Callidus Software (CALD) 10-K 2 Mar 15 2014 FY Annual report Financial data

Document_and_Entity_Informatio

Document and Entity Information (USD $)	12 Months Ended
In Millions, except Share data, unless otherwise specified	Dec. 31, 2014	Feb. 17, 2015	Jun. 30, 2014
Document and Entity Information
Entity Registrant Name	CALLIDUS SOFTWARE INC
Entity Central Index Key	1035748
Document Type	10-K
Document Period End Date	31-Dec-14
Amendment Flag	FALSE
Current Fiscal Year End Date	-19
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Accelerated Filer
Entity Public Float			$564
Entity Common Stock, Shares Outstanding		49,075,288
Document Fiscal Year Focus	2014
Document Fiscal Period Focus	FY

CONSOLIDATED_BALANCE_SHEETS

CONSOLIDATED BALANCE SHEETS (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Current assets:
Cash and cash equivalents	$34,200	$28,295
Short-term investments	2,766	7,866
Accounts receivable, net of allowances	41,623	29,216
Prepaid and other current assets	10,384	6,232
Total current assets	88,973	71,609
Property and equipment, net	18,755	11,351
Goodwill	46,970	31,207
Intangible assets, net	17,757	16,995
Deferred income taxes, noncurrent	440	405
Deposits and other assets	3,403	2,626
Total assets	176,298	134,193
Current liabilities:
Accounts payable	2,056	2,987
Accrued payroll and related expenses	9,051	7,377
Accrued expenses	16,868	5,395
Deferred income taxes	1,475	1,159
Deferred revenue	61,427	46,222
Capital lease obligations	1,001	1,308
Total current liabilities	91,878	64,448
Deferred revenue, noncurrent	10,195	10,432
Deferred income taxes, noncurrent	561	155
Other liabilities	4,709	1,921
Capital lease obligations, noncurrent	0	987
Convertible notes	0	14,197
Long-term Line of Credit, Noncurrent	10,481	0
Total liabilities	117,824	92,140
Commitments and contingencies
Stockholders' equity:
Common stock	49	45
Additional paid-in capital	344,312	315,430
Treasury stock	-14,430	-14,430
Accumulated other comprehensive income	-739	165
Accumulated deficit	-270,718	-259,157
Total stockholders' equity	58,474	42,053
Total liabilities and stockholders' equity	$176,298	$134,193

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]
Accounts receivable, allowances (in dollars)	$1,063	$650
Preferred stock, par value (in dollars per share)	$0.00	$0.00
Preferred stock, shares authorized	5,000,000	5,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value (in dollars per share)	$0.00	$0.00
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	51,285,000	47,817,000
Common stock, shares outstanding	48,946,000	45,478,000
Treasury stock, shares	2,339,000	2,339,000

CONSOLIDATED_STATEMENTS_OF_COM

CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS (USD $)	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Revenues:
Recurring	$99,807	$81,734	$70,919
Services and other	36,811	30,603	24,033
Total revenues	136,618	112,337	94,952
Cost of revenues:
Recurring	31,282	28,741	30,039
Services and other	24,756	19,048	20,301
Total cost of revenues	56,038	47,789	50,340
Gross profit	80,580	64,548	44,612
Operating expenses:
Sales and marketing	47,040	34,916	32,442
Research and development	20,307	17,143	16,643
General and administrative	26,255	22,951	19,953
Income from settlement and patent licensing	-500	-500	0
Acquisition-related contingent consideration	0	0	-1,612
Restructuring	1,025	1,699	1,115
Total operating expenses	94,127	76,209	68,541
Operating loss	-13,547	-11,661	-23,929
Interest income and other income (expense), net	3,504	264	70
Interest expense	-506	-3,183	-3,451
Induced Conversion of Convertible Debt Expense	0	-4,776	0
Loss before provision (benefit) for income taxes	-10,549	-19,356	-27,310
Provision (benefit) for income taxes	1,012	2,055	388
Net loss	-11,561	-21,411	-27,698
Net loss per share-basic and diluted
Net loss per share (in dollars per share)	($0.24)	($0.55)	($0.78)
Shares used in basic and diluted per share computation (in shares)	47,547	38,858	35,393
Comprehensive loss
Net loss	-11,561	-21,411	-27,698
Unrealized gains on available-for-sale securities	-7	-11	26
Foreign currency translation adjustments	-897	-63	24
Comprehensive loss	($12,465)	($21,485)	($27,648)

CONSOLIDATED_STATEMENTS_OF_STO

CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (USD $)	Total	Common Stock	Additional Paid-in Capital	Treasury Stock	Accumulated Other Comprehensive Income	Accumulated Deficit
In Thousands, except Share data, unless otherwise specified
Balance at Dec. 31, 2011	$14,542	$33	$238,798	($14,430)	$189	($210,048)
Balance (in shares) at Dec. 31, 2011		35,198,000		2,339,000
Increase (Decrease) in Shareholders' Equity
Exercise of stock options under stock incentive plans	3,683	1	3,682
Exercise of stock options under stock incentive plans (in shares)		715,000
Issuance of common stock under stock purchase plans	1,542		1,542
Issuance of common stock under stock purchase plans (in shares)		407,000
Issuance of common stock under restricted stock plans, net of shares withheld for employee taxes	-2,346	0	-2,346
Issuance of common stock under restricted stock plans, net of shares withheld for employee taxes (in shares)		2,218,000
Stock-based compensation	13,655		13,655
Unrealized gain (loss) on investments	26				26
Cumulative translation adjustment	24				24
Net loss	-27,698					-27,698
Balance at Dec. 31, 2012	3,428	34	255,331	-14,430	239	-237,746
Balance (in shares) at Dec. 31, 2012		38,538,000		2,339,000
Increase (Decrease) in Shareholders' Equity
Exercise of stock options under stock incentive plans	5,055	1	5,054
Exercise of stock options under stock incentive plans (in shares)		1,429,000
Issuance of common stock under stock purchase plans	1,574	1	1,573
Issuance of common stock under stock purchase plans (in shares)		435,000
Issuance of common stock under restricted stock plans, net of shares withheld for employee taxes	-1,297	3	-1,300
Issuance of common stock under restricted stock plans, net of shares withheld for employee taxes (in shares)		1,544,000
Stock-based compensation	10,395		10,395
Conversion of debt to equity	44,383	6	44,377
Conversion of debt to equity (in shares)		5,871,000
Unrealized gain (loss) on investments	-11				-11
Cumulative translation adjustment	-63				-63
Net loss	-21,411					-21,411
Balance at Dec. 31, 2013	42,053	45	315,430	-14,430	165	-259,157
Balance (in shares) at Dec. 31, 2013		47,817,000		2,339,000
Increase (Decrease) in Shareholders' Equity
Exercise of stock options under stock incentive plans	2,870	1	2,869
Exercise of stock options under stock incentive plans (in shares)		701,000
Issuance of common stock under stock purchase plans	1,983	0	1,983
Issuance of common stock under stock purchase plans (in shares)		319,000
Issuance of common stock under restricted stock plans, net of shares withheld for employee taxes	-1,722	1	-1,723
Issuance of common stock under restricted stock plans, net of shares withheld for employee taxes (in shares)		607,000
Stock-based compensation	11,813		11,813
Conversion of debt to equity	13,942	2	13,940
Conversion of debt to equity (in shares)		1,841,000
Unrealized gain (loss) on investments	-7				-7
Cumulative translation adjustment	-897				-897
Net loss	-11,561					-11,561
Balance at Dec. 31, 2014	$58,474	$49	$344,312	($14,430)	($739)	($270,718)
Balance (in shares) at Dec. 31, 2014		51,285,000		2,339,000

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 loss	($11,561)	($21,411)	($27,698)
Adjustments to reconcile net loss to net cash (used in) provided by operating activities:
Depreciation expense	5,503	4,458	3,114
Amortization of intangible assets	4,971	4,825	5,094
Provision for doubtful accounts and service remediation reserves	852	999	595
Stock-based compensation	11,813	10,395	13,655
Deferred Income Taxes and Tax Credits	-86	237	195
Release of valuation allowance	-265	0	-350
Loss (gain) on disposal of property and equipment	43	3	-2
Amortization of convertible notes issuance cost	58	485	402
Gain on extinguishment of convertible notes	-3,862	0	0
Net amortization on investments	27	79	358
Induced Conversion of Convertible Debt Expense	0	4,776	0
Acquisition-related contingent consideration	0	0	-1,612
Changes in operating assets and liabilities:
Accounts receivable	-11,746	-7,648	-1,112
Prepaid and other current assets	-3,749	486	-820
Other assets	-1,088	-1,276	662
Accounts payable	-794	-1,702	914
Accrued expenses	6,696	106	-1,106
Accrued payroll and related expenses	1,149	1,971	987
Accrued restructuring	-181	-503	443
Deferred revenue	11,371	17,469	4,576
Net cash (used in) provided by operating activities	9,151	13,749	-1,705
Cash flows from investing activities:
Purchases of investments	-2,784	-7,434	-16,536
Proceeds from maturities and sale of investments	7,850	12,250	38,841
Purchases of property and equipment	-7,121	-1,704	-6,692
Proceeds from disposal of property and equipment	4,651	0	2
Purchases of intangible assets	-1,112	-638	-6,196
Acquisitions, net of cash acquired	-15,488	0	-7,715
Net cash provided by (used in) investing activities	-14,004	2,474	1,704
Cash flows from financing activities:
Proceeds from issuance of common stock	4,852	6,629	5,225
Repurchase of common stock from employees for payment of taxes on vesting of restricted stock units	-1,723	-1,297	-2,346
Payment of consideration related to acquisitions	-630	-2,903	-2,660
Payment on debt conversion	-645	-4,374	0
Proceeds from Lines of Credit	10,481	0	0
Repayment of debt assumed through acquisition	0	0	-30
Payment of principal under capital leases	-1,294	-2,319	-1,193
Net cash (used in) provided by financing activities	11,041	-4,264	-1,004
Effect of exchange rates on cash and cash equivalents	-283	-64	22
Net (decrease) increase in cash and cash equivalents	5,905	11,895	-983
Cash and cash equivalents at beginning of period	28,295	16,400	17,383
Cash and cash equivalents at end of period	34,200	28,295	16,400
Supplemental disclosures of cash flow information:
Cash paid for interest on convertible debt	277	2,604	2,813
Cash paid for interest on capital leases	59	100	101
Income Taxes Paid, Net	182	162	0
Conversion of debt to equity	13,942	44,383
Debt Conversion, Converted Instrument, Amount	14,197	45,018	0
Reclassification of deferred debt issuance cost to additional paid-in capital	253	1,037	0
Common stock issued as a premium of debt conversion	0	402	0
Fixed assets acquired under capital lease	0	3,851	0
Unpaid purchases of property and equipment	$5,829	$157	$214

The_Company_and_Significant_Ac

The Company and Significant Accounting Policies	12 Months Ended
	Dec. 31, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract]
The Company and Significant Accounting Policies	The Company and Significant Accounting Policies
	Description of Business
	Callidus Software Inc. (referred to herein as "CallidusCloud", "Callidus", "we" and "our") is a provider of sales and marketing effectiveness software. The Company provides organizations with a complete suite of Lead-to-Money solutions that identify the right leads, ensure proper territory and quota distribution, train sales forces, automate quote and proposal generation, and streamline sales compensation.
	Principles of Consolidation
	The consolidated financial statements include the accounts of Callidus Software, Inc. and its wholly-owned subsidiaries (collectively, the Company), which include wholly-owned subsidiaries in Australia, Canada, Germany, Hong Kong, India, Malaysia, Mexico, New Zealand, Serbia, Singapore, Japan and the United Kingdom. All intercompany transactions and balances have been eliminated in the consolidation.
	Use of Estimates
	The consolidated financial statements are prepared in accordance with U.S. generally accepted accounting principles ("GAAP") as set forth in the Financial Accounting Standards Board’s ("FASB") Accounting Standards Codification ("ASC") and consider the various staff accounting bulletins and other applicable guidance issued by the U.S. Securities and Exchange Commission ("SEC"). These accounting principles require us to make certain estimates, judgments and assumptions. The Company believes that the estimates, judgments and assumptions upon which the Company relies are reasonable based upon information available to us at the time that these estimates, judgments and assumptions are made. These estimates, judgments and assumptions can affect the reported amounts of assets and liabilities as of the date of the financial statements as well as the reported amounts of revenues and expenses during the periods presented. To the extent there are differences between these estimates, judgments or assumptions and actual results, the Company's consolidated financial statements will be affected. In many cases, the accounting treatment of a particular transaction is specifically dictated by GAAP and does not require management’s judgment in its application. There are also areas in which management’s judgment in selecting among available alternatives would not produce a materially different result.
	In addition, illiquid credit markets, volatile equity and foreign currency markets by companies have contributed to the increase in uncertainty in management estimates and assumptions. Also, future events, such as changes in economic environment, cannot be determined with precision, which would cause actual results to differ materially from management's estimates. Such changes in estimates will be reflected in the consolidated financial statements in future periods.
	Foreign Currency Translation
	The Company transact business in various foreign currencies. In general, the functional currency of a foreign operation is the local country’s currency. Accordingly, the foreign currencies are translated into U.S. Dollars using exchange rates in effect at period end for assets and liabilities and average rates during each reporting period for the results of operations. Adjustments resulting from the translation of the financial statements of the foreign subsidiaries are reported as a separate component of accumulated other comprehensive income (loss). Foreign currency transaction gains and losses are included in interest and other income (expense), net in the accompanying consolidated statements of comprehensive loss.
	Cash and Cash Equivalents and Investments
	The Company considers all highly liquid instruments with an original maturity on the date of purchase of three months or less to be cash equivalents. Cash equivalents as of December 31, 2014 and 2013 consisted of money market funds. The Company determines the appropriate classification of investment securities at the time of purchase and re-evaluates such designation as of each balance sheet date. As of December 31, 2014 and 2013, all investment securities were designated as "available-for-sale". The Company considers available-for-sale securities that have a maturity date longer than three months to be short-term investments, including those investments with a maturity date of longer than one year that are highly liquid and for which the Company does not have a positive intent to hold to maturity. These securities are carried at estimated fair value based on quoted market prices or other readily available market information, with the unrealized gains and losses included in other comprehensive income (loss). Recognized gains and losses are included in the consolidated statement of comprehensive loss. When the Company has determined that an other-than-temporary decline in fair value has occurred, the amount of the decline is recognized in earnings. Gains and losses are determined using the specific identification method.
	Fair Value of Financial Instruments and Concentrations of Credit Risk
	The fair value of certain of the Company's financial instruments that are not measured at fair value, including accounts receivable and accounts payable, approximates the carrying amount due to their short maturity. See Note 6 for discussion regarding the valuation of the Company's investments. Financial instruments that potentially subject us to concentrations of credit risk are short-term investments and trade receivables. The Company mitigates concentration of risk by monitoring the risk profiles of all bank counterparties on at least a quarterly basis. Based on the on-going assessment of counterparty risk, the Company will adjust its exposure to various counterparties.
	The Company's customer base consists of businesses throughout the Americas, Europe, Middle East, Africa and Asia-Pacific. The Company performs ongoing credit evaluations of its customers and generally does not require collateral on accounts receivable. As of December 31, 2014 and 2013, the Company had no customers comprising greater than 10% of net accounts receivable or total revenue. Refer to Note 16 for information regarding revenue by geographic areas.
	In May, 2014, the Company entered into a credit agreement with Wells Fargo Bank, National Association ("Wells Fargo"), under which Wells Fargo agreed to make a revolving loan ("Revolver") to us in an amount not to exceed $10.0 million, with an accordion feature that allows the Company to increase the maximum borrowing amount by not less than $5.0 million and not more than $10.0 million. The Revolver matures in May 2019. Outstanding borrowings under the Revolver bear interest, at the Company's option, at a base rate plus an applicable margin. The applicable margin ranges between 0.75% and 2.25% depending on the Company's leverage ratio. Interest is payable every three months. In September 2014 the Company exercised the accordion feature and increased the maximum amount of borrowing to $15.0 million. As of December 31, 2014 the Company had borrowed $10.5 million under the Revolver. The carrying value of total debt approximates fair market value.
	Holdback Payable
	The Company estimates the fair value of an indemnity holdback payable based on the contract value. The terms of the holdback payable includes standard representations and warranties.
	Contingent Consideration
	The Company estimates the fair value of the contingent consideration issued in business combinations using a probability-based income approach. The fair value of the Company liability-classified contingent consideration is remeasured at each reporting period, with any changes in the fair value recorded as income or expense. Contingent acquisition consideration payable is included in accrued liabilities on the Company's consolidated balance sheets.
	Allowance for Doubtful Accounts
	The Company reduces gross trade accounts receivable with its allowance for doubtful accounts. The allowance for doubtful accounts is the Company's estimate of the amount of probable credit losses in existing accounts receivable. Management analyzes accounts receivable and historical bad debt experience, customer creditworthiness, current economic trends and changes in customer payment history when evaluating the adequacy of the allowance for doubtful accounts. Provisions to the allowance for doubtful accounts are recorded in general and administrative expenses.
	Below is a summary of the changes in the Company's allowance for doubtful accounts for 2014, 2013 and 2012 (in thousands):
		Balance at Beginning of Year		Additions (charges to expense)		Deductions			Balance at
									End of Year
	Allowance for doubtful accounts
	Year ended December 31, 2014	$	650	$	996	$	(583	)	$	1,063
	Year ended December 31, 2013	481		830		(661		)	650
	Year ended December 31, 2012	225		434		(178		)	481
	Prepaid and Other Current Assets and Deposits and Other Assets
	Included in prepaid and other current assets and deposits and other in long-term assets in the consolidated balance sheets at December 31, 2014 and 2013 is restricted cash totaling $0.2 million and $0.5 million, respectively, primarily related to security deposits on leases of the Company's facilities. The restricted cash represents investments in certificates of deposit required by landlords to meet security deposit requirements for the leased facilities. Restricted cash is included in prepaid and other current assets in short-term assets and deposits and other assets in long-term assets based on the contractual term for the release of the restriction.
	Property and Equipment, net
	Property and equipment, net is stated at cost, net of accumulated depreciation. Depreciation is calculated using the straight-line method over the estimated useful lives of the respective assets, generally three to five years. Leasehold improvements are amortized over the lesser of the assets' estimated useful lives or the related lease terms. Expenditures for maintenance and repairs are expensed as incurred. Cost and accumulated depreciation of assets sold or retired are removed from the respective property accounts and any resulting gain or loss is reflected in the consolidated statements of comprehensive loss.
	Goodwill, Intangible Assets, Long-Lived Assets and Impairment Assessments
	Goodwill represents the excess of the purchase price over the fair value of net assets acquired in connection with business combinations. Goodwill is not amortized, but instead goodwill is required to be tested for impairment annually and under certain circumstances. The Company performs such testing of goodwill in the fourth quarter of each year, or as events occur or circumstances change that would more likely than not reduce the fair value of a reporting unit below its carrying amount.
	The Company conducts a two-step test for impairment of goodwill. The first step of the test for goodwill impairment compares the fair value of the applicable reporting unit with its carrying value. If the fair value of a reporting unit is less than the reporting unit's carrying value, the Company will perform the second step of the test for impairment of goodwill. During the second step of the test for impairment of goodwill, the Company will compare the implied fair value of the reporting unit's goodwill with the carrying value of that goodwill. If the carrying value of the goodwill exceeds the calculated implied fair value, the excess amount will be recognized as an impairment loss. The Company has one reporting unit and evaluates goodwill for impairment at the entity level. Based upon the results of the step one testing, the Company concluded that no impairment existed as December 31, 2014, and did not perform the second step of the goodwill impairment test.
	Intangible assets with finite lives are amortized over their estimated useful lives of one to twelve years. Generally, amortization is based on the higher of a straight-line method or the pattern in which the economic benefits of the intangible asset will be consumed.
	The Company also evaluates the recoverability of its long-lived assets for possible impairment whenever events or circumstances indicate that the carrying amount of such assets may not be recoverable. If such review indicates that the carrying amount of long-lived assets is not recoverable, the carrying amount of such assets is reduced to fair value. There were no impairment charges recorded during the years ended December 31, 2014, 2013 and 2012.
	Business Combinations
	The Company recognizes assets acquired, liabilities assumed, and contingent consideration at their fair value on the acquisition date. The Company’s estimates are inherently uncertain and subject to refinement. As a result, during the measurement period, which may be up to one year from the acquisition date, the Company may record adjustments to the fair value of assets acquired and liabilities assumed, with a corresponding offset to goodwill. Upon the conclusion of the measurement period or final determination of the fair value of assets acquired or liabilities assumed, whichever comes first, any subsequent adjustments are recorded to the Company's consolidated statements of operations. See Note 3 to the Company's consolidated financial statements, for a discussion of the Company's acquisitions during 2014.
	In addition, uncertainties in income tax and tax related valuation allowances assumed in connection with a business combination are initially estimated as of the acquisition date. The Company continues to gather information and evaluate these items and records any adjustments to the preliminary estimates to goodwill when the estimates are within the measurement period. Subsequent to the measurement period, changes to these income tax uncertainties and tax related valuation allowances will affect the Company's provision for income taxes in its consolidated statements of comprehensive loss.
	Revenue Recognition
	The Company generates revenue by providing software applications as a service through on-demand subscription, perpetual and term licenses and related software maintenance, and professional services. Amounts that have been invoiced are recorded in accounts receivable and in deferred revenue or revenue, depending on whether the revenue recognition criteria have been met.
	Recurring Revenue. Recurring revenue, which includes SaaS revenue and maintenance revenue, are recognized as revenue ratably over the stated contractual period. SaaS revenue consists of subscription fees from customers accessing our cloud-based service offerings. Maintenance revenue consists of fees from customers purchasing subscriptions and receiving support for on-premise solutions. The Company also recognizes revenue associated with customers using its products in excess of contracted usage. This customer excess use is primarily attributed to SaaS products and are recorded in SaaS revenue. Revenue related to customer excess use was immaterial during 2014 and 2013.
	Service and Other Revenue. Service and other revenue primarily consist of training, integration, and configuration services. Generally, the Company's professional services arrangements are on a time-and-materials basis. Time and material services are recognized as revenue as the services are rendered based on inputs to the project, such as billable hours incurred. For fixed-fee professional service arrangements, the Company recognizes revenue under the proportional performance method of accounting and estimates the proportional performance on a monthly basis, utilizing hours incurred to date as a percentage of total estimated hours to complete the project. If the Company does not have a sufficient basis to measure progress toward completion, revenue is recognized upon completion. Service and other revenue also includes license revenue from perpetual licenses which are recognized upon delivery of the product, using the residual method, assuming all the other conditions for revenue recognition have been met.
	In certain arrangements with non-standard acceptance criteria, the Company defers the revenue until the acceptance criteria are satisfied. Reimbursements, including those related to travel and out-of-pocket expenses, are included in services and other revenue, and an equivalent amount of reimbursable expenses is included in cost of services and other revenue.
	In general, recurring revenue agreements are entered into for twelve to thirty-six months, and the professional services are performed within nine months of entering into a contract with the customer, depending on the size of integration.
	SaaS agreements provide specified service level commitments, excluding scheduled maintenance. The failure to meet this level of service availability may require the Company to credit qualifying customers a portion of their subscription and support fees. Based on the Company's historical experience meeting its service level commitments, the Company does not currently have any liabilities on its balance sheet for these commitments.
	The Company recognizes revenue when all of the following conditions are met:
	• Persuasive evidence of an arrangement exists;
	• Delivery has occurred or services have been rendered;
	• The fees are fixed or determinable; and
	• Collection of the fees is reasonably assured.
	If the Company determines that any one of the four criteria is not met, it will defer recognition of revenue until all the criteria are met.
	Multiple-deliverable arrangements with on-demand subscription. For on-demand subscription agreements with multiple-deliverables, the Company evaluates each element to determine whether it represents a separate unit of accounting. The Company determines the best estimated selling price of each deliverable in an arrangement based on a selling price hierarchy of methods contained in Financial Accounting Standards Board (“FASB”) Accounting Standards Update (“ASU”) No. 2009-13, Revenue Recognition (Accounting Standards Codification (“ASC”) Topic 605)-Multiple-Deliverable Revenue Arrangements. The best estimated selling price for a deliverable is based on its vendor-specific objective evidence (“VSOE”), if available, third-party evidence (“TPE”), if VSOE is not available, or estimated selling price (“ESP”), if neither VSOE nor TPE is available. Total arrangement fees are allocated to each element using the relative selling price method. The Company has currently established VSOE for most deliverables, except for fixed fee service arrangements.
	The Company considered all of the following factors to establish the ESP for fixed fee service arrangements when sold with its on-demand services: the weighted average actual sales prices of professional services sold on a standalone basis for on-demand services; average billing rate for fixed fee service agreements when sold with on-demand services, cost plus a reasonable mark-up and other factors such as gross margin objectives, pricing practices and growth strategy. The Company is currently using cost plus a reasonable mark-up to establish ESP for fixed fee service.
	Multiple-deliverable arrangements with on-premise license. For arrangements with multiple-deliverables, including license, professional services and maintenance, the Company recognizes license revenue using the residual method of accounting pursuant to the requirements of the guidance contained in ASC 985-605, Software Revenue Recognition. Under the residual method, revenue is recognized when VSOE for fair value exists for all of the undelivered elements in the arrangement, but does not exist for one or more of the delivered elements in the arrangement. If evidence of fair value cannot be established for the undelivered elements, all of the revenue is deferred until evidence of fair value can be established, or until the items for which evidence of fair value cannot be established are delivered. For maintenance and certain professional services, the Company has established VSOE as a consistent number of standalone sales of this deliverable have been priced within a reasonably narrow range. The Company's revenue arrangements generally do not include a general right of return relative to the delivered products.
	For the Company's term-based licenses, included in services and licenses, that are typically bundled with maintenance for the entire duration of the license, if the only undelivered element is maintenance, then the entire amount of revenue is recognized over the maintenance period, as maintenance is not typically sold separately.
	Sales and other taxes collected from customers to be remitted to government authorities are excluded from revenue.
	Deferred Revenue
	Deferred revenue consists of invoicing and payments received in advance of revenue recognition and is recognized as the revenue recognition criteria are met. The Company invoices its customers annually, quarterly, or in monthly installments. Deferred revenue that will be recognized during the succeeding twelve month period is recorded as current deferred revenue, and the remaining portion is recorded as non-current deferred revenue.
	Cost of Revenue
	Cost of recurring revenue consists primarily of salaries, benefits, allocated overhead costs related to on-demand operations and technical support personnel, as well as allocated amortization of purchased technology. Cost of services revenue consists primarily of salaries, benefits, travel and allocated overhead costs related to consulting, training and other professional services personnel, including cost of services provided by third-party consultants engaged by the Company. Cost of license revenue consists primarily of amortization of purchased technology.
	Deferred Commissions
The deferred commissions on the Company's consolidated balance sheets totaled $5.6 million and $4.8 million at December 31, 2014 and December 31, 2013, respectively. As of December 31, 2014 and 2013 $4.2 million and $3.4 million of the deferred commissions are included in prepaid and other current assets in short-term assets with the remaining amounts included in deposits and other assets in long-term assets in the consolidated balance sheets. The deferred costs mainly represent commission payments to the Company's direct sales force for on-demand subscription and maintenance agreements, which the Company amortizes as sales and marketing expense over the non-cancellable term of the contract as the related revenue is recognized. The commission payments are a direct and incremental cost of the revenue arrangements.
Restructuring and Other Expenses
Restructuring and other expenses are comprised primarily of employee termination costs related to headcount reductions, costs related to properties abandoned in connection with facilities consolidation including estimated losses related to excess facilities based upon the Company's contractual obligations, net of estimated sublease income and related write-downs of leasehold improvements. The Company reassess the liability for excess facilities periodically based on market conditions.
Research and Development
The Company expenses the cost of research and development as incurred. Research and development expenses consist primarily of expenses for research and development staff, the cost of certain third-party service providers and allocated overhead.
Stock-Based Compensation
The Company measures and recognizes compensation expense for stock-based awards made to employees and directors including employee stock options and employee stock purchases under the Company's Employee Stock Purchase Plan ("ESPP") based on estimated fair values on the date of grant using the Black-Scholes option pricing model. Stock-based compensation expense for restricted stock units ("RSU"), relating to both performance and service-based awards, is estimated based on the market value of the Company's stock on the date of grant.
The Company granted performance-based share award ("PSUs") to select executives and other key employees.  The Company's PSUs are in the form of restricted stock units, the vesting of which is based on achievement of specified company or other goals. In 2014, the Company granted PSUs with vesting contingent on its absolute SaaS revenue growth over the three year period from 2014 to 2016, and the Company's relative total shareholder return over the three year period from 2014 through 2016 compared to an index of 17 SaaS companies. PSU awards based on SaaS revenue growth will, to the extent the performance criteria are achieved, vest on the third anniversary of the grant date. PSU awards based on total shareholder return is recognized as compensation costs over the requisite service period, if rendered, even if the market condition is never satisfied. In determining the fair value of PSUs based on total shareholder return the Company considered the achievement of the market condition in the estimated fair value.
Income Taxes
The Company is subject to income and foreign withholding taxes in both the United States and foreign jurisdictions and the Company uses estimates in determining its provision for income taxes. This process involves estimating actual current tax assets and liabilities together with assessing temporary differences resulting from differing treatment of items for tax and accounting purposes. These differences result in deferred tax assets and liabilities, which are recorded on the consolidated balance sheets. Net deferred tax assets are recorded to the extent the Company believes that these assets will more likely than not be realized. In making such determination, all available positive and negative evidence is considered, including scheduled reversals of deferred tax liabilities, projected future taxable income, tax planning strategies and recent financial operations. With the exception of the net deferred tax assets of two of the Company's foreign subsidiaries, it maintained a full valuation allowance against its net deferred tax assets at December 31, 2014 because the Company believes that it is not more-likely-than-not that the gross deferred tax assets will be realized. While the Company has considered future taxable income and ongoing prudent and feasible tax planning strategies in assessing the need for a valuation allowance, in the event the Company was able to determine that it would be able to realize the deferred tax assets in the future, an adjustment to the deferred tax assets would increase net income in the period such determination was made.
Income tax positions must meet a more-likely-than-not recognition threshold at the effective date to be recognized upon the adoption of accounting for uncertainty in income taxes and in subsequent periods. This interpretation also provides guidance on measurement, derecognition, classification, interest and penalties, accounting in interim periods, disclosure and transition. The Company recognizes interest and penalties related to unrecognized tax benefits in income tax expense in the accompanying consolidated statement of comprehensive loss. Accrued interest and penalties are included in other liabilities.
Advertising Costs
The Company expenses advertising costs in the period incurred. Advertising expense was $1.2 million, $227,000, and $146,000 for 2014, 2013 and 2012, respectively.
Comprehensive Income (Loss)
Comprehensive income (loss) is the total of net income (loss), unrealized gains and losses on investments and foreign currency translation adjustments. Unrealized gains and losses on investments and foreign currency translation adjustment amounts are excluded from net loss and are reported in accumulated other comprehensive income (loss) in the accompanying consolidated financial statements.
Recent Accounting Pronouncements
In May 2014, the FASB issued Accounting Standards Update No. 2014-09 (ASU 2014-09) "Revenue from Contracts with Customers." ASU 2014-09 supersedes the revenue recognition requirements in “Revenue Recognition (Topic 605)”, and requires entities to recognize revenue when it transfers promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled to in exchange for those goods or services. ASU 2014-09 is effective for annual reporting periods beginning after December 15, 2016, including interim periods within that reporting period. Early adoption is not permitted. The Company is currently in the process of evaluating the impact of the adoption of ASU 2014-09 on the consolidated financial statements.

Restructuring

Restructuring	12 Months Ended
	Dec. 31, 2014
Restructuring and Related Activities [Abstract]
Restructuring	Restructuring and Other
	On June 30, 2014, management approved and initiated restructuring plans to realign the Company's resources to improve cost efficiencies. Restructuring and other expenses primarily consist of costs associated with exit of excess facilities, employee terminations and incremental depreciation expense as a result of the change in the estimated useful life of assets to be abandoned.
	The Company incurred restructuring and other expenses of $1.0 million, $1.7 million, and $1.1 million for the year ended December 31, 2014, 2013 and 2012, respectively.
	The following table sets forth a summary of accrued restructuring expenses for 2014 and 2013 (in thousands):
		December 31,		Additions		Adjustments			Cash Payments			December 31,
		2013										2014
	Severance and termination-related costs	$	141	$	70	$	—		$	(211	)	$	—
	Facilities related costs	234		162		20			(222		)	194
	Total accrued restructuring expenses	$	375	$	232	$	20		$	(433	)	$	194
		December 31,		Additions		Adjustments			Cash Payments			December 31,
		2012										2013
	Severance and termination-related costs	$	589	$	1,706	$	(7	)	$	(2,147	)	$	141
	Facilities related costs	289		—		—			(55		)	234
	Total accrued restructuring expenses	$	878	$	1,706	$	(7	)	$	(2,202	)	$	375
	In 2014, the Company incurred $0.8 million of non-cash expense, primarily related to incremental depreciation as a result of the change in the estimated useful life of assets at the Company's office space at Pleasanton, California.

Acquisition

Acquisition	12 Months Ended
	Dec. 31, 2014
Business Combinations [Abstract]
Acquisition	Acquisitions
	Clicktools Ltd.
	On September 16, 2014, the Company acquired Clicktools Ltd. (“Clicktools”), a provider of premium, cloud-based survey products and services for businesses. The purchase consideration was $16.4 million , which included $14.8 million paid in cash and a one million British Pounds indemnity holdback payable upon the one year closing anniversary. This amount is translated to U.S. Dollars to $1.6 million at the prevailing exchange rate on December 31, 2014.
	The preliminary purchase price allocation for Clicktools is summarized as follows (in thousands):
		Fair Value
	Net liabilities assumed	$	(1,270	)
	Intangible assets	3,000
	Goodwill	14,675
	Total purchase price	$	16,405
	The excess of purchase consideration over the fair value of net tangible liabilities assumed and identifiable intangible assets acquired was recorded as goodwill. The estimated fair values of assets acquired and liabilities assumed, specifically current and noncurrent income taxes payable and deferred taxes, may be subject to change as additional information is received and certain tax returns are finalized. Thus the provisional measurements of fair value set forth above are subject to change.
	Goodwill is primarily attributed to the anticipated synergies from the acquisition and expanded market opportunities with respect to the integration of Clicktools' business-to-business survey management platform with the Company's other solutions. The goodwill balance is not deductible for U.S. or U.K income tax purposes.
	The following table sets forth the components of identifiable intangible assets acquired and their estimated useful lives as of the date of the Clicktools acquisition (in thousands). The intangible assets are reported in British Pounds and will be translated to U.S. Dollars at December 31, 2014.
		Fair Value				Useful Life
	Developed technology	$	1,300			3 years
	Domain names and trademarks	600				3 years
	Customer relationships	1,100				3 years
	Total intangible assets subject to amortization	$	3,000
	Pro forma results of operations for the Clicktools acquisition have not been presented because the acquisition is not material.
	LeadRocket, Inc.
	On February 4, 2014, the Company acquired all of the common stock of LeadRocket, Inc. (“LeadRocket”), a privately-held company providing marketing automation and demand generation solutions that enable both marketing and sales users to identify and connect with leads efficiently. The Company acquired LeadRocket to strengthen its social engagement and digital marketing platform. The purchase consideration was $3.0 million, which included $2.5 million paid in cash and $0.5 million as indemnity holdback payable upon the one year closing anniversary. As of December 31, 2014, $0.3 million of the indemnity holdback remains accrued for potential indemnification claims.
	The purchase price allocation for LeadRocket is summarized as follows (in thousands):
		Fair Value
	Net liabilities assumed	$	(1,224	)
	Intangible assets	2,640
	Goodwill	1,584
	Total purchase price	$	3,000
	The excess of purchase consideration over the fair value of net tangible liabilities assumed and identifiable intangible assets acquired was recorded as goodwill. The fair values assigned to tangible and identifiable intangible assets acquired and liabilities assumed are based on management’s estimates and assumptions. The estimated fair values of assets acquired and liabilities assumed, specifically current and noncurrent income taxes payable and deferred taxes, may be subject to change as additional information is received and certain tax returns are finalized. Thus the provisional measurements of fair value set forth above are subject to change.
	The goodwill balance is primarily attributed to the anticipated synergies from the acquisition and expanded market opportunities with respect to the integration of LeadRocket’s digital marketing platform with the Company's other solutions. The goodwill balance is not deductible for U.S. income tax purposes.
	The following table sets forth the components of identifiable intangible assets acquired and their estimated useful lives as of the date of the LeadRocket acquisition (in thousands):
		Fair Value			Useful Life
	Developed technology	570			2-4 years
	Patents	1,060			10 years
	Domain names and trademarks	850			5 years
	Customer relationships	160			3 years
	Total intangible assets subject to amortization	2,640
	Pro forma results of operations for the LeadRocket acquisition have not been presented because the acquisition is not material.

Goodwill_and_Intangible_Assets

Goodwill and Intangible Assets	12 Months Ended
	Dec. 31, 2014
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Intangible Assets	Goodwill and Intangible Assets
	Goodwill
	The changes in the carrying amount of goodwill for the fiscal years ended December 31, 2014 and 2013 are as follows (in thousands):
		Goodwill
	Balance as of December 31, 2012 and 2013	$	31,207
	Acquisitions	16,259
	Foreign currency translation impact	(496		)
	Balance as of December 31, 2014	$	46,970
	In February 2014, the Company recorded goodwill of $1.6 million related to the acquisition of LeadRocket Inc. and in the last quarter of 2014, the Company recorded goodwill of $14.7 million related to the acquisition of Clicktools Ltd. Refer to Note 3, Acquisitions for further details.
	Based on the Company's annual impairment review in the fourth quarter of 2014, 2013 and 2012, it concluded that goodwill was not impaired in any of the years presented.
	Intangible assets
	Intangible assets consisted of the following as of December 31, 2014 and 2013 (in thousands):
		December 31,			December 31, 2013 Net		Net Additions (1)		Foreign currency translation impact			Amortization Expense			December 31,		Weighted
		2013 Cost													2014 Net		Average
																	Amortization
																	Period (Years)
	Developed technology	$	21,187		$	9,669	$	3,906	$	(53	)	$	(3,271	)	$	10,251	4.1
	Customer relationships	8,154			4076		1,260		(41		)	(1,025		)	4,270		3.6
	Tradenames	1,522			828		686		(25		)	(298		)	1,191		3.6
	Favorable lease	53			—		—		—			—			—		N/A
	Patents and licenses	3,059			2393		—		—			(348		)	2,045		6.7
	Other	142			29		—		—			(29		)	—		N/A
	Total	$	34,117		$	16,995	$	5,852	$	(119	)	$	(4,971	)	$	17,757
	-1	Included in the additions are the intangibles acquired for Clicktools of $3.0 million and LeadRocket of $2.6 million as discussed in Note 3 to the consolidated financial statements and other purchased technology as part of the normal course of operations.
		December 31,			December 31, 2012 Net		Net Additions		Foreign currency translation impact			Amortization Expense			December 31,		Weighted
		2012 Cost													2013 Net		Average
																	Amortization
																	Period (Years)
	Developed technology	$	20,576		$	12,384	$	611	$	—		$	(3,326	)	$	9,669	4.3
	Customer relationships	8,154			4,952		—		—			(876		)	4,076		4.9
	Tradenames	1,522			1,040		—		—			(212		)	828		5.2
	Favorable lease	40			1		13		—			(14		)	—		N/A
	Patents and licenses	3,059			2,744		—		—			(351		)	2,393		7.6
	Other	142			75		—		—			(46		)	29		0.5
	Total	$	33,493		$	21,196	$	624	$	—		$	(4,825	)	$	16,995
	Amortization expense related to intangible assets was $5.0 million, $4.8 million and $5.1 million in 2014, 2013 and 2012, respectively, and was charged to cost of revenue for purchased technology, tradenames and patents and licenses; sales and marketing expense for customer relationships; and general and administrative expense for the favorable lease and other. The Company's intangible assets are amortized over their estimated useful lives of one to twelve years. Total future expected amortization is as follows (in thousands):
		Developed			Customer		Tradenames		Patents and
		Technology			Relationships				Licenses
	Year Ending December 31:
	2015	$	2,828		$	1,290	$	382	$	346
	2016	2,741			1,290		353		346
	2017	2,417			1,019		285		346
	2018	1,519			491		96		313
	2019	311			74		32		180
	2020 and beyond	435			106		43		514
	Total expected amortization expense	$	10,251		$	4,270	$	1,191	$	2,045

Financial_Instruments

Financial Instruments	12 Months Ended
	Dec. 31, 2014
Financial Instruments
Financial Instruments	Financial Instruments
	As of December 31, 2014, all marketable debt securities are classified as available-for-sale and carried at estimated fair value, which is determined based on the inputs discussed below.
	The Company classifies all highly liquid instruments with an original maturity on the date of purchase of three months or less as cash and cash equivalents. The Company classifies available-for-sale securities that have a maturity date longer than three months to be short-term investments, including those investments with a maturity date of longer than one year that are highly liquid and for which the Company does not have a positive intent to hold to maturity.
	Interest income is included within interest income and other income (expense), net in the accompanying consolidated statements of comprehensive loss. Realized gains and losses are calculated using the specific identification method. As of December 31, 2014 and 2013, the Company had no short-term investments in an unrealized loss position for a duration greater than 12 months.
	The components of the Company's marketable debt securities classified as available-for-sale were as follows at December 31, 2014 (in thousands):
	December 31, 2014	Amortized		Gross		Gross			Estimated
		Cost		Unrealized		Unrealized			Fair value
				Gains		Losses
	Cash	$	27,890	$	—	$	—		$	27,890
	Cash equivalents:
	Money market funds	6,310		—		—			6,310
	Total cash equivalents	6,310		—		—			6,310
	Total cash and cash equivalents	$	34,200	$	—	$	—		$	34,200
	Short-term investments:
	Corporate notes and obligations	2,773		—		(7		)	2,766
	Total short-term investments	$	2,773	$	—	$	(7	)	$	2,766
	For investments in securities classified as available-for-sale, market value and the amortized cost of debt securities have been classified in accordance with the following maturity groupings based on the contractual maturities of those securities as of December 31, 2014 (in thousands):
	Contractual maturity	Amortized		Estimated
		Cost		Fair value
	Less than 1 year	$	1,956	$	1,954
	Between 1 and 2 years	817		812
	Total	$	2,773	$	2,766
	The components of the Company's marketable debt securities classified as available-for-sale were as follows for December 31, 2013 (in thousands):
	December 31, 2013	Amortized		Gross		Gross			Estimated
		Cost		Unrealized		Unrealized			Fair value
				Gains		Losses
	Cash	$	21,989	$	—	$	—		$	21,989
	Cash equivalents:
	Money market funds	6,306		—		—			6,306
	Total cash equivalents	6,306		—		—			6,306
	Total cash and cash equivalents	$	28,295	$	—	$	—		$	28,295
	Short-term investments:
	U.S. government and agency obligations	6,115		—		—			6,115
	Corporate notes and obligations	1,751		—		—			1,751
	Total short-term investments	$	7,866	$	—	$	—		$	7,866
	For investments in securities classified as available-for-sale, estimated fair value and the amortized cost of debt securities have been classified in accordance with the following maturity groupings based on the contractual maturities of those securities as of December 31, 2013 (in thousands):
	Contractual maturity	Amortized		Estimated
		Cost		Fair value
	Less than 1 year	$	5,066	$	5,066
	Between 1 and 2 years	2,800		2,800
	Total	$	7,866	$	7,866
	The Company had no realized losses on sales of its investments during the years ended December 31, 2014, 2013, and 2012, respectively. The Company had proceeds, net of purchases of investments, of $5.1 million and $4.8 million from maturities and sales of investments for 2014 and 2013, respectively.
	The short-term investments in government obligations or highly rated credit securities generally have minor to moderate fluctuations in the fair values from period to period. The Company monitors credit ratings, downgrades and significant events surrounding these securities so as to assess if any of the impairments will be considered other-than-temporary. The Company did not identify any government obligations or highly rated credit securities held as of December 31, 2014 and 2013 for which the fair value declined significantly below amortized cost and were considered other-than-temporary impairments.

Fair_Value_Measurements

Fair Value Measurements	12 Months Ended
	Dec. 31, 2014
Fair Value Disclosures [Abstract]
Fair Value Measurements	Fair Value Measurements
	The Company measures financial assets at fair value on an ongoing basis. The estimated fair value of the Company's financial assets was determined using the following inputs at December 31, 2014 and 2013 (in thousands):
			Fair Value Measurements at Reporting Date Using
	December 31, 2014		Total		Quoted Prices in		Significant		Significant
					Active Markets for		Other Observable Inputs		Unobservable
					Identical Assets		(Level 2)		Inputs
					(Level 1)				(Level 3)
	Assets:
	Money market funds (1)		$	6,310	$	6,310	$	—	$	—
	Corporate notes and obligations (2)		2,766		—		2,766		—
	Total		$	9,076	$	6,310	$	2,766	$	—
	_______________________________________________________________________________
	-1	Included in cash and cash equivalents on the consolidated balance sheet.
	-2	Included in short-term investments on the consolidated balance sheet.
			Fair Value Measurements at Reporting Date Using
	December 31, 2013		Total		Quoted Prices in		Significant		Significant
					Active Markets for		Other Observable		Unobservable
					Identical Assets		Inputs		Inputs
					(Level 1)		(Level 2)		(Level 3)
	Assets:
	Money market funds(1)		$	6,306	$	6,306	$	—	$	—
	Corporate notes and obligations(2)		6,115		—		6,115		—
	U.S. government and agency obligations(2)		1,751		—		1,751		—
	Total		$	14,172	$	6,306	$	7,866	$	—
	_______________________________________________________________________________
	-1	Included in cash and cash equivalents on the consolidated balance sheet.
	-2	Included in short-term investments on the consolidated balance sheet.
	During 2014 and 2013 the Company had no Level 3 instruments.
	Valuation of Investments
	Level 1 and Level 2
	The Company's available-for-sale securities include money market funds, U.S. Treasury bills, commercial paper, corporate notes and obligations, and U.S. government and agency obligations. The Company values these securities using a pricing matrix from a pricing service provider, who may use quoted prices in active markets for identical assets (Level 1 inputs) or inputs other than quoted prices that are observable either directly or indirectly (Level 2 inputs). The Company classifies all of its available-for-sale securities, except for money market funds and U.S. Treasury, as having Level 2 inputs. The Company validates the estimated fair value of certain securities from a pricing service provider on a quarterly basis. The valuation techniques used to measure the fair value of the financial instruments having Level 2 inputs, all of which have counterparties with high credit ratings, were derived from the following: non-binding market consensus prices that are corroborated by observable market data, quoted market prices for similar instruments or pricing models, with all significant inputs derived from or corroborated by observable market data.
	Level 3
	The Company did not have any transfers between Level 1, Level 2 and Level 3 fair value measurements during the year ended December 31, 2014 as there were no changes in the composition in Level 1, 2 or 3.

Balance_Sheet_Components

Balance Sheet Components	12 Months Ended
	Dec. 31, 2014
Balance Sheet Components
Balance Sheet Components	Balance Sheet Components
	Property and equipment consisted of the following (in thousands):
		Estimated Useful Life		As of December 31,
				2014				2013
	Equipment	3 years		$	24,189			$	16,616
	Purchased software	5 years		6,784				6,648
	Furniture and fixtures	3 years		1,772				1,612
	Leasehold improvements	Lease term up to 5 years		1,947				1,872
	Construction in progress			3,724				72
	Property and equipment, gross			38,416				26,820
	Less: Accumulated depreciation			19,661				15,469
	Property and equipment, net			$	18,755			$	11,351
	Depreciation expense for 2014, 2013 and 2012 was $4.8 million, $4.5 million and $3.1 million, respectively.
	In 2014, the Company improved its data center and incurred equipment costs. In addition, the Company moved its headquarters from Pleasanton, California to Dublin, California in February 2015 and incurred construction in progress costs related to furniture, fixtures and leasehold improvements.
	Property and equipment includes assets that were acquired under capital leases of $6.9 million and $7.3 million for the years ended December 31, 2014 and 2013, respectively. Accumulated amortization relating to these assets acquired under capital leases were $4.3 million and $3.5 million for the years ended December 31, 2014 and 2013, respectively. Amortization expense for these assets have been included in depreciation expense.
	Total prepaid and other current assets consisted of the following (in thousands):
		As of December 31,
		2014				2013
	Foreign withholding tax	$	177			$	403
	Convertible debt issuance costs, current portion	—				129
	Deferred commissions	4,215				3,381
	Prepaid expenses	5,856				1,945
	Other current assets	136				374
	Total prepaid and other current assets	$	10,384			$	6,232
	Accrued payroll and related expenses consisted of the following (in thousands):
		As of December 31,
		2014				2013
	Vacation accrual	$	2,793			$	2,139
	Commissions	2,387				2,177
	Bonus	1,628				1,262
	ESPP	966				686
	Severance liability	—				252
	Accrued payroll related expenses	1,277				861
	Total accrued payroll related expenses	$	9,051			$	7,377
	Accrued expenses consisted of the following (in thousands):
		As of December 31,
		2014				2013
	Sales tax payable	$	733			$	1,099
	Income taxes payable	125				87
	Restructuring facility liability	148				98
	Versata settlement	1,963				—
	Holdback payable	1,922				—
	Customer payments	998				438
	Equipment financing arrangement	3,775				—
	Accrued expenses	7,204				3,673
	Total accrued expenses	$	16,868			$	5,395

Convertible_Notes

Convertible Notes	12 Months Ended
	Dec. 31, 2014
Debt Disclosure [Abstract]
Convertible Notes	Convertible Notes
	The Convertible Notes contain an optional redemption feature which allows the Company, any time after June 6, 2014, to redeem all or part of the Convertible Notes for cash if the last reported sale price per share of common stock (as defined below) had been at least 130% of the conversion price then in effect for at least 20 trading days during any 30 consecutive trading-day period ending within 5 trading days prior to the date on which the Company provides notice of redemption. The redemption price would be 100% of the principal amount of the notes being redeemed, plus accrued and unpaid interest.
	During 2014, the remaining aggregate principal amount of $14.2 million of the Company's 4.75% Convertible Senior Notes (“Convertible Notes”) were converted into 1,840,770 shares of common stock. The Company paid accrued interest of $0.3 million and reclassified $0.3 million of deferred debt issuance costs to additional paid-in capital in connection with the conversion of the Convertible Notes. As of December 31, 2014, the Company had no outstanding Convertible Notes or related deferred debt issuance costs.
	During the fourth quarter of 2013, the Company entered into agreements with three existing holders of its Convertible Notes pursuant to which such holders converted $45.0 million aggregate principal amount of the Convertible Notes into 5,837,015 shares of the Company’s common stock. In addition to issuing the requisite number of shares of the Company’s common stock pursuant to the terms of the Convertible Notes, the Company also paid accrued interest of $0.3 million, associated broker cost, cash and stock premium of $4.8 million. The cash and stock premium recognized as Debt Conversion Expense on the Consolidated Statement of Comprehensive Loss for the twelve months ended December 31, 2013. Additionally, in 2013 the Company reclassified $1.0 million of deferred debt issuance costs to additional paid-in capital in connection with the conversion of the Convertible Notes. The current balance of the debt issuance costs associated with the issuance of the Convertible Notes was recorded within prepaid and other current assets, and the non-current balance was recorded within deposits and other assets, and has been amortized to interest expense over the terms of the Convertible Notes. As of December 31, 2013, $0.1 million of the debt issuance costs were included in prepaid and other current assets, with the remaining amount of $0.2 million recorded in deposits and other.

Contractual_Obligations_Commit

Contractual Obligations, Commitments and Contingencies	12 Months Ended
	Dec. 31, 2014
Commitments and Contingencies Disclosure [Abstract]
Contractual Obligations, Commitments and Contingencies	Contractual Obligations, Commitments and Contingencies
	Contractual Obligations and Commitments
	For each of the next five years and beyond, the Company has the following contractual obligations, long-term operating and capital lease obligations and unconditional purchase commitments (in thousands):
			Settlement Payable (1)				Unconditional		Operating		Capital
							purchase		lease		lease
			Principal		Interest		commitments (2) (3) (4)		commitments (5)		obligations (6)
	Year Ending December 31:
	2015		$	1,963	$	37	$	9,271	$	694	$	1,011
	2016		1,900		100		223		2,323		—
	2017		466		34		—		2,266		—
	2018		—		—		—		2,185		—
	2019		—		—		—		2,024		—
	2020 and beyond		—		—		—		5,067		—
	Future minimum payments		$	4,329	$	171	$	9,494	$	14,559	1,011
	Less: amount representing interest										(10		)
	Present value of capital lease obligations										$	1,001
	-1	In November 2014, the Company entered into a settlement agreement with Versata and agreed to make payments of $0.5 million starting on January 31, 2015 and every three months thereafter to January 2017.
	(2) Unconditional purchase commitments includes the financing arrangement that the Company entered into in 2014, for the purchase of storage equipment, primarily for the Company's data centers. The principal amount financed is $3.8 million and is payable in two installments of $2.6 million and $1.2 million in three months and one year, respectively, from November 2014.
	-3	Unconditional purchase commitments includes indemnity holdback payables for Clicktools Ltd. and LeadRocket, Inc.
	(4) Unconditional purchase commitments includes $2.7 million for leasehold improvements for the Company's headquarters.
	-5	The Company has facilities under several non-cancellable operating lease agreements that expire at various dates through 2018. The Company's rent expense for the years ended December 31, 2014, 2013 and 2012 was $2.1 million, $1.9 million and $1.5 million, respectively.
	-6	The Company entered into non-cancellable capital leases with various expiration dates.
	-7	The above table does not include the Wells Fargo Revolver, because the Company was unable to make a reasonably reliable estimate of the amount and period in which the Revolver will be paid.
	Included in non-current deposits and other assets in the consolidated balance sheets at December 31, 2014 and 2013 is restricted cash and rental deposits totaling $0.2 million and $0.5 million, respectively,related to security deposits on leased facilities and a customer letter of credit. The restricted cash represents investments in certificates of deposit and secured letters of credit required by landlords to meet security deposit requirements for the leased facilities.
	As of December 31, 2014, the liability for uncertain tax positions was $3.0 million including interest. Due to the high degree of uncertainty regarding the timing of potential future cash flows associated with these liabilities, the Company is unable to make a reasonably reliable estimate of the amount and period in which these liabilities might be paid.
	In October 2014, the Company entered into a sublease agreement ("Sublease") with Oracle America, Inc. (“Sublandlord”) for office space located at 4140 Dublin Boulevard, Dublin, California 94568 ("Subleased Premises"), to replace the Company’s current corporate headquarters.
	The term of the Sublease commences in February 2015, when the Sublandlord delivers possession of the Subleased Premises to the Company and expires on May 15, 2022. Base rent will be abated from the commencement of the Sublease until November 30, 2015. Thereafter, monthly base rent will be $149,928 for 2015 and increase annually as set forth in the Sublease, up to $184,411 in 2022. The total cash obligation for base rent over the term of the Sublease is approximately $15.1 million, without rent abatement, and is included in the operating lease commitment in the table above. In addition to base rent, the Company will be required to pay its pro rata share of building operating costs including utilities, insurance, repair and personnel costs, along with real estate taxes in excess of the amounts for certain base years.
	Letter of Credit
	The Company obtained a $0.2 million letter of credit in August 2014 for its leased space in Pleasanton, California. The letter of credit will expire on August 31, 2015.
	The Company obtained a $1.1 million letter of credit in October 2014 for its leased space in Dublin, California. The letter of credit will expire on October 1, 2015.
	Warranties and Indemnification
	The Company generally warrants that its software will perform to standard documentation. Under the Company's standard warranty, should a software product not perform as specified in the documentation within the warranty period, it will repair or replace the software or refund the license fee paid. To date, the Company has not incurred any costs related to warranty obligations for its software.
	The Company's product license and on-demand agreements typically include a limited indemnification provision for claims by third parties relating to its intellectual property. To date, the Company has not incurred and has not accrued for any costs related to such indemnification provisions.
	Intellectual Property Litigation
	Versata Software, Inc., Versata Development Group, Inc. and Versata Inc. v. Callidus Software, Inc - Settled
	On July 19, 2012, Versata Software, Inc. and Versata Development Group, Inc. (collectively, “Versata”) filed suit against the Company in the United States District Court for the District of Delaware (“Delaware District Court”). The suit asserted that the Company infringed U.S. Patent Nos. 7,904,326, 7,908,304 and 7,958,024. On May 30, 2013, the Company answered the complaint and filed a counterclaim in the Delaware District Court. The Company's counterclaim asserted that Versata infringed U.S. Patent Nos. 6,269,355, 6,850,924 and 6,473,748. On August 30, 2013, the Company filed petitions with the United States Patent and Trademark Office Patent Trial and Appeal Board (“PTAB”) for covered business method (“CBM”) patent review of U.S. Patent Nos. 7,904,326, 7,908,304 and 7,958,024, which Versata filed responses to on December 12, 2013. The Company also filed a motion with the Delaware District Court on August 30, 2013 to stay the litigation pending completion of the patent review proceedings with the PTAB (“Motion to Stay”). On January 8, 2014, the Company was granted leave by the Delaware District Court to add Versata Inc. (included in the above definition of “Versata”) as a counterclaim defendant. On March 4, 2014, the PTAB instituted covered business method patent review of each of Versata’s patents, namely, U.S. Patent Nos. 7,904,326, 7,908,304 and 7,958,024, finding it more likely than not that the Company would prevail in establishing that the challenged claims were not patentable. After requesting the PTAB to reconsider its decision to institute, which was denied, Versata filed a petition for writ of mandamus with the Court of Appeals for the Federal Circuit (“CAFC”) on April 11, 2014 asking that Court to deny institution of CBM patent review by the PTAB. The CAFC denied Versata’s petition for writ of mandamus on May 5, 2014. On April 17, 2014, the Company filed additional petitions with the PTAB for CBM patent review to address all of the remaining claims not previously covered in the prior petitions with respect to U.S Patent Nos. 7,908,304 and 7,958,024. On May 8, 2014, the Delaware District Court: (i) granted our Motion to Stay in part with respect to U.S. Patent No. 7,904,326, and (ii) denied the Company's Motion to Stay in part with respect to U.S. Patent Nos. 7,908,304 and 7,958,024. On May 8, 2014, the Company appealed to the CAFC the Delaware District Court’s denial of the Motion to Stay with respect to U.S. Patent Nos. 7,908,304 and 7,958,024. On October 2, 2014, the PTAB instituted covered business method patent review of the remaining claims covered in the second set of petitions for U.S Patent Nos. 7,908,304 and 7,958,024. On October 21, 2014, the Company engaged in a mediation with Versata and on November 13, 2014, entered into an agreement with Versata to settle and dismiss the pending district court litigation and patent office proceedings, to extend patent cross-licenses and covenants not to sue to one another, and the Company was appointed as an authorized reseller of certain Versata products. Under the agreement, each party covenanted not to sue the other (and its related entities) for infringement of any patents now owned (including pending patents) or later acquired by either party. In addition, each party granted to the other a fully paid-up, irrevocable, nonexclusive, worldwide license to certain patents (including the patents asserted in the pending district court litigation) for specified products of each party. The agreement also contained a release for any past infringement or claim between the parties and dismissal of the civil pending in the Delaware District Court, as well as the five covered business method patent review proceedings then-pending before the PTAB. Pursuant to the agreement, the Company agreed to pay to Versata $4.5 million in nine equal quarterly installments, commencing on January 31, 2015. The fair value of these payments was $4.3 million, of which the Company recognized a charge to earnings for $2.9 million in 2014 and capitalized $1.4 million for the value of the patent license. The $1.4 million will be amortized to expense over the average life span of the associated patents of approximately 9.5 years. The difference between the installment payment and the fair value will be charged to interest as incurred.
	Callidus Software, Inc. v. Xactly Corporation - Settled
	On August 31, 2012, the Company filed suit against Xactly Corporation (“Xactly”) in the United States District Court for the Central District of California. The suit alleged that Xactly infringed U.S. Patents 8,046,387 and 7,774,378. On October 24, 2012, the Company amended its complaint to add Xactly's President and Chief Executive Officer as a defendant and to add claims for trademark infringement, false advertising, false and misleading advertising, trade libel, defamation, intentional interference with prospective economic advantage, intentional interference with contractual relations, breach of contract and unfair competition, in addition to patent infringement. On January 28, 2013, the Company further amended its complaint to allege that Xactly also infringed U.S. Patent 6,473,748 and dismissed its intentional interference with contractual relations claim. On March 14, 2013, the case was transferred to the United States District Court in the Northern District of California. On May 31, 2013, the Company and Xactly entered into a stipulated dismissal of the Company's trademark infringement claim whereby Xactly agreed that it would not use the Company's trademarks-in-suit in certain of Xactly's marketing and advertising activities going forward. On November 25, 2013, Callidus, Xactly and Xactly's President and Chief Executive Officer entered into a Settlement, Release, and License Agreement that, among other things, included an agreement by Xactly to pay the Company $2.0 million in license fee, which will be paid in four equal annual installments of $0.5 million beginning November 2013. Upon receipt of installment payments, the Company will record the amount under operating expenses as an offset to legal fees.
	TQP Development, LLC v. Callidus Software, Inc. - Settled
	On December 14, 2012, TQP Development, LLC (“TQP”) filed suit against Callidus in the United States District Court for the Eastern District of Texas Marshall Division (“Texas District Court”). The suit asserted that Callidus infringed U.S. Patent No. 5,412,730. The Company filed a petition with the PTAB on October 11, 2013 for covered business method patent review of U.S. Patent No. 5,412,730. On December 2, 2013, the Company entered into a Settlement Agreement with TQP for no monetary consideration. Pursuant to the Settlement Agreement, 1) TQP dismissed, with prejudice, its outstanding suit against the Company in the Texas District Court on December 4, 2013, and 2) the PTAB accepted the parties’ joint motion to terminate the covered business method patent review proceeding on December 11, 2013.
	Other matters
	In addition to the above litigation matters, the Company from time to time is a party to other various litigation and customer disputes incidental to the conduct of its business. At the present time, the Company believes that none of these matters are likely to have a material adverse effect on the Company's future financial results.
	The Company records a liability when it is both probable that a liability has been incurred and the amount of the loss can be reasonably estimated. The Company reviews the need for any such liability on a quarterly basis and records any necessary adjustments to reflect the effect of ongoing negotiations, contract disputes, settlements, rulings, advice of legal counsel, and other information and events pertaining to a particular case in the period they become known. At December 31, 2014, the Company has not recorded any such liabilities in accordance with accounting for contingencies. However, litigation is subject to inherent uncertainties and the Company's view on these matters may change in the future.

Revolving_Line_of_Credit_Notes

Revolving Line of Credit (Notes)	12 Months Ended
	Dec. 31, 2014
Line of Credit Facility [Line Items]
Schedule of Line of Credit Facilities [Table Text Block]	Revolving Line of Credit
	In May 2014, the Company entered into a credit agreement with Wells Fargo Bank, National Association ("Wells Fargo"), under which Wells Fargo agreed to make a revolving loan ("Revolver") to us in an amount not to exceed $10.0 million, with an accordion feature that allows us to increase the maximum borrowing amount by not less than $5.0 million and not more than $10.0 million. In September 2014, the Company increased the maximum borrowing amount to $15.0 million. The Revolver matures in May 2019.
	Pursuant to the agreement, the Company is required to maintain a leverage ratio of 3.00:1.00 and a minimum liquidity of $7.5 million.
	Outstanding borrowings under the Revolver bear interest, at the Company's option, at a base rate plus an applicable margin. The applicable margin ranges between 0.75% and 2.25% depending on the Company's leverage ratio. A fee of 0.25% per annum is payable with respect to the unused portion of the commitment. Interest is payable every three months. As of December 31, 2014 the Company had borrowed $10.5 million under the Revolver. The carrying value of total debt approximates fair market value. Interest rate at December 31, 2014 was 2%.

Net_Loss_Per_Share

Net Loss Per Share	12 Months Ended
	Dec. 31, 2014
Earnings Per Share [Abstract]
Net Loss Per Share	Net Loss Per Share
	Basic net loss per share is calculated by dividing net loss for the period by the weighted average common shares outstanding during the period. Diluted net loss per share is calculated by dividing the net loss for the period by the weighted average common shares outstanding, adjusted for all dilutive potential common shares, which includes shares issuable upon the conversion of the Convertible Notes, the exercise of outstanding common stock options, the release of restricted stock, and purchases of shares under the Employee Share Purchase Plan (ESPP) to the extent these shares are dilutive. For 2014, 2013 and 2012, the diluted net loss per share calculation was the same as the basic net loss per share calculation as all potential common shares were anti-dilutive.
	Diluted net loss per share does not include the effect of the following potential weighted average common shares because to do so would be anti-dilutive for the periods presented (in thousands):
		Years Ended December 31,
		2014	2013	2012
	Restricted stock	2,379	1,918	3,543
	Stock options	1,630	2,490	3,299
	ESPP	39	42	67
	Convertible notes	829	7,129	7,680
	Total	4,877	11,579	14,589
	The weighted average exercise price of stock options excluded for 2014, 2013 and 2012 was $4.09, $4.42 and $4.74, respectively.

StockBased_Compensation

Stock-Based Compensation	12 Months Ended
	Dec. 31, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock-Based Compensation	Stock-Based Compensation
	Stockholder-Approved Stock Option and Incentive Plans
	In June 2013, the 2013 Stock Incentive Plan ("2013 Plan") became effective upon the approval of the Company's Board of Directors and stockholders, and as a result, the 2003 Stock Incentive Plan ("2003 Plan") was expired and replaced. All outstanding shares available for grant under the 2003 Plan expired upon the adoption of the 2013 Plan.
	The Company was authorized to issue 3,469,500 shares of common stock under the 2013 Plan. Under the 2013 plan, the Company's Board of Directors (or an authorized subcommittee) may grant stock options or other types of stock awards, such as restricted stock, restricted stock units, stock bonus awards or stock appreciation rights. Incentive stock options may be granted only to the Company's employees. Nonstatutory stock options and other stock-based awards may be granted to employees, consultants or non-employee directors. These options vest as determined by the board of directors (or an authorized subcommittee), generally over four years. The restricted stock units also vest as determined by the board, generally over three years.
	Shares Available for Grant
	A summary of the Company's shares available for grant and the status of options and awards are as follows:
		Years Ended December 31,
		2014			2013			2012
		(Number of Shares)
	Beginning Available	2,478,798			2,578,940			2,014,218
	Authorized	—			3,469,500			1,756,431
	Granted	(1,913,499	)		(2,024,798	)		(2,519,851	)
	Cancelled	383,549			1,335,591			1,328,142
	Expired	(178,337	)		(2,880,435	)		—
	Ending Available	770,511			2,478,798			2,578,940
	Expense Summary
	Stock-based compensation expenses of $11.8 million, $10.4 million and $13.7 million was recorded during the years ended December 31, 2014, 2013 and 2012, in the consolidated statement of comprehensive loss. The table below sets forth a summary of stock-based compensation expense for the years ended December 31, 2014, 2013 and 2012 (in thousands).
		Years Ended December 31,
		2014				2013				2012
	Stock-based compensation:
	Stock Options	$	790			$	866			$	838
	Restricted Stock Units
	Performance-based Awards	2,370				1,097				444
	Service-based Awards	7,705				7,835				11,571
	ESPP	948				597				802
	Total stock-based compensation	$	11,813			$	10,395			$	13,655
	The table below sets forth the functional classification of stock-based compensation expense for the years ended December 31, 2014, 2013 and 2012 (in thousands):
		Years Ended December 31,
		2014				2013				2012
	Stock-based compensation:
	Cost of recurring revenue	$	911			$	783			$	1,550
	Cost of services and other revenue	1,026				1,060				2,070
	Sales and marketing	3,518				2,420				3,778
	Research and development	2,012				1,797				1,782
	General and administrative	4,346				4,335				4,475
	Total stock-based compensation	$	11,813			$	10,395			$	13,655
	Determination of Fair Value
	The fair value of service-based awards is estimated based on the market value of the Company’s stock on the date of grant. A portion of the performance-based awards granted during 2014 are based on relative stockholder return and therefore are subject to a market condition. As a result, the fair value of performance awards is calculated using a Monte Carlo simulation model that estimates the distribution of the potential outcomes of the grants of performance awards based on simulated future index of the peer companies.
	The fair value of each stock option is estimated on the date of grant and the fair value of each ESPP share is estimated on the beginning date of the offering period using the Black-Scholes-Merton valuation model and the assumptions noted in the following table.
		Years Ended December 31,
		2014		2013		2012
	Stock Option Plans
	Expected life (in years)	—		5.0 to 6.1		5.0 to 6.0
	Risk-free interest rate	—		1.41% to 1.93%		0.72% to 1.33%
	Volatility	—		61% to 63%		60% to 65%
	Dividend Yield	—		—		—
	Employee Stock Purchase Plan
	Expected life (in years)	0.5 to 1.0		0.5 to 1.0		0.5 to 1.0
	Risk-free interest rate	0.05% to 0.12%		0.08% to 0.17%		0.13% to 0.20%
	Volatility	47% to 50%		41% to 62%		56% to 62%
	Dividend Yield	—		—		—
	Expected Dividend Yield—The Company has never paid dividends and do not expect to pay dividends.
	Risk-Free Interest Rate—The risk-free interest rate was based on the implied yield currently available on U.S. Treasury zero-coupon issues with a remaining term equivalent to the expected term.
	Expected Term—Expected term represents the period that the Company's stock-based awards are expected to be outstanding. The Company's assumptions about the expected term have been based on historical experience, giving consideration to the contractual terms of the stock-based awards, vesting schedules and expectations of future employee behavior as influenced by changes to the terms of its stock-based awards. The expected term for stock options was estimated using the simplified method allowed under SEC guidance.
	Expected Volatility—Expected volatility is based on the historical volatility over the expected term.
	Stock Options
	As of December 31, 2014, the Company had $1.8 million of unrecognized compensation expense, net of forfeitures, which it expects to recognize over a weighted average period of 2.5 years. No stock options were granted during the year ended December 31, 2014. For the years ended December 31, 2013, the weighted-average fair value of stock options granted by the Company was $3.87 per share. The total intrinsic value of stock options exercised was $5.9 million, $6.2 million and $1.4 million for 2014, 2013 and 2012, respectively. The total cash received from employees as a result of stock option exercises was $2.9 million, $5.1 million and $3.7 million for 2014, 2013 and 2012, respectively.
	Stock option activity is summarized below:
		Number of			Weighted				Weighted		Aggregate
		Shares			Average				Average		Intrinsic Value
					Exercise Price				Remaining		(in thousands)
									Contractual
									Term (Years)
	Outstanding as of December 31, 2011	4,403,003			$	4.71
Granted	120,200			5.86
Exercised	(714,820	)		5.16						$	1,358
Forfeited	(134,346	)		3.52
Expired	(638,555	)		7.64
Outstanding as of December 31, 2012	3,035,482			4.09
Granted	815,500			6.79
Exercised	(1,427,456	)		3.54						6,151
Forfeited	(108,306	)		5.1
Expired	(367,006	)		5.3
Outstanding as of December 31, 2013	1,948,214			5.34
Granted	—			—
Exercised	(701,220	)		4.09						5,940
Forfeited	(44,407	)		7.4
Expired	(26,626	)		10.17
Outstanding as of December 31, 2014	1,175,961			$	5.89			5.99		$	12,278
Vested and Expected to Vest as of December 31, 2014	1,100,528			$	5.82			5.83		$	11,566
Exercisable as of December 31, 2014	730,899			$	5.33			4.6		$	8,039
As of December 31, 2014, the range of exercise prices and weighted average remaining contractual life of outstanding options are as follows:
				Options Outstanding						Options Exercisable
Range of Exercise Prices	Number of			Weighted Average Remaining		Weighted Average				Number of		Weighted
	Shares			Contractual Life		Exercise Price				Shares		Average
				(Years)								Exercise Price
$3.11 - $4.14	133,132			0.53		$	3.63			133,132		$	3.63
$4.15 - $4.15	140,000			0.92		4.15				140,000		4.15
$4.31 - $5.27	140,061			5.53		4.93				109,695		5.03
$5.70 - $5.70	60,000			1.42		5.7				60,000		5.7
$6.01 - $6.01	122,000			8.41		6.01				48,291		6.01
$6.25 - $6.42	80,700			8.37		6.26				79,900		6.26
$6.59 - $6.59	231,407			8.49		6.59				70,989		6.59
$6.67 - $6.74	42,334			8.5		6.67				14,604		6.67
$7.69 - $7.69	207,327			8.66		7.69				68,622		7.69
$9.17 - $10.35	19,000			8.8		9.98				5,666		9.96
$3.11 - $10.35	1,175,961			5.99		$	5.89			730,899		$	5.33
Restricted Stock Units
As of December 31, 2014, the Company had $16.1 million of unrecognized compensation expense, net of forfeitures, which it expect to recognize over a weighted average period of 1.7 years.
Restricted stock unit activity is summarized below:
	Number of			Weighted		Aggregate
	Shares			Average		Intrinsic Value
				Remaining		(in thousands)
				Contractual
				Term (Years)
Unreleased as of December 31, 2011	3,859,292
Granted	2,399,651
Released	(2,597,880	)
Forfeited	(551,380	)
Unreleased as of December 31, 2012	3,109,683
Granted	1,209,298
Released	(1,754,872	)
Forfeited	(856,695	)
Unreleased as of December 31, 2013	1,707,414
Granted	1,913,499
Released	(736,269	)
Forfeited	(183,607	)
Unreleased as of December 31, 2014	2,701,037			1.02		$	43,487
Vested and Expected to Vest as of December 31, 2014	2,700,828			1.02		$	40,169
Restricted stock units granted to employees are not considered outstanding at the time of grant, as the holders of these units are not entitled to dividends and voting rights. Unvested restricted stock units are not considered outstanding in the computation of basic net loss per share.
Performance-based Awards
The Company includes performance-based award activity with restricted stock units.
In 2014 the Company granted performance-based awards with vesting contingent on absolute SaaS revenue growth over the three year period from 2014 to 2016, and the Company's relative total shareholder return over the three year period from 2014 through 2016 versus an index of 17 SaaS companies. In 2014, $1.9 million of expense, net of forfeiture, was recognized.
In 2013, the Company granted performance-based awards with vesting contingent on successful attainment of pre-set SaaS revenue growth and recurring revenue gross profit target. In 2014 $0.5 million expense, net of forfeiture, was recognized.
Employee Stock Purchase Plan
The Company's Employee Stock Purchase Plan (ESPP), which was adopted in 2003 and amended and restated in 2013, qualifies as an "employee stock purchase plan" under Section 423 of the Internal Revenue Code. The ESPP is designed to enable eligible employees to purchase shares of the Company's common stock at a discount on a periodic basis through payroll deductions. Each offering period under the ESPP covers 12 months and consists of two consecutive six-month purchase periods. The purchase price for shares of common stock purchased under the ESPP is 85% of the lesser of the fair market value of the Company's common stock on the first day of the applicable offering period and the fair market value of the Company's common stock on the last day of each purchase period. The Company issued approximately 319,000, 435,000 and 407,000 shares during the years ended December 31, 2014, 2013 and 2012 under the ESPP. The weighted-average fair value of stock purchase rights granted under the ESPP during 2014, 2013 and 2012 was $3.59 per share, $1.96 per share and $1.76 per share, respectively.
As of December 31, 2014, the Company had $0.5 million of unrecognized compensation expense related to ESPP subscriptions that will be recognized over 0.6 years.

Stockholders_Equity

Stockholders' Equity	12 Months Ended
	Dec. 31, 2014
Stockholders' Equity Note [Abstract]
Stockholders' Equity	Stockholders' Equity
	Preferred Stock
	The Company's certificate of incorporation authorizes 5,000,000 shares of undesignated preferred stock with a par value of $0.001, of which no shares were outstanding as of December 31, 2014 and 2013.

Income_Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes
	The following is a geographical breakdown of consolidated loss before income taxes by income tax jurisdiction (in thousands):
		2014			2013			2012
	United States	$	(11,557	)	$	(20,675	)	$	(27,796	)
	Foreign	1,008			1,319			486
	Total	$	(10,549	)	$	(19,356	)	$	(27,310	)
	The provision for income taxes for 2014, 2013 and 2012 consists of the following (in thousands):
		2014			2013			2012
	Current:
	Federal	$	(25	)	$	—		$	4
	State	3			—			—
	Foreign	1,138			1,815			559
	Deferred:
	Federal	78			159			(185		)
	State	(89		)	—			(22		)
	Foreign	(93		)	81			32
	Total provision for income taxes	$	1,012		$	2,055		$	388
	The decrease in provision for income taxes in 2014 from 2013 was primarily due to a net decrease in foreign withholding taxes offset by an increase in income taxes in foreign jurisdiction.
	The provision for income taxes differs from the expected tax benefit computed by applying the statutory federal income tax rates to consolidated loss before income taxes as follows (in thousands):
		Year Ended December 31,
		2014			2013			2012
	Federal tax at statutory rate	$	(3,587	)	$	(6,581	)	$	(9,286	)
	State taxes, net of benefit	3			—			—
	Non-deductible expenses	453			1,248			2,416
	Foreign taxes	703			1,447			427
	Current year net operating losses and other deferred tax assets for which no benefit has been recognized	4,828			7,320			7,181
	Research and experimentation credit	(1,239		)	(1,379		)	—
	Tax benefit due to the recognition of acquired deferred tax liabilities	(149		)	—			(350		)
	Total provision for income taxes	$	1,012		$	2,055		$	388
	Deferred income taxes reflect the net tax effect of temporary differences between the carrying amount of assets and liabilities for financial reporting purposes and the amount used for income tax purposes. Net deferred tax assets consist of the following (in thousands):
		As of December 31,
		2014			2013
	Deferred tax assets
	Net operating loss carryforwards	$	54,712		$	53,902
	Accrued expenses	5,420			2,161
	Unrealized gain/loss on investments	916			915
	Research and experimentation credit carryforwards	12,609			10,884
	Capitalized research and experimentation costs	14,072			18,100
	Deferred stock compensation	3,956			2,223
	Gross deferred tax assets	91,685			88,185
	Less valuation allowance	(90,598		)	(86,604		)
	Total deferred tax assets, net of valuation allowance	1,087			1,581
	Deferred tax liabilities
	Property and equipment and intangibles	(1,699		)	(1,602		)
	Goodwill	(1,024		)	(887		)
	Net deferred tax liabilities	$	(1,636	)	$	(908	)
	In assessing the realizability of deferred tax assets, management considers whether it is more likely than not that some portion or all of the deferred tax assets will be realized. The ultimate realization of deferred tax assets is dependent upon the generation of future taxable income during the periods in which those temporary differences become deductible. Based on the level of historical taxable income and projections for future taxable income over the period in which the temporary differences are deductible, the Company recorded a valuation allowance against the deferred tax assets for which it believes it is not more likely than not to be realized. As of December 31, 2014 and 2013, a valuation allowance has been recorded on all deferred tax assets, except the deferred tax assets related to two of its foreign subsidiaries, based on the analysis of profitability for those subsidiaries.
	The net changes for valuation allowance for years ended December 31, 2014 and 2013 were an increase of $4.0 million and $7.8 million, respectively.
	The Company recorded approximately $0.9 million and no additional net deferred tax liabilities related to the various acquisitions completed during 2014 and 2013, respectively. The additional deferred tax liabilities create a new source of taxable income, thereby requiring the Company to release a portion of its deferred tax asset valuation allowance with a related reduction in income tax expense.
	As of December 31, 2014, the Company had net operating loss carryforwards for federal and California income tax purposes of $169.0 million and $38.0 million, respectively, available to reduce future income subject to income taxes. The federal net operating loss carryforwards, if not utilized, will expire over 20 years beginning in 2017. The California net operating loss carryforward, began to expire in 2014.
	Not included in the deferred income tax asset balance at December 31, 2014 is approximately $8.9 million, which pertains to certain net operating loss carryforwards resulting from the exercise of employee stock options. When recognized, the tax benefit of these losses will be accounted for as a credit to additional paid-in capital rather than a reduction of the income tax provision.
	The Company also has research credit carryforwards for federal and California income tax purposes of approximately $8.4 million and $8.7 million, respectively, available to reduce future income taxes. The federal research credit carryforward, if not utilized, will expire over 20 years beginning in 2019. The California research credit carries forward indefinitely.
	Federal and California tax laws impose restrictions on the utilization of net operating loss and tax credit carryforwards in the event of an ownership change, as defined in Section 382 of the Internal Revenue Code. The Company's ability to utilize its net operating loss and tax credit carryforwards are subject to limitations under these provisions.
	The Company has not provided for federal income taxes on all of the non-U.S. subsidiaries' undistributed earnings as of December 31, 2014 of $2.7 million, because such earnings are intended to be indefinitely reinvested. The residual U.S. tax liability, if such amounts were remitted, would be nominal.
	The activity related to the Company's unrecognized tax benefits is set forth below (in thousands):
		Amount
	Balance at January 1, 2013	$	2,478
	Increases related to prior year tax positions	175
	Increases related to current year tax positions	222
	Reductions to unrecognized tax benefits as a result of a lapse of applicable statute of limitations	(32		)
	Balance at December 31, 2013 (1)	2,843
	Increases related to prior year tax positions	(44		)
	Increases related to current year tax positions	270
	Reductions to unrecognized tax benefits as a result of a lapse of applicable statute of limitations	(32		)
Balance at December 31, 2014 (2)	$	3,037
(1) $2.6 million million of the unrecognized tax benefits reduced deferred tax assets and $0.3 million was included in accrued expenses on the consolidated balance sheet.
(2) $2.7 million of the unrecognized tax benefits reduced deferred tax assets and $0.3 million was included in accrued expenses on the consolidated balance sheet.
If recognized, $0.3 million of the unrecognized tax benefits at December 31, 2014 would reduce the Company's annual effective tax rate. The Company also accrued potential penalties and interest of $0.1 million related to these unrecognized tax benefits during 2014, and in total, as of December 31, 2014, the Company recorded a liability for potential penalties and interest of $0.2 million. The Company recognized interest and penalties related to unrecognized tax benefits within the income tax expense line in the accompanying consolidated statement of comprehensive loss. Accrued interest and penalties are included within the related tax liability line in the consolidated balance sheet. The Company classified the unrecognized tax benefits as a noncurrent liability, as the Company does not expect any payment of incremental taxes over the next 12 months. The Company also does not expect its unrecognized tax benefits to change significantly over the next 12 months.
The Company files U.S., state, and foreign income tax returns in jurisdictions with varying statutes of limitations. All tax years generally remain subject to examination by federal and most state tax authorities. In foreign jurisdictions, the 2004 through 2014 tax years generally remain subject to examination by their respective tax authorities.

Employee_Benefit_Plan

Employee Benefit Plan	12 Months Ended
	Dec. 31, 2014
Compensation and Retirement Disclosure [Abstract]
Employee Benefit Plan	Employee Benefit Plan
	In 1999, the Company established a 401(k) tax-deferred savings plan ("401(k) plan"), whereby eligible employees may contribute a percentage of their eligible compensation up to the maximum allowed under IRS rules. The Company's contributions are discretionary, and no such contributions have been made since the inception of this plan up until December 31, 2011. Beginning January 1, 2012, the Company contributed 50% of each dollar that an employee contributed to their 401(k) plan up to a maximum of $1,000 annually, and the vesting of the Company's contributions is based on years of service. During the years ended December 31, 2014 and 2013, the Company recognized approximately $272,000 and $220,000, respectively in expense related to the 401(k) plan match.

Segment_Geographic_and_Custome

Segment, Geographic and Customer Information	12 Months Ended
	Dec. 31, 2014
Segment Reporting [Abstract]
Segment, Geographic and Customer Information	Segment, Geographic and Customer Information
	The accounting principles guiding disclosures about segments of an enterprise and related information establishes standards for the reporting by business enterprises of information about operating segments, products and services, geographic areas, and major customers. The method of determining which information is reported is based on the way that management organizes the operating segments within the Company for making operational decisions and assessments of financial performance. The Company's chief operating decision maker is considered to be the Company's chief executive officer (CEO). The CEO reviews financial information presented on a consolidated basis for purposes of making operating decisions and assessing financial performance. By this definition, the Company operates in one reportable segment, which is the development, marketing and sale of enterprise software and related services.
	The following table summarizes revenue for the years ended December 31, 2014, 2013 and 2012 by geographic areas (in thousands):
		2014		2013		2012
	United States	$	106,194	$	88,684	$	74,477
	EMEA	15,162		12,241		11,578
	Asia Pacific	8,400		5,379		4,943
	Other	6,862		6,033		3,954
		$	136,618	$	112,337	$	94,952
	No individual country, outside of the U.S. accounted for more than 10% of the Company's property, plant and equipment as of December 31, 2014 and 2013.
	As of December 31, 2014, the Company's goodwill balance was $47.0 million, of which $11.4 million was located in U.K. (EMEA) and intangible asset balance of $17.8 million, and $2.5 million was located in U.K. (EMEA). No individual country, outside the U.S. accounted for more than 10% of goodwill and intangible asset balance as of December 31, 2013.
	In 2014, 2013 and 2012, no customer accounted for more than 10% of total revenue.

Related_Party_Transactions

Related Party Transactions	12 Months Ended
	Dec. 31, 2014
Related Party Transactions [Abstract]
Related Party Transactions	Related Party Transactions
	In June 2013, in the normal course of business, the Company entered into agreements with Lithium Technologies, Inc. (“Lithium”). The Chief Financial Officer of Lithium is a member of the Company's Board of Directors. The Company purchased an annual subscription for Lithium's social media management solutions in the amount of $120,000 and renewed in 2014. During 2013 and 2014, the Company paid the entire annual fee of $120,000 in each year, for Lithium’s social media management solution. For the 2013 fee, $62,000 was expensed in 2013 and $58,000 was expensed in 2014. For the 2014 fee, $62,000 was expensed in 2014 and $58,000 was included in prepaid expenses in current assets, as of December 31, 2014. In 2013, Lithium entered into a two-year web hosting agreement with the Company in the amount of $113,000. During 2013, the Company recognized approximately $52,000 in revenue under this agreement. In addition, during 2013, the Company entered into an agreement with Lithium in the amount of $143,550 under which it provided professional services, of which approximately $120,000 was recognized in 2013 and the remaining balance of $23,550 was recognized in 2014.
	In 2014, the Company purchased a one-time annual subscription from Lithium for Social Success Services for $40,000, which amount was paid in full in October 2014. As of December 31, 2014, $17,000 of this amount was expensed and $23,000 was included in prepaid expenses. Also in 2014, the Company purchased an annual subscription from Lithium for Community Administration for $45,000, which was paid in full in January 2015.
	Webcom Inc., a wholly-owned subsidiary of the Company, uses the services of a third-party vendor to perform product modeling and maintenance of certain equipment. The third-party vendor is owned by a relative of Webcom's senior management. For the year ended December 31, 2014 and 2013, the Company paid approximately $149,000 and $143,000, respectively, to this vendor.

The_Company_and_Significant_Ac1

The Company and Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Holdback Payable [Policy Text Block]	Holdback Payable
	The Company estimates the fair value of an indemnity holdback payable based on the contract value. The terms of the holdback payable includes standard representations and warranties.
Contingent Consideration [Policy Text Block]	Contingent Consideration
	The Company estimates the fair value of the contingent consideration issued in business combinations using a probability-based income approach. The fair value of the Company liability-classified contingent consideration is remeasured at each reporting period, with any changes in the fair value recorded as income or expense. Contingent acquisition consideration payable is included in accrued liabilities on the Company's consolidated balance sheets.
Business Description and Basis of Presentation [Text Block]	Description of Business
	Callidus Software Inc. (referred to herein as "CallidusCloud", "Callidus", "we" and "our") is a provider of sales and marketing effectiveness software. The Company provides organizations with a complete suite of Lead-to-Money solutions that identify the right leads, ensure proper territory and quota distribution, train sales forces, automate quote and proposal generation, and streamline sales compensation.
Principles of Consolidation	Principles of Consolidation
	The consolidated financial statements include the accounts of Callidus Software, Inc. and its wholly-owned subsidiaries (collectively, the Company), which include wholly-owned subsidiaries in Australia, Canada, Germany, Hong Kong, India, Malaysia, Mexico, New Zealand, Serbia, Singapore, Japan and the United Kingdom. All intercompany transactions and balances have been eliminated in the consolidation.
Use of Estimates	Use of Estimates
	The consolidated financial statements are prepared in accordance with U.S. generally accepted accounting principles ("GAAP") as set forth in the Financial Accounting Standards Board’s ("FASB") Accounting Standards Codification ("ASC") and consider the various staff accounting bulletins and other applicable guidance issued by the U.S. Securities and Exchange Commission ("SEC"). These accounting principles require us to make certain estimates, judgments and assumptions. The Company believes that the estimates, judgments and assumptions upon which the Company relies are reasonable based upon information available to us at the time that these estimates, judgments and assumptions are made. These estimates, judgments and assumptions can affect the reported amounts of assets and liabilities as of the date of the financial statements as well as the reported amounts of revenues and expenses during the periods presented. To the extent there are differences between these estimates, judgments or assumptions and actual results, the Company's consolidated financial statements will be affected. In many cases, the accounting treatment of a particular transaction is specifically dictated by GAAP and does not require management’s judgment in its application. There are also areas in which management’s judgment in selecting among available alternatives would not produce a materially different result.
	In addition, illiquid credit markets, volatile equity and foreign currency markets by companies have contributed to the increase in uncertainty in management estimates and assumptions. Also, future events, such as changes in economic environment, cannot be determined with precision, which would cause actual results to differ materially from management's estimates. Such changes in estimates will be reflected in the consolidated financial statements in future periods.
Foreign Currency Translation	Foreign Currency Translation
	The Company transact business in various foreign currencies. In general, the functional currency of a foreign operation is the local country’s currency. Accordingly, the foreign currencies are translated into U.S. Dollars using exchange rates in effect at period end for assets and liabilities and average rates during each reporting period for the results of operations. Adjustments resulting from the translation of the financial statements of the foreign subsidiaries are reported as a separate component of accumulated other comprehensive income (loss). Foreign currency transaction gains and losses are included in interest and other income (expense), net in the accompanying consolidated statements of comprehensive loss.
Cash and Cash Equivalents and Investments	Cash and Cash Equivalents and Investments
	The Company considers all highly liquid instruments with an original maturity on the date of purchase of three months or less to be cash equivalents. Cash equivalents as of December 31, 2014 and 2013 consisted of money market funds. The Company determines the appropriate classification of investment securities at the time of purchase and re-evaluates such designation as of each balance sheet date. As of December 31, 2014 and 2013, all investment securities were designated as "available-for-sale". The Company considers available-for-sale securities that have a maturity date longer than three months to be short-term investments, including those investments with a maturity date of longer than one year that are highly liquid and for which the Company does not have a positive intent to hold to maturity. These securities are carried at estimated fair value based on quoted market prices or other readily available market information, with the unrealized gains and losses included in other comprehensive income (loss). Recognized gains and losses are included in the consolidated statement of comprehensive loss. When the Company has determined that an other-than-temporary decline in fair value has occurred, the amount of the decline is recognized in earnings. Gains and losses are determined using the specific identification method.
Fair Value of Financial Instruments and Concentrations of Credit Risk	Fair Value of Financial Instruments and Concentrations of Credit Risk
	The fair value of certain of the Company's financial instruments that are not measured at fair value, including accounts receivable and accounts payable, approximates the carrying amount due to their short maturity. See Note 6 for discussion regarding the valuation of the Company's investments. Financial instruments that potentially subject us to concentrations of credit risk are short-term investments and trade receivables. The Company mitigates concentration of risk by monitoring the risk profiles of all bank counterparties on at least a quarterly basis. Based on the on-going assessment of counterparty risk, the Company will adjust its exposure to various counterparties.
	The Company's customer base consists of businesses throughout the Americas, Europe, Middle East, Africa and Asia-Pacific. The Company performs ongoing credit evaluations of its customers and generally does not require collateral on accounts receivable. As of December 31, 2014 and 2013, the Company had no customers comprising greater than 10% of net accounts receivable or total revenue. Refer to Note 16 for information regarding revenue by geographic areas.
	In May, 2014, the Company entered into a credit agreement with Wells Fargo Bank, National Association ("Wells Fargo"), under which Wells Fargo agreed to make a revolving loan ("Revolver") to us in an amount not to exceed $10.0 million, with an accordion feature that allows the Company to increase the maximum borrowing amount by not less than $5.0 million and not more than $10.0 million. The Revolver matures in May 2019. Outstanding borrowings under the Revolver bear interest, at the Company's option, at a base rate plus an applicable margin. The applicable margin ranges between 0.75% and 2.25% depending on the Company's leverage ratio. Interest is payable every three months. In September 2014 the Company exercised the accordion feature and increased the maximum amount of borrowing to $15.0 million. As of December 31, 2014 the Company had borrowed $10.5 million under the Revolver. The carrying value of total debt approximates fair market value.
Allowance for doubtful accounts and service remediation reserve	Allowance for Doubtful Accounts
	The Company reduces gross trade accounts receivable with its allowance for doubtful accounts. The allowance for doubtful accounts is the Company's estimate of the amount of probable credit losses in existing accounts receivable. Management analyzes accounts receivable and historical bad debt experience, customer creditworthiness, current economic trends and changes in customer payment history when evaluating the adequacy of the allowance for doubtful accounts. Provisions to the allowance for doubtful accounts are recorded in general and administrative expenses.
	Below is a summary of the changes in the Company's allowance for doubtful accounts for 2014, 2013 and 2012 (in thousands):
		Balance at Beginning of Year		Additions (charges to expense)		Deductions			Balance at
									End of Year
	Allowance for doubtful accounts
	Year ended December 31, 2014	$	650	$	996	$	(583	)	$	1,063
	Year ended December 31, 2013	481		830		(661		)	650
	Year ended December 31, 2012	225		434		(178		)	481
Property and Equipment, net	Property and Equipment, net
	Property and equipment, net is stated at cost, net of accumulated depreciation. Depreciation is calculated using the straight-line method over the estimated useful lives of the respective assets, generally three to five years. Leasehold improvements are amortized over the lesser of the assets' estimated useful lives or the related lease terms. Expenditures for maintenance and repairs are expensed as incurred. Cost and accumulated depreciation of assets sold or retired are removed from the respective property accounts and any resulting gain or loss is reflected in the consolidated statements of comprehensive loss.
Prepaid and other current assets and deposits and other assets	Prepaid and Other Current Assets and Deposits and Other Assets
	Included in prepaid and other current assets and deposits and other in long-term assets in the consolidated balance sheets at December 31, 2014 and 2013 is restricted cash totaling $0.2 million and $0.5 million, respectively, primarily related to security deposits on leases of the Company's facilities. The restricted cash represents investments in certificates of deposit required by landlords to meet security deposit requirements for the leased facilities. Restricted cash is included in prepaid and other current assets in short-term assets and deposits and other assets in long-term assets based on the contractual term for the release of the restriction.
Goodwill, Intangible Assets, Long-Lived Assets and Impairment Assessments	Goodwill, Intangible Assets, Long-Lived Assets and Impairment Assessments
	Goodwill represents the excess of the purchase price over the fair value of net assets acquired in connection with business combinations. Goodwill is not amortized, but instead goodwill is required to be tested for impairment annually and under certain circumstances. The Company performs such testing of goodwill in the fourth quarter of each year, or as events occur or circumstances change that would more likely than not reduce the fair value of a reporting unit below its carrying amount.
	The Company conducts a two-step test for impairment of goodwill. The first step of the test for goodwill impairment compares the fair value of the applicable reporting unit with its carrying value. If the fair value of a reporting unit is less than the reporting unit's carrying value, the Company will perform the second step of the test for impairment of goodwill. During the second step of the test for impairment of goodwill, the Company will compare the implied fair value of the reporting unit's goodwill with the carrying value of that goodwill. If the carrying value of the goodwill exceeds the calculated implied fair value, the excess amount will be recognized as an impairment loss. The Company has one reporting unit and evaluates goodwill for impairment at the entity level. Based upon the results of the step one testing, the Company concluded that no impairment existed as December 31, 2014, and did not perform the second step of the goodwill impairment test.
	Intangible assets with finite lives are amortized over their estimated useful lives of one to twelve years. Generally, amortization is based on the higher of a straight-line method or the pattern in which the economic benefits of the intangible asset will be consumed.
	The Company also evaluates the recoverability of its long-lived assets for possible impairment whenever events or circumstances indicate that the carrying amount of such assets may not be recoverable. If such review indicates that the carrying amount of long-lived assets is not recoverable, the carrying amount of such assets is reduced to fair value. There were no impairment charges recorded during the years ended December 31, 2014, 2013 and 2012.
Business Combinations	Business Combinations
	The Company recognizes assets acquired, liabilities assumed, and contingent consideration at their fair value on the acquisition date. The Company’s estimates are inherently uncertain and subject to refinement. As a result, during the measurement period, which may be up to one year from the acquisition date, the Company may record adjustments to the fair value of assets acquired and liabilities assumed, with a corresponding offset to goodwill. Upon the conclusion of the measurement period or final determination of the fair value of assets acquired or liabilities assumed, whichever comes first, any subsequent adjustments are recorded to the Company's consolidated statements of operations. See Note 3 to the Company's consolidated financial statements, for a discussion of the Company's acquisitions during 2014.
	In addition, uncertainties in income tax and tax related valuation allowances assumed in connection with a business combination are initially estimated as of the acquisition date. The Company continues to gather information and evaluate these items and records any adjustments to the preliminary estimates to goodwill when the estimates are within the measurement period. Subsequent to the measurement period, changes to these income tax uncertainties and tax related valuation allowances will affect the Company's provision for income taxes in its consolidated statements of comprehensive loss.
Restructuring Expenses	Restructuring and Other Expenses
	Restructuring and other expenses are comprised primarily of employee termination costs related to headcount reductions, costs related to properties abandoned in connection with facilities consolidation including estimated losses related to excess facilities based upon the Company's contractual obligations, net of estimated sublease income and related write-downs of leasehold improvements. The Company reassess the liability for excess facilities periodically based on market conditions.
Research and Development	Research and Development
	The Company expenses the cost of research and development as incurred. Research and development expenses consist primarily of expenses for research and development staff, the cost of certain third-party service providers and allocated overhead.
Stock-Based Compensation	Stock-Based Compensation
	The Company measures and recognizes compensation expense for stock-based awards made to employees and directors including employee stock options and employee stock purchases under the Company's Employee Stock Purchase Plan ("ESPP") based on estimated fair values on the date of grant using the Black-Scholes option pricing model. Stock-based compensation expense for restricted stock units ("RSU"), relating to both performance and service-based awards, is estimated based on the market value of the Company's stock on the date of grant.
	The Company granted performance-based share award ("PSUs") to select executives and other key employees.  The Company's PSUs are in the form of restricted stock units, the vesting of which is based on achievement of specified company or other goals. In 2014, the Company granted PSUs with vesting contingent on its absolute SaaS revenue growth over the three year period from 2014 to 2016, and the Company's relative total shareholder return over the three year period from 2014 through 2016 compared to an index of 17 SaaS companies. PSU awards based on SaaS revenue growth will, to the extent the performance criteria are achieved, vest on the third anniversary of the grant date. PSU awards based on total shareholder return is recognized as compensation costs over the requisite service period, if rendered, even if the market condition is never satisfied. In determining the fair value of PSUs based on total shareholder return the Company considered the achievement of the market condition in the estimated fair value.
Income Taxes	Income Taxes
	The Company is subject to income and foreign withholding taxes in both the United States and foreign jurisdictions and the Company uses estimates in determining its provision for income taxes. This process involves estimating actual current tax assets and liabilities together with assessing temporary differences resulting from differing treatment of items for tax and accounting purposes. These differences result in deferred tax assets and liabilities, which are recorded on the consolidated balance sheets. Net deferred tax assets are recorded to the extent the Company believes that these assets will more likely than not be realized. In making such determination, all available positive and negative evidence is considered, including scheduled reversals of deferred tax liabilities, projected future taxable income, tax planning strategies and recent financial operations. With the exception of the net deferred tax assets of two of the Company's foreign subsidiaries, it maintained a full valuation allowance against its net deferred tax assets at December 31, 2014 because the Company believes that it is not more-likely-than-not that the gross deferred tax assets will be realized. While the Company has considered future taxable income and ongoing prudent and feasible tax planning strategies in assessing the need for a valuation allowance, in the event the Company was able to determine that it would be able to realize the deferred tax assets in the future, an adjustment to the deferred tax assets would increase net income in the period such determination was made.
	Income tax positions must meet a more-likely-than-not recognition threshold at the effective date to be recognized upon the adoption of accounting for uncertainty in income taxes and in subsequent periods. This interpretation also provides guidance on measurement, derecognition, classification, interest and penalties, accounting in interim periods, disclosure and transition. The Company recognizes interest and penalties related to unrecognized tax benefits in income tax expense in the accompanying consolidated statement of comprehensive loss. Accrued interest and penalties are included in other liabilities.
Revenue Recognition	Revenue Recognition
	The Company generates revenue by providing software applications as a service through on-demand subscription, perpetual and term licenses and related software maintenance, and professional services. Amounts that have been invoiced are recorded in accounts receivable and in deferred revenue or revenue, depending on whether the revenue recognition criteria have been met.
	Recurring Revenue. Recurring revenue, which includes SaaS revenue and maintenance revenue, are recognized as revenue ratably over the stated contractual period. SaaS revenue consists of subscription fees from customers accessing our cloud-based service offerings. Maintenance revenue consists of fees from customers purchasing subscriptions and receiving support for on-premise solutions. The Company also recognizes revenue associated with customers using its products in excess of contracted usage. This customer excess use is primarily attributed to SaaS products and are recorded in SaaS revenue. Revenue related to customer excess use was immaterial during 2014 and 2013.
	Service and Other Revenue. Service and other revenue primarily consist of training, integration, and configuration services. Generally, the Company's professional services arrangements are on a time-and-materials basis. Time and material services are recognized as revenue as the services are rendered based on inputs to the project, such as billable hours incurred. For fixed-fee professional service arrangements, the Company recognizes revenue under the proportional performance method of accounting and estimates the proportional performance on a monthly basis, utilizing hours incurred to date as a percentage of total estimated hours to complete the project. If the Company does not have a sufficient basis to measure progress toward completion, revenue is recognized upon completion. Service and other revenue also includes license revenue from perpetual licenses which are recognized upon delivery of the product, using the residual method, assuming all the other conditions for revenue recognition have been met.
	In certain arrangements with non-standard acceptance criteria, the Company defers the revenue until the acceptance criteria are satisfied. Reimbursements, including those related to travel and out-of-pocket expenses, are included in services and other revenue, and an equivalent amount of reimbursable expenses is included in cost of services and other revenue.
	In general, recurring revenue agreements are entered into for twelve to thirty-six months, and the professional services are performed within nine months of entering into a contract with the customer, depending on the size of integration.
	SaaS agreements provide specified service level commitments, excluding scheduled maintenance. The failure to meet this level of service availability may require the Company to credit qualifying customers a portion of their subscription and support fees. Based on the Company's historical experience meeting its service level commitments, the Company does not currently have any liabilities on its balance sheet for these commitments.
	The Company recognizes revenue when all of the following conditions are met:
	• Persuasive evidence of an arrangement exists;
	• Delivery has occurred or services have been rendered;
	• The fees are fixed or determinable; and
	• Collection of the fees is reasonably assured.
	If the Company determines that any one of the four criteria is not met, it will defer recognition of revenue until all the criteria are met.
	Multiple-deliverable arrangements with on-demand subscription. For on-demand subscription agreements with multiple-deliverables, the Company evaluates each element to determine whether it represents a separate unit of accounting. The Company determines the best estimated selling price of each deliverable in an arrangement based on a selling price hierarchy of methods contained in Financial Accounting Standards Board (“FASB”) Accounting Standards Update (“ASU”) No. 2009-13, Revenue Recognition (Accounting Standards Codification (“ASC”) Topic 605)-Multiple-Deliverable Revenue Arrangements. The best estimated selling price for a deliverable is based on its vendor-specific objective evidence (“VSOE”), if available, third-party evidence (“TPE”), if VSOE is not available, or estimated selling price (“ESP”), if neither VSOE nor TPE is available. Total arrangement fees are allocated to each element using the relative selling price method. The Company has currently established VSOE for most deliverables, except for fixed fee service arrangements.
	The Company considered all of the following factors to establish the ESP for fixed fee service arrangements when sold with its on-demand services: the weighted average actual sales prices of professional services sold on a standalone basis for on-demand services; average billing rate for fixed fee service agreements when sold with on-demand services, cost plus a reasonable mark-up and other factors such as gross margin objectives, pricing practices and growth strategy. The Company is currently using cost plus a reasonable mark-up to establish ESP for fixed fee service.
	Multiple-deliverable arrangements with on-premise license. For arrangements with multiple-deliverables, including license, professional services and maintenance, the Company recognizes license revenue using the residual method of accounting pursuant to the requirements of the guidance contained in ASC 985-605, Software Revenue Recognition. Under the residual method, revenue is recognized when VSOE for fair value exists for all of the undelivered elements in the arrangement, but does not exist for one or more of the delivered elements in the arrangement. If evidence of fair value cannot be established for the undelivered elements, all of the revenue is deferred until evidence of fair value can be established, or until the items for which evidence of fair value cannot be established are delivered. For maintenance and certain professional services, the Company has established VSOE as a consistent number of standalone sales of this deliverable have been priced within a reasonably narrow range. The Company's revenue arrangements generally do not include a general right of return relative to the delivered products.
	For the Company's term-based licenses, included in services and licenses, that are typically bundled with maintenance for the entire duration of the license, if the only undelivered element is maintenance, then the entire amount of revenue is recognized over the maintenance period, as maintenance is not typically sold separately.
	Sales and other taxes collected from customers to be remitted to government authorities are excluded from revenue.
Deferred Revenue	Deferred Revenue
	Deferred revenue consists of invoicing and payments received in advance of revenue recognition and is recognized as the revenue recognition criteria are met. The Company invoices its customers annually, quarterly, or in monthly installments. Deferred revenue that will be recognized during the succeeding twelve month period is recorded as current deferred revenue, and the remaining portion is recorded as non-current deferred revenue.
Cost of Revenues	Cost of Revenue
	Cost of recurring revenue consists primarily of salaries, benefits, allocated overhead costs related to on-demand operations and technical support personnel, as well as allocated amortization of purchased technology. Cost of services revenue consists primarily of salaries, benefits, travel and allocated overhead costs related to consulting, training and other professional services personnel, including cost of services provided by third-party consultants engaged by the Company. Cost of license revenue consists primarily of amortization of purchased technology.
Advertising Costs	Advertising Costs
	The Company expenses advertising costs in the period incurred. Advertising expense was $1.2 million, $227,000, and $146,000 for 2014, 2013 and 2012, respectively.
Comprehensive Income (Loss)	Comprehensive Income (Loss)
	Comprehensive income (loss) is the total of net income (loss), unrealized gains and losses on investments and foreign currency translation adjustments. Unrealized gains and losses on investments and foreign currency translation adjustment amounts are excluded from net loss and are reported in accumulated other comprehensive income (loss) in the accompanying consolidated financial statements.
Recent Accounting Pronouncements	Recent Accounting Pronouncements
	In May 2014, the FASB issued Accounting Standards Update No. 2014-09 (ASU 2014-09) "Revenue from Contracts with Customers." ASU 2014-09 supersedes the revenue recognition requirements in “Revenue Recognition (Topic 605)”, and requires entities to recognize revenue when it transfers promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled to in exchange for those goods or services. ASU 2014-09 is effective for annual reporting periods beginning after December 15, 2016, including interim periods within that reporting period. Early adoption is not permitted. The Company is currently in the process of evaluating the impact of the adoption of ASU 2014-09 on the consolidated financial statements.
Deferred Charges, Policy [Policy Text Block]	Deferred Commissions
	The deferred commissions on the Company's consolidated balance sheets totaled $5.6 million and $4.8 million at December 31, 2014 and December 31, 2013, respectively. As of December 31, 2014 and 2013 $4.2 million and $3.4 million of the deferred commissions are included in prepaid and other current assets in short-term assets with the remaining amounts included in deposits and other assets in long-term assets in the consolidated balance sheets. The deferred costs mainly represent commission payments to the Company's direct sales force for on-demand subscription and maintenance agreements, which the Company amortizes as sales and marketing expense over the non-cancellable term of the contract as the related revenue is recognized. The commission payments are a direct and incremental cost of the revenue arrangements.

The_Company_and_Significant_Ac2

The Company and Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Summary of changes in the Company's reserve accounts	Below is a summary of the changes in the Company's allowance for doubtful accounts for 2014, 2013 and 2012 (in thousands):
		Balance at Beginning of Year		Additions (charges to expense)		Deductions			Balance at
									End of Year
	Allowance for doubtful accounts
	Year ended December 31, 2014	$	650	$	996	$	(583	)	$	1,063
	Year ended December 31, 2013	481		830		(661		)	650
	Year ended December 31, 2012	225		434		(178		)	481

Restructuring_Tables

Restructuring (Tables)	12 Months Ended
	Dec. 31, 2014
Restructuring and Related Activities [Abstract]
Summary of accrued restructuring expenses	The following table sets forth a summary of accrued restructuring expenses for 2014 and 2013 (in thousands):
		December 31,		Additions		Adjustments			Cash Payments			December 31,
		2013										2014
	Severance and termination-related costs	$	141	$	70	$	—		$	(211	)	$	—
	Facilities related costs	234		162		20			(222		)	194
	Total accrued restructuring expenses	$	375	$	232	$	20		$	(433	)	$	194
		December 31,		Additions		Adjustments			Cash Payments			December 31,
		2012										2013
	Severance and termination-related costs	$	589	$	1,706	$	(7	)	$	(2,147	)	$	141
	Facilities related costs	289		—		—			(55		)	234
	Total accrued restructuring expenses	$	878	$	1,706	$	(7	)	$	(2,202	)	$	375

Acquisition_Tables

Acquisition (Tables)	12 Months Ended
	Dec. 31, 2014
Acquisitions
Schedule of intangible assets	Intangible assets consisted of the following as of December 31, 2014 and 2013 (in thousands):
		December 31,				December 31, 2013 Net		Net Additions (1)		Foreign currency translation impact			Amortization Expense			December 31,		Weighted
		2013 Cost														2014 Net		Average
																		Amortization
																		Period (Years)
	Developed technology	$	21,187			$	9,669	$	3,906	$	(53	)	$	(3,271	)	$	10,251	4.1
	Customer relationships	8,154				4076		1,260		(41		)	(1,025		)	4,270		3.6
	Tradenames	1,522				828		686		(25		)	(298		)	1,191		3.6
	Favorable lease	53				—		—		—			—			—		N/A
	Patents and licenses	3,059				2393		—		—			(348		)	2,045		6.7
	Other	142				29		—		—			(29		)	—		N/A
	Total	$	34,117			$	16,995	$	5,852	$	(119	)	$	(4,971	)	$	17,757
	-1	Included in the additions are the intangibles acquired for Clicktools of $3.0 million and LeadRocket of $2.6 million as discussed in Note 3 to the consolidated financial statements and other purchased technology as part of the normal course of operations.
		December 31,				December 31, 2012 Net		Net Additions		Foreign currency translation impact			Amortization Expense			December 31,		Weighted
		2012 Cost														2013 Net		Average
																		Amortization
																		Period (Years)
	Developed technology	$	20,576			$	12,384	$	611	$	—		$	(3,326	)	$	9,669	4.3
	Customer relationships	8,154				4,952		—		—			(876		)	4,076		4.9
	Tradenames	1,522				1,040		—		—			(212		)	828		5.2
	Favorable lease	40				1		13		—			(14		)	—		N/A
	Patents and licenses	3,059				2,744		—		—			(351		)	2,393		7.6
	Other	142				75		—		—			(46		)	29		0.5
	Total	$	33,493			$	21,196	$	624	$	—		$	(4,825	)	$	16,995
LeadRocket [Member]
Acquisitions
Schedule of Business Acquisitions, by Acquisition [Table Text Block]	The purchase price allocation for LeadRocket is summarized as follows (in thousands):
		Fair Value
	Net liabilities assumed	$	(1,224	)
	Intangible assets	2,640
	Goodwill	1,584
	Total purchase price	$	3,000
Schedule of intangible assets	The following table sets forth the components of identifiable intangible assets acquired and their estimated useful lives as of the date of the LeadRocket acquisition (in thousands):
		Fair Value			Useful Life
	Developed technology	570			2-4 years
	Patents	1,060			10 years
	Domain names and trademarks	850			5 years
	Customer relationships	160			3 years
	Total intangible assets subject to amortization	2,640
Clicktools [Member]
Acquisitions
Schedule of Business Acquisitions, by Acquisition [Table Text Block]	The preliminary purchase price allocation for Clicktools is summarized as follows (in thousands):
		Fair Value
	Net liabilities assumed	$	(1,270	)
	Intangible assets	3,000
	Goodwill	14,675
	Total purchase price	$	16,405
Schedule of intangible assets	The following table sets forth the components of identifiable intangible assets acquired and their estimated useful lives as of the date of the Clicktools acquisition (in thousands). The intangible assets are reported in British Pounds and will be translated to U.S. Dollars at December 31, 2014.
		Fair Value				Useful Life
	Developed technology	$	1,300			3 years
	Domain names and trademarks	600				3 years
	Customer relationships	1,100				3 years
	Total intangible assets subject to amortization	$	3,000

Goodwill_and_Intangible_Assets1

Goodwill and Intangible Assets (Tables)	12 Months Ended
	Dec. 31, 2014
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of changes in the carrying amount of goodwill	The changes in the carrying amount of goodwill for the fiscal years ended December 31, 2014 and 2013 are as follows (in thousands):
		Goodwill
	Balance as of December 31, 2012 and 2013	$	31,207
	Acquisitions	16,259
	Foreign currency translation impact	(496		)
	Balance as of December 31, 2014	$	46,970
Schedule of intangible assets	Intangible assets consisted of the following as of December 31, 2014 and 2013 (in thousands):
		December 31,			December 31, 2013 Net		Net Additions (1)		Foreign currency translation impact			Amortization Expense			December 31,		Weighted
		2013 Cost													2014 Net		Average
																	Amortization
																	Period (Years)
	Developed technology	$	21,187		$	9,669	$	3,906	$	(53	)	$	(3,271	)	$	10,251	4.1
	Customer relationships	8,154			4076		1,260		(41		)	(1,025		)	4,270		3.6
	Tradenames	1,522			828		686		(25		)	(298		)	1,191		3.6
	Favorable lease	53			—		—		—			—			—		N/A
	Patents and licenses	3,059			2393		—		—			(348		)	2,045		6.7
	Other	142			29		—		—			(29		)	—		N/A
	Total	$	34,117		$	16,995	$	5,852	$	(119	)	$	(4,971	)	$	17,757
	-1	Included in the additions are the intangibles acquired for Clicktools of $3.0 million and LeadRocket of $2.6 million as discussed in Note 3 to the consolidated financial statements and other purchased technology as part of the normal course of operations.
		December 31,			December 31, 2012 Net		Net Additions		Foreign currency translation impact			Amortization Expense			December 31,		Weighted
		2012 Cost													2013 Net		Average
																	Amortization
																	Period (Years)
	Developed technology	$	20,576		$	12,384	$	611	$	—		$	(3,326	)	$	9,669	4.3
	Customer relationships	8,154			4,952		—		—			(876		)	4,076		4.9
	Tradenames	1,522			1,040		—		—			(212		)	828		5.2
	Favorable lease	40			1		13		—			(14		)	—		N/A
	Patents and licenses	3,059			2,744		—		—			(351		)	2,393		7.6
	Other	142			75		—		—			(46		)	29		0.5
	Total	$	33,493		$	21,196	$	624	$	—		$	(4,825	)	$	16,995
Schedule of future expected amortization	Total future expected amortization is as follows (in thousands):
		Developed			Customer		Tradenames		Patents and
		Technology			Relationships				Licenses
	Year Ending December 31:
	2015	$	2,828		$	1,290	$	382	$	346
	2016	2,741			1,290		353		346
	2017	2,417			1,019		285		346
	2018	1,519			491		96		313
	2019	311			74		32		180
	2020 and beyond	435			106		43		514
	Total expected amortization expense	$	10,251		$	4,270	$	1,191	$	2,045

Financial_Instruments_Tables

Financial Instruments (Tables)	12 Months Ended
	Dec. 31, 2014
Financial Instruments
Schedule of components of the Company's debt and marketable equity securities classified as available-for-sale	The components of the Company's marketable debt securities classified as available-for-sale were as follows at December 31, 2014 (in thousands):
	December 31, 2014	Amortized		Gross		Gross			Estimated
		Cost		Unrealized		Unrealized			Fair value
				Gains		Losses
	Cash	$	27,890	$	—	$	—		$	27,890
	Cash equivalents:
	Money market funds	6,310		—		—			6,310
	Total cash equivalents	6,310		—		—			6,310
	Total cash and cash equivalents	$	34,200	$	—	$	—		$	34,200
	Short-term investments:
	Corporate notes and obligations	2,773		—		(7		)	2,766
	Total short-term investments	$	2,773	$	—	$	(7	)	$	2,766
	The components of the Company's marketable debt securities classified as available-for-sale were as follows for December 31, 2013 (in thousands):
	December 31, 2013	Amortized		Gross		Gross			Estimated
		Cost		Unrealized		Unrealized			Fair value
				Gains		Losses
	Cash	$	21,989	$	—	$	—		$	21,989
	Cash equivalents:
	Money market funds	6,306		—		—			6,306
	Total cash equivalents	6,306		—		—			6,306
	Total cash and cash equivalents	$	28,295	$	—	$	—		$	28,295
	Short-term investments:
	U.S. government and agency obligations	6,115		—		—			6,115
	Corporate notes and obligations	1,751		—		—			1,751
	Total short-term investments	$	7,866	$	—	$	—		$	7,866
Schedule of contractual maturities of available-for-sale debt securities	For investments in securities classified as available-for-sale, market value and the amortized cost of debt securities have been classified in accordance with the following maturity groupings based on the contractual maturities of those securities as of December 31, 2014 (in thousands):
	Contractual maturity	Amortized		Estimated
		Cost		Fair value
	Less than 1 year	$	1,956	$	1,954
	Between 1 and 2 years	817		812
	Total	$	2,773	$	2,766
	For investments in securities classified as available-for-sale, estimated fair value and the amortized cost of debt securities have been classified in accordance with the following maturity groupings based on the contractual maturities of those securities as of December 31, 2013 (in thousands):
	Contractual maturity	Amortized		Estimated
		Cost		Fair value
	Less than 1 year	$	5,066	$	5,066
	Between 1 and 2 years	2,800		2,800
	Total	$	7,866	$	7,866

Fair_Value_Measurements_Tables

Fair Value Measurements (Tables)	12 Months Ended
	Dec. 31, 2014
Fair Value Disclosures [Abstract]
Schedule of estimated fair value of financial assets	The Company measures financial assets at fair value on an ongoing basis. The estimated fair value of the Company's financial assets was determined using the following inputs at December 31, 2014 and 2013 (in thousands):
			Fair Value Measurements at Reporting Date Using
	December 31, 2014		Total		Quoted Prices in		Significant		Significant
					Active Markets for		Other Observable Inputs		Unobservable
					Identical Assets		(Level 2)		Inputs
					(Level 1)				(Level 3)
	Assets:
	Money market funds (1)		$	6,310	$	6,310	$	—	$	—
	Corporate notes and obligations (2)		2,766		—		2,766		—
	Total		$	9,076	$	6,310	$	2,766	$	—
	_______________________________________________________________________________
	-1	Included in cash and cash equivalents on the consolidated balance sheet.
	-2	Included in short-term investments on the consolidated balance sheet.
			Fair Value Measurements at Reporting Date Using
	December 31, 2013		Total		Quoted Prices in		Significant		Significant
					Active Markets for		Other Observable		Unobservable
					Identical Assets		Inputs		Inputs
					(Level 1)		(Level 2)		(Level 3)
	Assets:
	Money market funds(1)		$	6,306	$	6,306	$	—	$	—
	Corporate notes and obligations(2)		6,115		—		6,115		—
	U.S. government and agency obligations(2)		1,751		—		1,751		—
	Total		$	14,172	$	6,306	$	7,866	$	—
	_______________________________________________________________________________
	-1	Included in cash and cash equivalents on the consolidated balance sheet.
	-2	Included in short-term investments on the consolidated balance sheet.

Balance_Sheet_Components_Table

Balance Sheet Components (Tables)	12 Months Ended
	Dec. 31, 2014
Balance Sheet Components
Schedule of components of property and equipment	Property and equipment consisted of the following (in thousands):
		Estimated Useful Life		As of December 31,
				2014				2013
	Equipment	3 years		$	24,189			$	16,616
	Purchased software	5 years		6,784				6,648
	Furniture and fixtures	3 years		1,772				1,612
	Leasehold improvements	Lease term up to 5 years		1,947				1,872
	Construction in progress			3,724				72
	Property and equipment, gross			38,416				26,820
	Less: Accumulated depreciation			19,661				15,469
	Property and equipment, net			$	18,755			$	11,351
Schedule of components of prepaid and other current assets	Total prepaid and other current assets consisted of the following (in thousands):
		As of December 31,
		2014				2013
	Foreign withholding tax	$	177			$	403
	Convertible debt issuance costs, current portion	—				129
	Deferred commissions	4,215				3,381
	Prepaid expenses	5,856				1,945
	Other current assets	136				374
	Total prepaid and other current assets	$	10,384			$	6,232
Schedule of components of accrued payroll and related expenses	Accrued payroll and related expenses consisted of the following (in thousands):
		As of December 31,
		2014				2013
	Vacation accrual	$	2,793			$	2,139
	Commissions	2,387				2,177
	Bonus	1,628				1,262
	ESPP	966				686
	Severance liability	—				252
	Accrued payroll related expenses	1,277				861
	Total accrued payroll related expenses	$	9,051			$	7,377
Schedule of components of accrued expenses	Accrued expenses consisted of the following (in thousands):
		As of December 31,
		2014				2013
	Sales tax payable	$	733			$	1,099
	Income taxes payable	125				87
	Restructuring facility liability	148				98
	Versata settlement	1,963				—
	Holdback payable	1,922				—
	Customer payments	998				438
	Equipment financing arrangement	3,775				—
	Accrued expenses	7,204				3,673
	Total accrued expenses	$	16,868			$	5,395

Contractual_Obligations_Commit1

Contractual Obligations, Commitments and Contingencies (Tables)	12 Months Ended
	Dec. 31, 2014
Commitments and Contingencies Disclosure [Abstract]
Schedule of non-cancelable long-term operating and capital lease obligations and unconditional purchase commitments	For each of the next five years and beyond, the Company has the following contractual obligations, long-term operating and capital lease obligations and unconditional purchase commitments (in thousands):
		Settlement Payable (1)				Unconditional		Operating		Capital
						purchase		lease		lease
		Principal		Interest		commitments (2) (3) (4)		commitments (5)		obligations (6)
	Year Ending December 31:
	2015	$	1,963	$	37	$	9,271	$	694	$	1,011
	2016	1,900		100		223		2,323		—
	2017	466		34		—		2,266		—
	2018	—		—		—		2,185		—
	2019	—		—		—		2,024		—
	2020 and beyond	—		—		—		5,067		—
	Future minimum payments	$	4,329	$	171	$	9,494	$	14,559	1,011
	Less: amount representing interest									(10		)
	Present value of capital lease obligations									$	1,001

Net_Loss_Per_Share_Tables

Net Loss Per Share (Tables)	12 Months Ended
	Dec. 31, 2014
Earnings Per Share [Abstract]
Schedule of potential weighted average common shares excluded from computation of diluted net loss per share	Diluted net loss per share does not include the effect of the following potential weighted average common shares because to do so would be anti-dilutive for the periods presented (in thousands):
		Years Ended December 31,
		2014	2013	2012
	Restricted stock	2,379	1,918	3,543
	Stock options	1,630	2,490	3,299
	ESPP	39	42	67
	Convertible notes	829	7,129	7,680
	Total	4,877	11,579	14,589

StockBased_Compensation_Tables

Stock-Based Compensation (Tables)	12 Months Ended
	Dec. 31, 2014														Dec. 31, 2013
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Summary of stock-based compensation expenses	The table below sets forth a summary of stock-based compensation expense for the years ended December 31, 2014, 2013 and 2012 (in thousands).
		Years Ended December 31,
		2014				2013				2012
	Stock-based compensation:
	Stock Options	$	790			$	866			$	838
	Restricted Stock Units
	Performance-based Awards	2,370				1,097				444
	Service-based Awards	7,705				7,835				11,571
	ESPP	948				597				802
	Total stock-based compensation	$	11,813			$	10,395			$	13,655
Schedule of functional classification of stock-based compensation expense	The table below sets forth the functional classification of stock-based compensation expense for the years ended December 31, 2014, 2013 and 2012 (in thousands):
		Years Ended December 31,
		2014				2013				2012
	Stock-based compensation:
	Cost of recurring revenue	$	911			$	783			$	1,550
	Cost of services and other revenue	1,026				1,060				2,070
	Sales and marketing	3,518				2,420				3,778
	Research and development	2,012				1,797				1,782
	General and administrative	4,346				4,335				4,475
	Total stock-based compensation	$	11,813			$	10,395			$	13,655
Schedule of valuation assumptions for determining the fair value of stock options and employee stock purchase plans	The fair value of each stock option is estimated on the date of grant and the fair value of each ESPP share is estimated on the beginning date of the offering period using the Black-Scholes-Merton valuation model and the assumptions noted in the following table.
		Years Ended December 31,
		2014		2013		2012
	Stock Option Plans
	Expected life (in years)	—		5.0 to 6.1		5.0 to 6.0
	Risk-free interest rate	—		1.41% to 1.93%		0.72% to 1.33%
	Volatility	—		61% to 63%		60% to 65%
	Dividend Yield	—		—		—
	Employee Stock Purchase Plan
	Expected life (in years)	0.5 to 1.0		0.5 to 1.0		0.5 to 1.0
	Risk-free interest rate	0.05% to 0.12%		0.08% to 0.17%		0.13% to 0.20%
	Volatility	47% to 50%		41% to 62%		56% to 62%
	Dividend Yield	—		—		—
Summary of the Company's shares available for grant															A summary of the Company's shares available for grant and the status of options and awards are as follows:
																Years Ended December 31,
																2014		2013		2012
																(Number of Shares)
															Beginning Available	2,478,798		2,578,940		2,014,218
															Authorized	—		3,469,500		1,756,431
															Granted	(1,913,499	)	(2,024,798	)	(2,519,851	)
															Cancelled	383,549		1,335,591		1,328,142
															Expired	(178,337	)	(2,880,435	)	—
															Ending Available	770,511		2,478,798		2,578,940
Schedule of stock option activity
		Number of			Weighted				Weighted		Aggregate
		Shares			Average				Average		Intrinsic Value
					Exercise Price				Remaining		(in thousands)
									Contractual
									Term (Years)
	Outstanding as of December 31, 2011	4,403,003			$	4.71
	Granted	120,200			5.86
	Exercised	(714,820	)		5.16						$	1,358
	Forfeited	(134,346	)		3.52
	Expired	(638,555	)		7.64
	Outstanding as of December 31, 2012	3,035,482			4.09
	Granted	815,500			6.79
	Exercised	(1,427,456	)		3.54						6,151
	Forfeited	(108,306	)		5.1
	Expired	(367,006	)		5.3
	Outstanding as of December 31, 2013	1,948,214			5.34
	Granted	—			—
	Exercised	(701,220	)		4.09						5,940
	Forfeited	(44,407	)		7.4
	Expired	(26,626	)		10.17
	Outstanding as of December 31, 2014	1,175,961			$	5.89			5.99		$	12,278
	Vested and Expected to Vest as of December 31, 2014	1,100,528			$	5.82			5.83		$	11,566
	Exercisable as of December 31, 2014	730,899			$	5.33			4.6		$	8,039
Schedule of restricted stock unit activity
		Number of			Weighted		Aggregate
		Shares			Average		Intrinsic Value
					Remaining		(in thousands)
					Contractual
					Term (Years)
	Unreleased as of December 31, 2011	3,859,292
	Granted	2,399,651
	Released	(2,597,880	)
	Forfeited	(551,380	)
	Unreleased as of December 31, 2012	3,109,683
	Granted	1,209,298
	Released	(1,754,872	)
	Forfeited	(856,695	)
	Unreleased as of December 31, 2013	1,707,414
	Granted	1,913,499
	Released	(736,269	)
	Forfeited	(183,607	)
	Unreleased as of December 31, 2014	2,701,037			1.02		$	43,487
	Vested and Expected to Vest as of December 31, 2014	2,700,828			1.02		$	40,169
Schedule of range of exercise prices and weighted average remaining contractual life of outstanding options	As of December 31, 2014, the range of exercise prices and weighted average remaining contractual life of outstanding options are as follows:
					Options Outstanding						Options Exercisable
	Range of Exercise Prices	Number of			Weighted Average Remaining		Weighted Average				Number of		Weighted
		Shares			Contractual Life		Exercise Price				Shares		Average
					(Years)								Exercise Price
	$3.11 - $4.14	133,132			0.53		$	3.63			133,132		$	3.63
	$4.15 - $4.15	140,000			0.92		4.15				140,000		4.15
	$4.31 - $5.27	140,061			5.53		4.93				109,695		5.03
	$5.70 - $5.70	60,000			1.42		5.7				60,000		5.7
	$6.01 - $6.01	122,000			8.41		6.01				48,291		6.01
	$6.25 - $6.42	80,700			8.37		6.26				79,900		6.26
	$6.59 - $6.59	231,407			8.49		6.59				70,989		6.59
	$6.67 - $6.74	42,334			8.5		6.67				14,604		6.67
	$7.69 - $7.69	207,327			8.66		7.69				68,622		7.69
	$9.17 - $10.35	19,000			8.8		9.98				5,666		9.96
	$3.11 - $10.35	1,175,961			5.99		$	5.89			730,899		$	5.33

Income_Taxes_Tables

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Schedule of geographical breakdown of consolidated loss before income taxes by income tax jurisdiction	The following is a geographical breakdown of consolidated loss before income taxes by income tax jurisdiction (in thousands):
		2014			2013			2012
	United States	$	(11,557	)	$	(20,675	)	$	(27,796	)
	Foreign	1,008			1,319			486
	Total	$	(10,549	)	$	(19,356	)	$	(27,310	)
Schedule of provision (benefit) for income taxes	The provision for income taxes for 2014, 2013 and 2012 consists of the following (in thousands):
		2014			2013			2012
	Current:
	Federal	$	(25	)	$	—		$	4
	State	3			—			—
	Foreign	1,138			1,815			559
	Deferred:
	Federal	78			159			(185		)
	State	(89		)	—			(22		)
	Foreign	(93		)	81			32
	Total provision for income taxes	$	1,012		$	2,055		$	388
Schedule of provision (benefit) for income taxes that differs from the expected tax benefit computed by applying the statutory federal income tax rates to consolidated loss before income taxes	The provision for income taxes differs from the expected tax benefit computed by applying the statutory federal income tax rates to consolidated loss before income taxes as follows (in thousands):
		Year Ended December 31,
		2014			2013			2012
	Federal tax at statutory rate	$	(3,587	)	$	(6,581	)	$	(9,286	)
	State taxes, net of benefit	3			—			—
	Non-deductible expenses	453			1,248			2,416
	Foreign taxes	703			1,447			427
	Current year net operating losses and other deferred tax assets for which no benefit has been recognized	4,828			7,320			7,181
	Research and experimentation credit	(1,239		)	(1,379		)	—
	Tax benefit due to the recognition of acquired deferred tax liabilities	(149		)	—			(350		)
	Total provision for income taxes	$	1,012		$	2,055		$	388
Schedule of components of net deferred tax assets	Net deferred tax assets consist of the following (in thousands):
		As of December 31,
		2014			2013
	Deferred tax assets
	Net operating loss carryforwards	$	54,712		$	53,902
	Accrued expenses	5,420			2,161
	Unrealized gain/loss on investments	916			915
	Research and experimentation credit carryforwards	12,609			10,884
	Capitalized research and experimentation costs	14,072			18,100
	Deferred stock compensation	3,956			2,223
	Gross deferred tax assets	91,685			88,185
	Less valuation allowance	(90,598		)	(86,604		)
	Total deferred tax assets, net of valuation allowance	1,087			1,581
	Deferred tax liabilities
	Property and equipment and intangibles	(1,699		)	(1,602		)
	Goodwill	(1,024		)	(887		)
	Net deferred tax liabilities	$	(1,636	)	$	(908	)
Schedule of activity related to the Company's unrecognized tax benefits	The activity related to the Company's unrecognized tax benefits is set forth below (in thousands):
		Amount
	Balance at January 1, 2013	$	2,478
	Increases related to prior year tax positions	175
	Increases related to current year tax positions	222
	Reductions to unrecognized tax benefits as a result of a lapse of applicable statute of limitations	(32		)
	Balance at December 31, 2013 (1)	2,843
	Increases related to prior year tax positions	(44		)
	Increases related to current year tax positions	270
	Reductions to unrecognized tax benefits as a result of a lapse of applicable statute of limitations	(32		)
	Balance at December 31, 2014 (2)	$	3,037
	(1) $2.6 million million of the unrecognized tax benefits reduced deferred tax assets and $0.3 million was included in accrued expenses on the consolidated balance sheet.
	(2) $2.7 million of the unrecognized tax benefits reduced deferred tax assets and $0.3 million was included in accrued expenses on the consolidated balance sheet.

Segment_Geographic_and_Custome1

Segment, Geographic and Customer Information (Tables)	12 Months Ended
	Dec. 31, 2014
Segment Reporting [Abstract]
Summary of revenues by geographic areas	The following table summarizes revenue for the years ended December 31, 2014, 2013 and 2012 by geographic areas (in thousands):
		2014		2013		2012
	United States	$	106,194	$	88,684	$	74,477
	EMEA	15,162		12,241		11,578
	Asia Pacific	8,400		5,379		4,943
	Other	6,862		6,033		3,954
		$	136,618	$	112,337	$	94,952

The_Company_and_Significant_Ac3

The Company and Significant Accounting Policies (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Sep. 30, 2014	Jun. 30, 2014
Allowance for doubtful accounts and service remediation reserve
Deferred costs	$5,600,000	$4,800,000
Advertising expense	1,200,000	227,000	146,000
Line of Credit Facility, Maximum Borrowing Capacity				15,000,000	10,000,000
Changes in reserve accounts
Long-term Line of Credit, Noncurrent	10,481,000	0
Deferred costs included in prepaid and other current assets	4,200,000	3,400,000
Allowance for doubtful accounts
Changes in reserve accounts
Balance at Beginning of Period	650,000	481,000	225,000
(Benefit) Provision Net of Recoveries	996,000	830,000	434,000
Write-offs	-583,000	-661,000	-178,000
Balance at End of Period	1,063,000	650,000	481,000
Minimum
Allowance for doubtful accounts and service remediation reserve
Line of Credit Facility, Maximum Borrowing Capacity	5,000,000
Maximum
Allowance for doubtful accounts and service remediation reserve
Line of Credit Facility, Maximum Borrowing Capacity	$10,000,000

The_Company_and_Significant_Ac4

The Company and Significant Accounting Policies (Details 1) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Prepaid and other current assets and deposits and other assets
Restricted cash included in deposits and other assets	0.2	$0.50
Deferred costs included in prepaid and other current assets	4.2	$3.40
Minimum
Property and Equipment, net
Property, Plant and Equipment, Useful Life	3 years
Maximum
Property and Equipment, net
Property, Plant and Equipment, Useful Life	5 years

The_Company_and_Significant_Ac5

The Company and Significant Accounting Policies (Details 2)	12 Months Ended
	Dec. 31, 2014
	segment
Goodwill
Number of reporting units	1
Minimum
Intangible assets with finite lives
Amortization period	1 year
Maximum
Intangible assets with finite lives
Amortization period	12 years

The_Company_and_Significant_Ac6

The Company and Significant Accounting Policies (Details 3) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Business Combinations
Measurement period of business combinations	1 year
Cost of Revenues
Deferred costs	$5,600,000	$4,800,000
Deferred costs included in prepaid and other current assets	4,200,000	3,400,000
Advertising Costs
Advertising expense	$1,200,000	$227,000	$146,000

Restructuring_Details

Restructuring (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Restructuring and Related Activities [Abstract]
Restructuring expenses	$1,025,000	$1,699,000	$1,115,000
Restructuring
Other Noncash Income (Expense)	800,000
Changes in restructuring reserve
Balance at the beginning of the period	194,000	375,000	878,000
Cash Payments		-232,000	-1,706,000
Additions		20,000	-7,000
Adjustments		433,000	2,202,000
Balance at the end of the period		194,000	375,000
Severance and termination-related costs
Changes in restructuring reserve
Balance at the beginning of the period		141,000	589,000
Cash Payments		-70,000	-1,706,000
Additions		0	-7,000
Adjustments		211,000	2,147,000
Balance at the end of the period		0	141,000
Facilities related costs
Changes in restructuring reserve
Balance at the beginning of the period		234,000	289,000
Cash Payments		-162,000	0
Additions		20,000	0
Adjustments		222,000	55,000
Balance at the end of the period		$194,000	$234,000

Acquisition_Details

Acquisition (Details) (USD $)	0 Months Ended		12 Months Ended
	Sep. 16, 2014	Feb. 04, 2014	Dec. 31, 2014	Dec. 31, 2013
Acquisitions
Goodwill			46,970,000	$31,207,000
Business Acquisition, Indemnity Holdback Accrued			1,922,000	0
Clicktools [Member]
Acquisitions
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	3,000,000
Cash paid for the acquisition	14,800,000
Indemnity holdback	1,600,000
Total purchase consideration	16,405,000
Net Tangible Assets Acquired/(Liabilities Assumed)	-1,270,000
Identifiable intangible assets	3,000,000
Goodwill	14,675,000
LeadRocket, Inc. [Member]
Acquisitions
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles		2,640,000
Cash paid for the acquisition		2,500,000
Indemnity holdback		500,000
Total purchase consideration		3,000,000
Net Tangible Assets Acquired/(Liabilities Assumed)		-1,224,000
Identifiable intangible assets		2,640,000
Goodwill		1,584,000
Business Acquisition, Indemnity Holdback Accrued			300,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities Noncurrent		3,000,000
United Kingdom, Pounds | Clicktools [Member]
Acquisitions
Indemnity holdback	1,000,000
Developed technology | Clicktools [Member]
Acquisitions
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	1,300,000
Amortization period	3 years
Developed technology | LeadRocket, Inc. [Member]
Acquisitions
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles		570,000
Tradename | Clicktools [Member]
Acquisitions
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	600,000
Amortization period	3 years
Tradename | LeadRocket, Inc. [Member]
Acquisitions
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles		850,000
Amortization period	5 years
Customer relationships | Clicktools [Member]
Acquisitions
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	1,100,000
Amortization period	3 years
Customer relationships | LeadRocket, Inc. [Member]
Acquisitions
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles		160,000
Amortization period	3 years
Patents [Member] | LeadRocket, Inc. [Member]
Acquisitions
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles		$1,060,000
Amortization period	10 years
Minimum
Acquisitions
Amortization period			1 year
Minimum | Developed technology | LeadRocket, Inc. [Member]
Acquisitions
Amortization period	2 years
Maximum
Acquisitions
Amortization period			12 years
Maximum | Developed technology | LeadRocket, Inc. [Member]
Acquisitions
Amortization period	4 years

Goodwill_and_Intangible_Assets2

Goodwill and Intangible Assets (Details) (USD $)	12 Months Ended	1 Months Ended	0 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Feb. 28, 2014	Sep. 16, 2014
Additional disclosure
Balance at the beginning of the period	$31,207
Acquisitions	16,259
Goodwill, Translation Adjustments	-496
Balance at the end of the period	46,970
LeadRocket [Member]
Additional disclosure
Acquisitions		1,584
Clicktools [Member]
Additional disclosure
Balance at the beginning of the period			14,675
Acquisitions			$14,675

Goodwill_and_Intangible_Assets3

Goodwill and Intangible Assets (Details 2) (USD $)	12 Months Ended			0 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Sep. 16, 2014	Feb. 04, 2014
Changes in intangible assets during the year
Cost		$34,117	$33,493
Balance at the beginning of the period, net	16,995	21,196
Additions	5,852	624
Finite-Lived Intangible Assets, Translation Adjustments	-119	0
Amortization Expense	-4,971	-4,825	-5,094
Balance at the end of the period, net	17,757	16,995	21,196
Developed technology
Changes in intangible assets during the year
Cost		21,187	20,576
Balance at the beginning of the period, net	9,669	12,384
Additions	3,906	611
Finite-Lived Intangible Assets, Translation Adjustments	-53	0
Amortization Expense	-3,271	-3,326
Balance at the end of the period, net	10,251	9,669
Developed technology | Weighted average
Changes in intangible assets during the year
Amortization period	4 years 1 month 6 days	4 years 3 months 18 days
Customer relationships
Changes in intangible assets during the year
Cost		8,154	8,154
Balance at the beginning of the period, net	4,076	4,952
Additions	1,260	0
Finite-Lived Intangible Assets, Translation Adjustments	-41	0
Amortization Expense	-1,025	-876
Balance at the end of the period, net	4,270	4,076
Customer relationships | Weighted average
Changes in intangible assets during the year
Amortization period	3 years 7 months 6 days	4 years 10 months 24 days
Tradenames
Changes in intangible assets during the year
Cost		1,522	1,522
Balance at the beginning of the period, net	828	1,040
Additions	686	0
Finite-Lived Intangible Assets, Translation Adjustments	-25	0
Amortization Expense	-298	-212
Balance at the end of the period, net	1,191	828
Tradenames | Weighted average
Changes in intangible assets during the year
Amortization period	3 years 7 months 6 days	5 years 2 months 12 days
Favorable lease
Changes in intangible assets during the year
Cost		53	40
Balance at the beginning of the period, net	0	1
Additions	0	13
Finite-Lived Intangible Assets, Translation Adjustments	0	0
Amortization Expense	0	-14
Balance at the end of the period, net	0	0
Patents and licenses
Changes in intangible assets during the year
Cost		3,059	3,059
Balance at the beginning of the period, net	2,393	2,744
Additions	0	0
Finite-Lived Intangible Assets, Translation Adjustments	0	0
Amortization Expense	-348	-351
Balance at the end of the period, net	2,045	2,393
Patents and licenses | Weighted average
Changes in intangible assets during the year
Amortization period	6 years 8 months 12 days	7 years 7 months 6 days
Other
Changes in intangible assets during the year
Cost		142	142
Balance at the beginning of the period, net	29	75
Additions	0	0
Finite-Lived Intangible Assets, Translation Adjustments	0	0
Amortization Expense	-29	-46
Balance at the end of the period, net	0	29
Other | Weighted average
Changes in intangible assets during the year
Amortization period		6 months
LeadRocket, Inc. [Member]
Intangible assets
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles					2,640
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities Noncurrent					3,000
LeadRocket, Inc. [Member] | Developed technology
Intangible assets
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles					570
LeadRocket, Inc. [Member] | Customer relationships
Intangible assets
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles					160
Changes in intangible assets during the year
Amortization period				3 years
LeadRocket, Inc. [Member] | Tradenames
Intangible assets
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles					850
Changes in intangible assets during the year
Amortization period				5 years
Clicktools [Member]
Intangible assets
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles				3,000
Clicktools [Member] | Developed technology
Intangible assets
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles				1,300
Changes in intangible assets during the year
Amortization period				3 years
Clicktools [Member] | Customer relationships
Intangible assets
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles				1,100
Changes in intangible assets during the year
Amortization period				3 years
Clicktools [Member] | Tradenames
Intangible assets
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles				600
Changes in intangible assets during the year
Amortization period				3 years

Goodwill_and_Intangible_Assets4

Goodwill and Intangible Assets (Details 3) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Intangible assets
Intangible assets, net	17,757	$16,995	$21,196
Minimum
Intangible assets
Amortization period	1 year
Maximum
Intangible assets
Amortization period	12 years
Developed technology
Intangible assets
Intangible assets, net	10,251	9,669	12,384
Future expected amortization expense
2014	2,828
2015	2,741
2016	2,417
2017	1,519
2018	311
2019 and beyond	435
Total expected amortization expense	10,251
Customer relationships
Intangible assets
Intangible assets, net	4,270	4,076	4,952
Future expected amortization expense
2014	1,290
2015	1,290
2016	1,019
2017	491
2018	74
2019 and beyond	106
Total expected amortization expense	4,270
Tradenames
Intangible assets
Intangible assets, net	1,191	828	1,040
Future expected amortization expense
2014	382
2015	353
2016	285
2017	96
2018	32
2019 and beyond	43
Total expected amortization expense	1,191
Patents and licenses
Intangible assets
Intangible assets, net	2,045	2,393	2,744
Future expected amortization expense
2014	346
2015	346
2016	346
2017	313
2018	180
2019 and beyond	514
Total expected amortization expense	2,045
Other
Intangible assets
Intangible assets, net	0	$29	$75

Financial_Instruments_Details

Financial Instruments (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
In Thousands, unless otherwise specified
Financial instruments
Cash and cash equivalents	$34,200	$28,295	$16,400	$17,383
Total		7,866
Cash
Financial instruments
Cash and cash equivalents	27,890	21,989
Estimated Fair Value	27,890	21,989
Cash equivalents
Financial instruments
Cash and cash equivalents	6,310	6,306
Estimated Fair Value	6,310	6,306
Money market funds
Financial instruments
Cash and cash equivalents	6,310	6,306
Estimated Fair Value	6,310	6,306
Cash and cash equivalents
Financial instruments
Cash and cash equivalents	34,200	28,295
Estimated Fair Value	34,200	28,295
Short-term investments
Financial instruments
Total	2,773	7,866
Gross Unrealized Gains	0	0
Gross Unrealized Losses	-7	0
Total	2,766	7,866
U.S. government and agency obligations
Financial instruments
Total	2,773	6,115
Gross Unrealized Gains	0	0
Gross Unrealized Losses	-7	0
Total	2,766	6,115
Corporate notes and obligations
Financial instruments
Total		1,751
Gross Unrealized Gains		0
Gross Unrealized Losses		0
Total		$1,751

Financial_Instruments_Details_

Financial Instruments (Details 2) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
	investment	investment
Contractual maturity, Amortized Cost
Less than 1 year	$1,956,000	$5,066,000
Between 1 and 2 years	817,000	2,800,000
Total	2,773,000
Total		7,866,000
Contractual maturity, Estimated Fair value
Less than 1 year	1,954,000	5,066,000
Between 1 and 2 years	812,000	2,800,000
Total	2,766,000	7,866,000
Other disclosures pertaining to available-for-sale securities
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Less than One Year	0	0
Realized losses on sale of investments	0	0	0
Proceeds from maturities and sales of investments, net of purchases	$5,100,000	$4,800,000

Fair_Value_Measurements_Detail

Fair Value Measurements (Details) (Ongoing basis, USD $)	Dec. 31, 2014		Dec. 31, 2013
In Thousands, unless otherwise specified
Assets:
Fair value of assets	$9,076		$14,172
Money market funds
Assets:
Fair value of assets	6,310		6,306
Corporate Debt Securities [Member]
Assets:
Fair value of assets	2,766	[1]	6,115
US Treasury and Government [Member]
Assets:
Fair value of assets			1,751
Quoted Prices in Active Markets for Identical Assets (Level 1)
Assets:
Fair value of assets	6,310		6,306
Quoted Prices in Active Markets for Identical Assets (Level 1) | Money market funds
Assets:
Fair value of assets	6,310		6,306
Quoted Prices in Active Markets for Identical Assets (Level 1) | Corporate Debt Securities [Member]
Assets:
Fair value of assets	0		0
Quoted Prices in Active Markets for Identical Assets (Level 1) | US Treasury and Government [Member]
Assets:
Fair value of assets			0
Significant Other Observable Inputs (Level 2)
Assets:
Fair value of assets	2,766		7,866
Significant Other Observable Inputs (Level 2) | Money market funds
Assets:
Fair value of assets	0		0
Significant Other Observable Inputs (Level 2) | Corporate Debt Securities [Member]
Assets:
Fair value of assets	2,766		6,115
Significant Other Observable Inputs (Level 2) | US Treasury and Government [Member]
Assets:
Fair value of assets			1,751
Significant Unobservable Inputs (Level 3)
Assets:
Fair value of assets	0		0
Significant Unobservable Inputs (Level 3) | Money market funds
Assets:
Fair value of assets	0		0
Significant Unobservable Inputs (Level 3) | Corporate Debt Securities [Member]
Assets:
Fair value of assets	0		0
Significant Unobservable Inputs (Level 3) | US Treasury and Government [Member]
Assets:
Fair value of assets			$0
[1]	Included in short-term investments on the consolidated balance sheet.

Balance_Sheet_Components_Detai

Balance Sheet Components (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Property and equipment
Foreign withholding tax	$177,000	$403,000
Deferred Foreign Income Tax Expense (Benefit)	-93,000	81,000	32,000
Property and equipment, gross	38,416,000	26,820,000
Less: Accumulated depreciation	19,661,000	15,469,000
Property and equipment, net	18,755,000	11,351,000
Depreciation and amortization expense	4,800,000	4,500,000	3,100,000
Amortization of intangible assets	4,971,000	4,825,000	5,094,000
Prepaids and other current assets
Convertible debt issuance costs, current portion	0	129,000
Deferred costs	4,215,000	3,381,000
Prepaid expenses	5,856,000	1,945,000
Other current assets	136,000	374,000
Total prepaid and other current assets	10,384,000	6,232,000
Accrued payroll and related expenses
Vacation accrual	2,793,000	2,139,000
Commissions	2,387,000	2,177,000
Accrued Bonuses, Current	1,628,000	1,262,000
ESPP	966,000	686,000
Restructuring severance liability	0	252,000
Accrued payroll related expenses	1,277,000	861,000
Total accrued payroll related expenses	9,051,000	7,377,000
Accrued expenses
Sales tax payable	733,000	1,099,000
Income taxes payable	125,000	87,000
Restructuring facility liability	148,000	98,000
Estimated Litigation Liability, Current	1,963,000	0
Business Acquisition, Indemnity Holdback Accrued	1,922,000	0
Customer Deposits, Current	998,000	438,000
Loans Payable, Current	3,775,000	0
Other Accrued Liabilities, Current	7,204,000	3,673,000
Total accrued expenses	16,868,000	5,395,000
Equipment
Property and equipment
Property and equipment, gross	24,189,000	16,616,000
Property, Plant and Equipment, Useful Life	3 years
Purchased software
Property and equipment
Property and equipment, gross	6,784,000	6,648,000
Property, Plant and Equipment, Useful Life	5 years
Furniture and fixtures
Property and equipment
Property and equipment, gross	1,772,000	1,612,000
Property, Plant and Equipment, Useful Life	3 years
Leasehold improvements
Property and equipment
Property and equipment, gross	1,947,000	1,872,000
Property, Plant and Equipment, Useful Life	5 years
Construction in progress
Property and equipment
Property and equipment, gross	3,724,000	72,000
Assets acquired under capital leases
Property and equipment
Property and equipment, gross	6,900,000	7,300,000
Less: Accumulated depreciation	$4,300,000	$3,500,000

Convertible_Notes_Details

Convertible Notes (Details) (USD $)	12 Months Ended			3 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013
Convertible Notes
Aggregate principal amount of debt outstanding	$0	$14,197,000		$14,197,000
Debt Conversion, Converted Instrument, Amount	14,197,000	45,018,000	0
Reclassification of deferred debt issuance cost to additional paid-in capital	253,000	1,037,000	0
Convertible debt issuance costs, current portion	0	129,000		129,000
4.75 % Convertible Senior Notes due in 2016
Convertible Notes
Interest rate, stated percentage	4.75%
Debt Conversion, Converted Instrument, Amount	14,200,000			45,000,000
Debt Conversion, Converted Instrument, Shares Issued	1,840,770
Accrued interest paid upon debt conversion	300,000
Cash and stock premium paid upon debt conversion				4,800,000
Reclassification of deferred debt issuance cost to additional paid-in capital	300,000			1,000,000
Percentage of the conversion price that the closing price of the entity's common stock must exceed in order for the notes to be convertible		130.00%		130.00%
Number of days within 30 consecutive trading days in which the closing price of the entity's common stock must exceed the conversion price for the notes to be redeemable		20 days
Number of consecutive trading days during which the closing price of the entity's common stock must exceed the conversion price for at least 20 days in order for the notes to be redeemable		30 days
Number of trading days prior to the date on which the entity provides notice of redemption		5 days
Redemption price as percentage of principal amount of notes, plus accrued and unpaid interest		100.00%
Convertible debt issuance costs, current portion		100,000		100,000
Debt issuance costs, recorded in deposits and other assets		$200,000		$200,000

Contractual_Obligations_Commit2

Contractual Obligations, Commitments and Contingencies (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Contractual cash obligations
Quarterly installment of legal settlement	$500,000
Operating lease rent expense	2,100,000	1,900,000	1,500,000
Restricted cash	200,000	500,000
Unconditional purchase commitments
Contractual cash obligations
2014	9,271,000
2015	223,000
2016	0
2017	0
Future minimum payments	9,494,000
Operating lease commitments
Contractual cash obligations
2014	694,000
2015	2,323,000
2016	2,266,000
2017	2,185,000
2018	2,024,000
2019 and beyond	5,067,000
Future minimum payments	14,559,000
Principal of settlement payable [Member]
Contractual cash obligations
2014	1,963,000
2015	1,900,000
2016	466,000
2017	0
2018	0
2019 and beyond	0
Future minimum payments	4,329,000
Interest on settlement payable [Member]
Contractual cash obligations
2014	37,000
2015	100,000
2016	34,000
2017	0
2018	0
Future minimum payments	171,000
Capital lease obligations
Contractual cash obligations
2014	1,011,000
2015	0
2016	0
Future minimum payments	1,011,000
Less: amount representing interest	-10,000
Present value of capital lease obligations	1,001,000
EMC Storage Equipment [Member]
Contractual cash obligations
Principal Amount Outstanding on Loans Managed and Securitized or Asset-backed Financing Arrangement	3,800,000
EMC Storage Equipment [Member] | Due in Three Months [Member]
Contractual cash obligations
Principal Amount Outstanding on Loans Managed and Securitized or Asset-backed Financing Arrangement	$2,600,000

Contractual_Obligations_Commit3

Contractual Obligations, Commitments and Contingencies (Details 2) (USD $)	12 Months Ended		1 Months Ended	12 Months Ended	77 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Jan. 31, 2022	Dec. 31, 2015	15-May-22
Commitments and Contingencies
Liability for Uncertain Tax Positions, Current	$3,000,000
Long-term commitment
Quarterly installment of legal settlement	500,000
Estimated Litigation Liability	4,500,000
Prepaid Royalties	1,400,000
EMC Storage Equipment [Member]
Long-term commitment
Principal Amount Outstanding on Loans Managed and Securitized or Asset-backed Financing Arrangement	3,800,000
Versata [Member]
Long-term commitment
Patent settlement	2,900,000
Amortization period	9 years 6 months
Xactly Corporation [Member]
Long-term commitment
Litigation Settlement, Gross	2,000,000
Quarterly installment of legal settlement		500,000
Due in Three Months [Member] | EMC Storage Equipment [Member]
Long-term commitment
Principal Amount Outstanding on Loans Managed and Securitized or Asset-backed Financing Arrangement	2,600,000
Due in One Year [Member] | EMC Storage Equipment [Member]
Long-term commitment
Principal Amount Outstanding on Loans Managed and Securitized or Asset-backed Financing Arrangement	1,200,000
Dublin (CA) Headquarter [Member]
Long-term commitment
Deposits	1,100,000
Pleasanton Headquarters [Member]
Long-term commitment
Letters of Credit Outstanding, Amount	200,000
Principal of settlement payable [Member]
Long-term commitment
Amount of commitment with a vendor	1,963,000
Contractual Obligation	4,329,000
Scenario, Forecast [Member] | Dublin (CA) Headquarter [Member]
Long-term commitment
Payments for Rent			$184,411	$149,928	$0

Revolving_Line_of_Credit_Detai

Revolving Line of Credit (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Sep. 30, 2014	Jun. 30, 2014
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity				$15,000,000	$10,000,000
Line of Credit Facility, Priority	7500
Proceeds from Lines of Credit	10,481,000	0	0
Line of Credit Facility, Interest Rate During Period	2.00%
Maximum
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	10,000,000
Minimum
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	$5,000,000

Net_Loss_Per_Share_Details

Net Loss 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
Net Loss Per Share
Anti-dilutive securities excluded from computation of diluted net loss per share (in shares)	4,877	11,579	14,589
Restricted stock
Net Loss Per Share
Anti-dilutive securities excluded from computation of diluted net loss per share (in shares)	2,379	1,918	3,543
Stock options
Net Loss Per Share
Anti-dilutive securities excluded from computation of diluted net loss per share (in shares)	1,630	2,490	3,299
Weighted average exercise price (in dollars per share)	4.09	4.42	4.74
ESPP
Net Loss Per Share
Anti-dilutive securities excluded from computation of diluted net loss per share (in shares)	39	42	67
Convertible notes
Net Loss Per Share
Anti-dilutive securities excluded from computation of diluted net loss per share (in shares)	829	7,129	7,680

StockBased_Compensation_Detail

Stock-Based Compensation (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Stock-based compensation
Stock-based compensation expense	$11,813,000	$10,395,000	$13,655,000
Options
Stock-based compensation
Stock-based compensation expense	790,000	866,000	838,000
Unrecognized compensation expense, stock options	1,800,000
Weighted average recognition period	2 years 5 months 19 days
Restricted Stock Units
Stock-based compensation
Unrecognized compensation expense, share-based awards other than options	16,100,000
Weighted average recognition period	1 year 8 months 23 days
Performance Awards
Stock-based compensation
Stock-based compensation expense	2,370,000	1,097,000	444,000
Non-performance Awards
Stock-based compensation
Stock-based compensation expense	7,705,000	7,835,000	11,571,000
ESPP
Stock-based compensation
Stock-based compensation expense	948,000	597,000	802,000
Unrecognized compensation expense, share-based awards other than options	$500,000
Weighted average recognition period	0 years 7 months 6 days

StockBased_Compensation_Detail1

Stock-Based Compensation (Details 2) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Classification of stock-based compensation expense
Stock-based compensation expense	$11,813	$10,395	$13,655
Cost of recurring revenues
Classification of stock-based compensation expense
Stock-based compensation expense	911	783	1,550
Cost of services and other revenues
Classification of stock-based compensation expense
Stock-based compensation expense	1,026	1,060	2,070
Sales and marketing
Classification of stock-based compensation expense
Stock-based compensation expense	3,518	2,420	3,778
Research and development
Classification of stock-based compensation expense
Stock-based compensation expense	2,012	1,797	1,782
General and administrative
Classification of stock-based compensation expense
Stock-based compensation expense	$4,346	$4,335	$4,475

StockBased_Compensation_Detail2

Stock-Based Compensation (Details 3) (USD $)	12 Months Ended
In Thousands, except Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Shares Available for Grant
Beginning Available (in shares)	2,478,798	2,578,940	2,014,218
Authorized (in shares)	0	3,469,500	1,756,431
Granted (in shares)	1,913,499	2,024,798	2,519,851
Forfeited (in shares)	383,549	1,335,591	1,328,142
Expired (in shares)	178,337	2,880,435	0
Ending Available (in shares)	770,511	2,478,798	2,578,940
Stock options
Fair value assumptions using the Black-Scholes-Merton valuation model
Risk-free interest rate, minimum (as a percent)	0.00%	1.41%	0.72%
Risk-free interest rate, maximum (as a percent)	0.00%	1.93%	1.33%
Volatility, minimum (as a percent)	0.00%	61.00%	60.00%
Volatility, maximum (as a percent)	0.00%	63.00%	65.00%
Dividend Yield (as a percent)	0.00%	0.00%	0.00%
Additional disclosures
Vesting period		4 years
Number of Shares
Outstanding at the beginning of the period (in shares)	1,948,214	3,035,482	4,403,003
Granted (in shares)	0	815,500	120,200
Exercised (in shares)	-701,220	-1,427,456	-714,820
Forfeited (in shares)	-44,407	-108,306	-134,346
Expired (in shares)	-26,626	-367,006	-638,555
Outstanding at the end of the period (in shares)	1,175,961	1,948,214	3,035,482
Vested and Expected to Vest at the end of the period (in shares)	1,100,528
Exercisable at the end of the period (in shares)	730,899
Weighted Average Exercise Price
Outstanding at the beginning of the period (in dollars per share)	5.34	4.09	4.71
Granted (in dollars per share)	0	6.79	5.86
Exercised (in dollars per share)	4.09	3.54	5.16
Forfeited (in dollars per share)	7.4	5.1	3.52
Expired (in dollars per share)	10.17	5.3	7.64
Outstanding at the end of the period (in dollars per share)	5.89	5.34	4.09
Vested and Expected to Vest at the end of the period (in dollars per share)	5.82
Exercisable at the end of the period (in dollars per share)	5.33
Weighted Average Remaining Contractual Term
Outstanding at the end of the period	5 years 11 months 27 days
Vested and Expected to Vest at the end of the period	5 years 9 months 29 days
Exercisable at the end of the period	4 years 7 months 6 days
Aggregate Intrinsic Value
Exercised (in dollars)	5,940	6,151	1,358
Outstanding at the end of the period (in dollars)	12,278
Vested and Expected to Vest at the end of the period (in dollars)	11,566
Exercisable at the end of the period (in dollars)	8,039
Stock options | Minimum
Fair value assumptions using the Black-Scholes-Merton valuation model
Expected life (in years)	0 years	5 years	5 years
Stock options | Maximum
Fair value assumptions using the Black-Scholes-Merton valuation model
Expected life (in years)	0 years	6 years 1 month 6 days	6 years
Employee Stock Purchase Plan
Fair value assumptions using the Black-Scholes-Merton valuation model
Risk-free interest rate, minimum (as a percent)	0.05%	0.08%	0.13%
Risk-free interest rate, maximum (as a percent)	0.12%	0.17%	0.20%
Volatility, minimum (as a percent)	47.00%	41.00%	56.00%
Volatility, maximum (as a percent)	50.00%	62.00%	62.00%
Dividend Yield (as a percent)	0.00%	0.00%	0.00%
Employee Stock Purchase Plan | Minimum
Fair value assumptions using the Black-Scholes-Merton valuation model
Expected life (in years)	0 years 6 months	6 months	6 months
Employee Stock Purchase Plan | Maximum
Fair value assumptions using the Black-Scholes-Merton valuation model
Expected life (in years)	1 year	1 year	1 year
Restricted stock units
Additional disclosures
Vesting period		3 years
Stock Option Plan 1997 and Stock Incentive Plan 2003 [Member] | Restricted stock units
Number of Shares
Outstanding at the beginning of the period (in shares)	1,707,414	3,109,683	3,859,292
Granted (in shares)	1,913,499	1,209,298	2,399,651
Released (in shares)	-736,269	-1,754,872	-2,597,880
Forfeited (in shares)	-183,607	-856,695	-551,380
Outstanding at the end of the period (in shares)	2,701,037	1,707,414	3,109,683
Vested or Expected to Vest at the end of the period (in shares)	2,700,828
Weighted Average Remaining Contractual Term
Outstanding at the end of the period	1 year 7 days
Vested and Expected to Vest at the end of the period	1 year 7 days
Aggregate Intrinsic Value
Outstanding at the end of the period (in dollars)	43,487
Vested or Expected to Vest at the end of the period (in dollars)	40,169
2013 Stock Incentive Plan [Member]
Shares Available for Grant
Authorized (in shares)		3,469,500

StockBased_Compensation_Detail3

Stock-Based Compensation (Details 4) (Stock options, USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
$3.11 - $4.14
Stock-Based Compensation
Range of exercise prices - lower limit (in dollars per share)		$3.11
Range of exercise prices - upper limit (in dollars per share)		$4.14
Options Outstanding, Number of Shares	133,132
Options Outstanding, Weighted Average Remaining Contractual Life	6 months 11 days
Options Outstanding, Weighted Average Exercise Price (in dollars per share)	$3.63
Options Exercisable, Number of Shares	133,132
Options Exercisable, Weighted Average Exercise Price (in dollars per share)	$3.63
$4.15 - $4.15
Stock-Based Compensation
Range of exercise prices - lower limit (in dollars per share)		$4.15
Range of exercise prices - upper limit (in dollars per share)		$4.15
Options Outstanding, Number of Shares	140,000
Options Outstanding, Weighted Average Remaining Contractual Life	11 months 1 day
Options Outstanding, Weighted Average Exercise Price (in dollars per share)	$4.15
Options Exercisable, Number of Shares	140,000
Options Exercisable, Weighted Average Exercise Price (in dollars per share)	$4.15
$4.31 - $5.27
Stock-Based Compensation
Range of exercise prices - lower limit (in dollars per share)		$4.31
Range of exercise prices - upper limit (in dollars per share)		$5.27
Options Outstanding, Number of Shares	140,061
Options Outstanding, Weighted Average Remaining Contractual Life	5 years 6 months 11 days
Options Outstanding, Weighted Average Exercise Price (in dollars per share)	$4.93
Options Exercisable, Number of Shares	109,695
Options Exercisable, Weighted Average Exercise Price (in dollars per share)	$5.03
$5.70 - $5.70
Stock-Based Compensation
Range of exercise prices - lower limit (in dollars per share)		$5.70
Range of exercise prices - upper limit (in dollars per share)		$5.70
Options Outstanding, Number of Shares	60,000
Options Outstanding, Weighted Average Remaining Contractual Life	1 year 5 months 1 day
Options Outstanding, Weighted Average Exercise Price (in dollars per share)	$5.70
Options Exercisable, Number of Shares	60,000
Options Exercisable, Weighted Average Exercise Price (in dollars per share)	$5.70
$6.01 - $6.01
Stock-Based Compensation
Range of exercise prices - lower limit (in dollars per share)		$6.01
Range of exercise prices - upper limit (in dollars per share)		$6.01
Options Outstanding, Number of Shares	122,000
Options Outstanding, Weighted Average Remaining Contractual Life	8 years 4 months 28 days
Options Outstanding, Weighted Average Exercise Price (in dollars per share)	$6.01
Options Exercisable, Number of Shares	48,291
Options Exercisable, Weighted Average Exercise Price (in dollars per share)	$6.01
$6.25 - $6.42
Stock-Based Compensation
Range of exercise prices - lower limit (in dollars per share)		$6.25
Range of exercise prices - upper limit (in dollars per share)		$6.42
Options Outstanding, Number of Shares	80,700
Options Outstanding, Weighted Average Remaining Contractual Life	8 years 4 months 13 days
Options Outstanding, Weighted Average Exercise Price (in dollars per share)	$6.26
Options Exercisable, Number of Shares	79,900
Options Exercisable, Weighted Average Exercise Price (in dollars per share)	$6.26
$6.59 - $6.59
Stock-Based Compensation
Range of exercise prices - lower limit (in dollars per share)		$6.59
Range of exercise prices - upper limit (in dollars per share)		$6.59
Options Outstanding, Number of Shares	231,407
Options Outstanding, Weighted Average Remaining Contractual Life	8 years 5 months 27 days
Options Outstanding, Weighted Average Exercise Price (in dollars per share)	$6.59
Options Exercisable, Number of Shares	70,989
Options Exercisable, Weighted Average Exercise Price (in dollars per share)	$6.59
$6.67 - $6.74
Stock-Based Compensation
Range of exercise prices - lower limit (in dollars per share)		$6.67
Range of exercise prices - upper limit (in dollars per share)		$6.74
Options Outstanding, Number of Shares	42,334
Options Outstanding, Weighted Average Remaining Contractual Life	8 years 6 months
Options Outstanding, Weighted Average Exercise Price (in dollars per share)	$6.67
Options Exercisable, Number of Shares	14,604
Options Exercisable, Weighted Average Exercise Price (in dollars per share)	$6.67
$7.69 - $7.69
Stock-Based Compensation
Range of exercise prices - lower limit (in dollars per share)		$7.69
Range of exercise prices - upper limit (in dollars per share)		$7.69
Options Outstanding, Number of Shares	207,327
Options Outstanding, Weighted Average Remaining Contractual Life	8 years 7 months 28 days
Options Outstanding, Weighted Average Exercise Price (in dollars per share)	$7.69
Options Exercisable, Number of Shares	68,622
Options Exercisable, Weighted Average Exercise Price (in dollars per share)	$7.69
$9.17 - $10.35
Stock-Based Compensation
Range of exercise prices - lower limit (in dollars per share)		$9.17
Range of exercise prices - upper limit (in dollars per share)		$10.35
Options Outstanding, Number of Shares	19,000
Options Outstanding, Weighted Average Remaining Contractual Life	8 years 9 months 18 days
Options Outstanding, Weighted Average Exercise Price (in dollars per share)	$9.98
Options Exercisable, Number of Shares	5,666
Options Exercisable, Weighted Average Exercise Price (in dollars per share)	$9.96
$3.11 - $10.35
Stock-Based Compensation
Range of exercise prices - lower limit (in dollars per share)		$3.11
Range of exercise prices - upper limit (in dollars per share)		$10.35
Options Outstanding, Number of Shares	1,175,961
Options Outstanding, Weighted Average Remaining Contractual Life	5 years 11 months 27 days
Options Outstanding, Weighted Average Exercise Price (in dollars per share)	$5.89
Options Exercisable, Number of Shares	730,899
Options Exercisable, Weighted Average Exercise Price (in dollars per share)	$5.33

StockBased_Compensation_Detail4

Stock-Based Compensation (Details 5) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Stock-based compensation
Stock-based compensation expense	$11,813,000	$10,395,000	$13,655,000
Weighted-average fair value of options granted (in dollars per share)		$3.87
Maximum number of shares	0	3,469,500	1,756,431
Stock options
Stock-based compensation
Stock-based compensation expense	790,000	866,000	838,000
Intrinsic value of stock options exercised (in dollars)	5,940,000	6,151,000	1,358,000
Total cash received from employees as a result of stock options exercised (in dollars)	2,900,000	5,100,000	3,700,000
Vesting period		4 years
Exercise of stock options under stock incentive plans (in shares)	701,220	1,427,456	714,820
Restricted stock units
Stock-based compensation
Vesting period		3 years
Performance Awards
Stock-based compensation
Stock-based compensation expense	2,370,000	1,097,000	444,000
Employee Stock Purchase Plan
Stock-based compensation
Stock-based compensation expense	948,000	597,000	802,000
Weighted-average fair value of stock units granted (in dollars per share)	$3.59	$1.96	$1.76
Offering period	12 months
Number of consecutive stock purchase periods in the offering period	2
Purchase price of shares of common stock (as a percent)	85.00%
Number of shares issued	319,000	435,000	407,000
2013 Stock Incentive Plan [Member]
Stock-based compensation
Maximum number of shares		3,469,500
Latest Tax Year [Member] | Performance Awards
Stock-based compensation
Stock-based compensation expense	1,900,000
Tax Year 2013 [Member] | Performance Awards
Stock-based compensation
Stock-based compensation expense	$500,000

Stockholders_Equity_Details

Stockholders' Equity (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Nov. 30, 2003
Stockholders' Equity Note [Abstract]
Preferred stock, shares outstanding	0	0
Preferred Stock
Authorized shares of undesignated preferred stock	5,000,000	5,000,000	5,000,000
Preferred stock par value (in dollars per share)	$0.00	$0.00	$0.00

Income_Taxes_Details

Income Taxes (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
		subsidiary
Loss before income taxes
United States	($11,557,000)	($20,675,000)	($27,796,000)
Foreign	1,008,000	1,319,000	486,000
Loss before provision (benefit) for income taxes	-10,549,000	-19,356,000	-27,310,000
Current:
Federal	-25,000	0	4,000
State	3,000	0	0
Foreign	1,138,000	1,815,000	559,000
Deferred:
Federal	78,000	159,000	-185,000
State	-89,000	0	-22,000
Foreign	-93,000	81,000	32,000
Provision (benefit) for income taxes	1,012,000	2,055,000	388,000
Reconciliation of provision (benefit) for income taxes that differs from the expected tax benefit computed by applying the statutory federal income tax rates to consolidated loss before income taxes
Federal tax at statutory rate	-3,587,000	-6,581,000	-9,286,000
State taxes, net of benefit	3,000	0	0
Non-deductible expenses	453,000	1,248,000	2,416,000
Foreign taxes	703,000	1,447,000	427,000
Current year net operating losses and other deferred tax assets for which no benefit has been recognized	4,828,000	7,320,000	7,181,000
Research and experimentation credit	-1,239,000	-1,379,000	0
Tax benefit due to the recognition of acquired deferred tax liabilities	-149,000	0	-350,000
Provision (benefit) for income taxes	1,012,000	2,055,000	388,000
Deferred tax assets
Net operating loss carryforwards and deferred start-up costs	54,712,000	53,902,000
Accrued expenses and 481(a)	5,420,000	2,161,000
Unrealized gain/loss on investments	916,000	915,000
Research and experimentation credit carryforwards	12,609,000	10,884,000
Capitalized research and experimentation costs	14,072,000	18,100,000
Deferred stock compensation	3,956,000	2,223,000
Gross deferred tax assets	91,685,000	88,185,000
Less valuation allowance	-90,598,000	-86,604,000
Total deferred tax assets, net of valuation allowance	1,087,000	1,581,000
Deferred tax liabilities
Property and equipment	-1,699,000	-1,602,000
Goodwill	-1,024,000	-887,000
Net deferred tax assets (liabilities)	-1,636,000	-908,000
Valuation allowance
Number of foreign subsidiaries for which there is no valuation allowance on deferred tax assets	2	2
Net changes for valuation allowance	4,000,000	7,800,000
Additional net deferred tax liabilities related to the various acquisitions completed during the year	900,000	0
Release of Valuation Allowance	265,000	0	350,000
Federal
Net operating loss carryforwards
Outstanding net operating loss carryforwards	169,000,000
Expiry period of net operating loss carryforwards, if remained unutilized	20 years
California
Net operating loss carryforwards
Outstanding net operating loss carryforwards	$38,000,000

Income_Taxes_Details_2

Income Taxes (Details 2) (USD $)	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013
Tax Credit Carryforward [Line Items]
Net operating loss carryforwards resulting from exercise of employee stock options	$8,900,000
Undistributed earnings of the non-U.S. subsidiaries	2,700,000
Activity related to the Company's unrecognized tax benefits
Balance at the beginning of the period	2,843,000		2,478,000
Increases related to prior year tax positions	-44,000		-175,000
Increases related to current year tax positions	270,000		222,000
Reductions to unrecognized tax benefits as a result of a lapse of applicable statue of limitations	-32,000		-32,000
Balance at the end of the period	3,037,000	[1]	2,843,000
Amount of unrecognized tax benefits included as reserve against deferred tax assets	2,700,000		2,600,000
Amount of unrecognized tax benefits included in accrued expenses	300,000		300,000
Accrued potential penalties and interest related to unrecognized tax benefits	100,000
Liability for potential penalties and interest	200,000
Federal
Tax Credit Carryforward [Line Items]
Operating Loss Carryforwards Expiration Period if Not Utilized	20 years
Research credit carryforwards | Federal
Tax Credit Carryforward [Line Items]
Research credit carryforwards	8,400,000
Expiry period of tax credit carryforward, if not utilized	20 years
Research credit carryforwards | California
Tax Credit Carryforward [Line Items]
Research credit carryforwards	$8,700,000
[1]	$2.7 million of the unrecognized tax benefits reduced deferred tax assets and $0.3 million was included in accrued expenses on the consolidated balance sheet.

Employee_Benefit_Plan_Details

Employee Benefit Plan (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Compensation and Retirement Disclosure [Abstract]
Employer matching contribution as a percentage of employee's contribution	50.00%
Maximum annual contribution to the plan made by the employer	$1,000
Expense recognized related to 401(k) tax-deferred savings plan	$272,000	$220,000

Segment_Geographic_and_Custome2

Segment, Geographic and Customer Information (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
	customer	customer	customer
	segment
Segment Reporting [Abstract]
Number of operating segments	1
Revenues by geographic area
Goodwill	$46,970	$31,207
Intangible Assets, Net (Excluding Goodwill)	17,757	16,995	21,196
Concentration Risk Number of Customers	0	0	0
Revenues	136,618	112,337	94,952
Europe [Member]
Revenues by geographic area
Goodwill	11,369
Intangible Assets, Net (Excluding Goodwill)	2,549
United States
Revenues by geographic area
Revenues	106,194	88,684	74,477
EMEA
Revenues by geographic area
Revenues	15,162	12,241	11,578
Asia Pacific
Revenues by geographic area
Revenues	8,400	5,379	4,943
Other
Revenues by geographic area
Revenues	$6,862	$6,033	$3,954

Related_Party_Transactions_Det

Related Party Transactions (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Lithium [Member]
Related party transactions
Annual subscription expensed	$62,000
Annual subscription recorded in prepaid expense and other current assets	58,000
Lithium [Member] | Two Year Hosting Agreement
Related party transactions
Agreement entered		113,000
Revenue from Related Parties		52,000
Lithium [Member] | Service Agreement
Related party transactions
Agreement entered		143,550
Revenue from Related Parties	23,550	120,000
Webcom
Related party transactions
Product modeling and maintenance of certain equipment	149,000	143,000
Subscription Arrangement [Member] | Lithium [Member]
Related party transactions
Related Party Transaction, Purchases from Related Party	120,000
Social Success Service [Member] | Lithium [Member]
Related party transactions
Related Party Transaction, Purchases from Related Party	40,000
Annual subscription expensed	17,000
Annual subscription recorded in prepaid expense and other current assets	23,000
Community Administration service [Member] | Lithium [Member]
Related party transactions
Related Party Transaction, Purchases from Related Party	$45,000