Per Share
Shares excluded from the diluted per share calculation	2,649	1,134	3,348
RSUs and ESPP
Antidilutive Securities Excluded from Computation of Earnings Per Share
Shares excluded from the diluted per share calculation	977	233	0

INCOME_TAXES_Domestic_and_Fore

INCOME TAXES (Domestic and Foreign Components of Income (Loss)) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Domestic and Foreign Components of Income (Loss) Before Provision for Income Taxes
Domestic	$13,107	($1,015)	$13,235
Foreign	1,023	905	1,231
Total	$14,130	($110)	$14,466

INCOME_TAXES_Provision_Benefit

INCOME TAXES (Provision (Benefit) for Income Taxes) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Current expense:
Federal	$8,224	$1,880	$0
State	999	143	317
Foreign	1,257	1,006	762
Total current expense	10,480	3,029	1,079
Deferred (benefit) expense:
Federal	-2,936	-3,445	-13,805
State	-1,259	-1,172	-4,467
Foreign	-345	-311	-45
Total deferred (benefit) expense	-4,540	-4,928	-18,317
Total income tax expense (benefit)	$5,940	($1,899)	($17,238)

INCOME_TAXES_Effective_Income_

INCOME TAXES (Effective Income Tax Rate Reconciliation) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Tax Disclosure [Abstract]
Federal statutory rate	$4,945	($38)	$4,918
State taxes, net of federal income tax benefit	602	86	417
Non-deductible expenses	246	209	134
Stock-based compensation	2,209	1,535	701
Preferred stock warrant liability	0	0	966
Acquisition cost	0	110	0
Foreign tax deduction	-153	-101	0
Tax credits	-2,502	-4,020	-884
Foreign tax rate differential	393	324	273
Other items not individually material	200	-4	116
Change in statutory rate	0	0	-262
Change in valuation allowance	0	0	-23,617
Total income tax expense (benefit)	$5,940	($1,899)	($17,238)

INCOME_TAXES_Components_of_Def

INCOME TAXES (Components of Deferred Tax Assets and Liabilities) (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Deferred tax assets:
Accruals and reserves	$2,645	$1,641
Tax credits	4,416	6,719
Fixed assets and intangibles, other than goodwill	3,913	3,402
Net operating losses	1,426	1,645
Stock-based compensation	11,023	7,131
Deferred revenue	2,560	1,448
Other	2,177	1,517
Total deferred tax assets	28,160	23,503
Deferred tax liabilities
Intangible other than goodwill	-850	-1,020
Goodwill	-535	-305
Net deferred tax assets	26,775	22,178
As reported:
Current deferred tax asset	6,205	7,715
Non-current deferred tax assets	21,166	15,317
Non-current deferred tax liabilities	-596	-854
Net deferred tax assets	$26,775	$22,178

INCOME_TAXES_Operating_Loss_Ca

INCOME TAXES (Operating Loss Carryforwards) (Details) (USD $)	Dec. 31, 2014
In Millions, unless otherwise specified
Federal
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	$39.50
Federal | Additional Paid-in Capital [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	39.4
State
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	50.1
State | Additional Paid-in Capital [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	29.9
Foreign
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	3.8
Foreign | Additional Paid-in Capital [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	$2.30

INCOME_TAXES_Tax_Credit_Carryf

INCOME TAXES (Tax Credit Carryforwards and Income Tax Uncertainties) (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Tax Credit Carryforward [Line Items]
Unrecognized tax benefits	$3,252,000	$2,397,000	$836,000	$937,000
Unrecognized tax benefits that would impact effective tax rate	2,700,000
Federal | Research Tax Credit Carryforward
Tax Credit Carryforward [Line Items]
Tax credit carryforwards	7,900,000
State | Research Tax Credit Carryforward
Tax Credit Carryforward [Line Items]
Tax credit carryforwards	8,300,000
State | Research Tax Credit Carryforward | Stock Option Deductions In Excess Of Book Expense
Tax Credit Carryforward [Line Items]
Tax credit carryforwards	3,900,000
Foreign
Tax Credit Carryforward [Line Items]
Tax credit carryforwards	$500,000

INCOME_TAXES_Unrecognized_Tax_

INCOME TAXES (Unrecognized Tax Benefits Roll Forward) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Tax Disclosure [Abstract]
Balance at beginning of year	$2,397	$836	$937
Increases related to current year tax positions	858	1,394	218
Increases related to prior year tax positions	0	167	0
Reductions related to prior year tax positions	-3	0	-319
Balance at end of year	$3,252	$2,397	$836

EMPLOYEE_SAVINGS_AND_RETIREMEN1

EMPLOYEE SAVINGS AND RETIREMENT PLAN (Details)	12 Months Ended
	Dec. 31, 2014
Compensation and Retirement Disclosure [Abstract]
Maximum Annual Contribution per Employee	100.00%

SEGMENT_INFORMATION_Details

SEGMENT INFORMATION (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
	segment
Segment Reporting [Abstract]
Number of industry segments	1
Revenues from External Customers and Long-Lived Assets
Revenue	$326,919	$263,067	$214,653
Americas
Revenues from External Customers and Long-Lived Assets
Revenue	169,218	130,937	96,732
United States
Revenues from External Customers and Long-Lived Assets
Revenue	159,548	118,333	91,597
Other Americas
Revenues from External Customers and Long-Lived Assets
Revenue	9,670	12,604	5,135
EMEA
Revenues from External Customers and Long-Lived Assets
Revenue	84,066	72,013	49,291
United Kingdom
Revenues from External Customers and Long-Lived Assets
Revenue	24,715	28,129	20,862
Other EMEA
Revenues from External Customers and Long-Lived Assets
Revenue	59,351	43,884	28,429
JAPAN
Revenues from External Customers and Long-Lived Assets
Revenue	13,935	17,069	27,462
Other Asia Pacific [Member]
Revenues from External Customers and Long-Lived Assets
Revenue	59,700	43,048	41,168
APAC
Revenues from External Customers and Long-Lived Assets
Revenue	$73,635	$60,117	$68,630

SEGMENT_INFORMATION_Property_P

SEGMENT INFORMATION (Property, Plant, and Equipment by Geographic Region) (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Segment Reporting Information
Property and equipment, net	$13,636	$11,472
Americas
Segment Reporting Information
Property and equipment, net	8,900
EMEA
Segment Reporting Information
Property and equipment, net	600
APAC
Segment Reporting Information
Property and equipment, net	$4,100