PROS (PRO) 10-K 27 Feb 15 2014 Q4 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. 24, 2015	Jun. 30, 2014
Entity Information [Line Items]
Entity Registrant Name	PROS HOLDINGS, INC.
Entity Central Index Key	1392972
Document Type	10-K
Document Period End Date	31-Dec-14
Amendment Flag	FALSE
Document Fiscal Year Focus	2014
Document Fiscal Period Focus	Q4
Current Fiscal Year End Date	-19
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		29,332,176
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Public Float			$636.30

Condensed_Consolidated_Balance

Condensed Consolidated Balance Sheets (Unaudited) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Current assets:
Cash and cash equivalents	$161,019	$44,688
Accounts and unbilled receivables, net of allowance of $XXX and $1,130, respectively	71,095	46,566
Prepaid and other current assets	8,075	6,157
Restricted Cash and Cash Equivalents, Current	100	39,718
Total current assets	240,289	137,129
Restricted cash	0	100
Property and equipment, net	15,788	15,587
Intangible Assets, Net (Excluding Goodwill)	20,195	8,232
Goodwill	21,563	7,024
Deferred Tax Assets, Net of Valuation Allowance, Noncurrent	0	10,505
Other long term assets, net	2,290	1,251
Total assets	300,125	179,828
Current liabilities:
Accounts payable	10,564	7,839
Accrued liabilities	5,355	5,210
Accrued payroll and other employee benefits	15,154	9,679
Deferred revenue	57,313	42,274
Total current liabilities	88,386	65,002
Long-term deferred revenue	1,121	2,977
Convertible Debt, Noncurrent	110,448	0
Other Liabilities, Noncurrent	1,171	546
Total liabilities	201,126	68,525
Commitments and contingencies (Note 13)
Stockholders' equity:
Preferred stock, $0.001 par value, 5,000,000 shares authorized none issued	0	0
Common stock, $0.001 par value, 75,000,000 shares authorized, XXX and 31,432,430 shares issued, respectively, XXX and 27,014,845 shares outstanding, respectively	34	33
Additional paid-in capital	134,375	106,880
Treasury stock, 4,417,585 common shares, at cost	-13,938	-13,938
Retained earnings	-19,223	18,328
Accumulated Other Comprehensive Income (Loss), Net of Tax	-2,249	0
Total stockholders' equity	98,999	111,303
Total liabilities and stockholders' equity	$300,125	$179,828

Condensed_Consolidated_Balance1

Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, except Share data, unless otherwise specified
Allowance for bad debts	$868,000	$1,060
Preferred stock - par value	$0.00	$0.00
Preferred stock - shares authorized	5,000,000	5,000,000
Preferred stock - shares issued	0	0
Common stock - par value	$0.00	$0.00
Common stock - shares authorized	75,000,000	75,000,000
Common stock - shares issued	33,477,810	32,606,228
Common stock - shares outstanding	29,060,225	28,188,643
Treasury stock - shares	4,417,585	4,417,585

Condensed_Consolidated_Stateme

Condensed Consolidated Statements of Comprehensive Income (Unaudited) (USD $)	12 Months Ended
In Thousands, except Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Revenue:
License and implementation	$58,515	$41,116	$32,968
Sales Revenue, Services, Net	49,225	48,412	35,635
Maintenance and support	54,621	46,088	40,135
Subscription and Circulation Revenue	23,468	9,221	9,053
Total license, service and maintenance revenue	131,208	98,749	77,656
Total revenue	185,829	144,837	117,791
Cost of revenue:
License and implementation	243	282	244
Cost of Services	39,955	32,492	24,329
Cost of Goods Sold, Subscription	7,334	2,122	1,257
Cost of license, service and subscription	47,532	34,896	25,830
Maintenance and support	10,554	8,239	7,955
Cost of Revenue	58,086	43,135	33,785
Gross profit	127,743	101,702	84,006
Selling and Marketing Expense	62,156	39,478	29,987
General and Administrative Expense	37,761	24,046	18,228
Operating Expenses
Research and development	43,174	32,467	27,611
Business Combination, Acquisition Related Costs	3,019	2,173	0
Tangible Asset Impairment Charges	4,040	0	0
Income from operations	-22,407	3,538	8,180
Other income:
Other Nonoperating Income (Expense)	-2,651	-265	-163
Income before income tax provision	-25,058	3,273	8,017
Income tax provision	12,493	-173	3,051
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	-37,551	3,446	4,966
Net Income (Loss) Attributable to Noncontrolling Interest	-907	0	0
Net Income (Loss) Attributable to Parent	-36,644	3,446	4,966
Net earnings per share:
Basic	($1.27)	$0.12	$0.18
Diluted	($1.27)	$0.11	$0.17
Weighted average number of shares:
Basic	28,915,496	28,004,019	27,365,731
Diluted	28,915,496	30,114,373	28,419,956
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax	-2,249	0	0
Other Comprehensive Income (Loss), Net of Tax	-2,249	0	0
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	-39,800	3,446	4,966
Comprehensive (Income) Loss, Net of Tax, Attributable to Noncontrolling Interest	-922	0	0
Comprehensive income	($38,878)	$3,446	$4,966

Condensed_Consolidated_Stateme1

Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	($37,551)	$3,446	$4,966
Net Income (Loss) Attributable to Parent	-36,644	3,446	4,966
Income Taxes Paid, Net	-233	-278	4,694
Operating activities:
Depreciation, Depletion and Amortization	10,443	4,307	2,286
Amortization of Financing Costs and Discounts	329	0	0
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	5,000	4,189	2,188
Share-based compensation	22,665	16,272	9,645
Excess tax benefits on share-based compensation	0	-2,940	-1,686
Tax Benefit from Stock Options Exercised	-110	2,931	1,573
Deferred income tax	12,638	-2,776	962
Provision for doubtful accounts	-192	300	-326
Tangible Asset Impairment Charges	4,040	0	0
Changes in operating assets and liabilities:
Accounts and unbilled receivables	-14,026	-7,492	-4,609
Prepaid expenses and other assets	-3,383	1,204	2,215
Accounts payable	-3,104	2,885	-790
Accrued liabilities	-1,080	1,002	1,700
Accrued payroll and other employee benefits	3,289	1,050	2,879
Deferred revenue	7,796	-3,218	5,837
Net cash provided by operating activities	1,754	16,971	24,652
Investing activities:
Purchases of property and equipment	-7,499	-3,401	-7,514
Capitalized Software Development Costs for Software Sold to Customers	-2,305	-2,874	-2,013
Increase in restricted cash	39,718	-39,389	0
Net cash used in investing activities	7,866	-58,766	-9,527
Financing activities:
Exercise of stock options	1,105	3,327	1,354
Excess tax benefits on share-based compensation	0	2,940	1,686
Proceeds from Stock Plans	335	0	0
Tax withholding related to net share settlement of restricted stock units	-13,089	-3,342	-2,814
Noncontrolling Interest, Increase from Business Combination	-6,147	0	0
Business combination, payment of contingent consideration	-2,225	0	0
Proceeds from Convertible Debt	138,631	0	0
Proceeds from Issuance of Warrants	17,106	0	0
Purchase of convertible bond hedge	-29,411	0	0
Debt Issuance Cost	0	0	-250
Net cash (used in) provided by financing activities	106,305	2,925	-24
Effect of Exchange Rate on Cash and Cash Equivalents	406	0	0
Net increase in cash and cash equivalents	116,331	-38,870	15,101
Cash and cash equivalents:
Beginning of period	44,688	83,558	68,457
End of period	161,019	44,688	83,558
Interest Paid	-243	-87	-68
Capital Expenditures Incurred but Not yet Paid	1,140	2,045	1,425
SignalDemand [Member]
Investing activities:
Payments to Acquire Businesses, Net of Cash Acquired	0	13,102	0
Cameleon Acquistion [Member]
Investing activities:
Payments to Acquire Businesses, Net of Cash Acquired	($22,048)	$0	$0

Consolidated_Statement_of_Shar

Consolidated Statement of Shareholders Equity (USD $)	Total	Stockholders' Equity, Total [Member]	Additional Paid-in Capital [Member]	Treasury Stock [Member]	Retained Earnings [Member]	Common Stock [Member]
Stockholders' Equity Attributable to Parent at Dec. 31, 2011		$73,943,000	$77,934,000	($13,938,000)	$9,916,000	$31,000
Common stock - shares outstanding, beginning balance at Dec. 31, 2011						27,014,845
Treasury stock - shares, beginning balance at Dec. 31, 2011				4,417,585
Accumulated Other Comprehensive Income (Loss), Net of Tax	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock Issued During Period, Value, New Issues						126,604
Exercise of stock options		1,354,000
Proceeds from Stock Options Exercised	1,354,000		1,354,000
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures						407,398
Stock Issued During Period, Value, Restricted Stock Award, Gross		-2,813,000	-2,814,000			1,000
Proceeds and Excess Tax Benefit from Share-based Compensation		1,574,000	1,574,000
Proceeds from Issuance of Warrants	0
Purchase of convertible bond hedge	0
Share-based Compensation	9,645,000	9,645,000	9,645,000
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax	0
Net Income (Loss) Attributable to Parent	4,966,000	4,966,000	0		4,966,000
Net Income (Loss) Attributable to Noncontrolling Interest	0
Stockholders' Equity Attributable to Parent at Dec. 31, 2012		88,669,000	87,693,000	-13,938,000	14,882,000	32,000
Common stock - shares outstanding, ending balance at Dec. 31, 2012						27,548,847
Treasury stock - shares, ending balance at Dec. 31, 2012				4,417,585
Accumulated Other Comprehensive Income (Loss), Net of Tax	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock Issued During Period, Value, New Issues						354,973
Exercise of stock options		3,327,000				1,000
Proceeds from Stock Options Exercised	3,327,000		3,326,000
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures						284,823
Stock Issued During Period, Value, Restricted Stock Award, Gross		-3,342,000	-3,342,000
Proceeds and Excess Tax Benefit from Share-based Compensation		2,931,000	2,931,000
Proceeds from Issuance of Warrants	0
Purchase of convertible bond hedge	0
Share-based Compensation	16,272,000	16,272,000	16,272,000
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax	0
Net Income (Loss) Attributable to Parent	3,446,000	3,446,000	0		3,446,000
Net Income (Loss) Attributable to Noncontrolling Interest	0
Stockholders' Equity Attributable to Parent at Dec. 31, 2013	111,303,000	111,303,000	106,880,000	-13,938,000	18,328,000	33,000
Common stock - shares outstanding, ending balance at Dec. 31, 2013	28,188,643					28,188,643
Treasury stock - shares, ending balance at Dec. 31, 2013	4,417,585			4,417,585
Accumulated Other Comprehensive Income (Loss), Net of Tax	-2,249,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock Issued During Period, Value, New Issues						214,162
Exercise of stock options		1,105,000
Proceeds from Stock Options Exercised	1,105,000		1,105,000
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures						644,028
Stock Issued During Period, Value, Restricted Stock Award, Gross		-13,088,000	-13,089,000			1,000
Stock Issued During Period, Shares, Employee Stock Purchase Plans	13,392
Proceeds and Excess Tax Benefit from Share-based Compensation		-110,000	335,000
Proceeds from Issuance of Warrants	17,106,000
Change in equity - purchase of convertible bond hedge	-29,411,000
Purchase of convertible bond hedge	29,411,000
Share-based Compensation	22,665,000	22,845,000	22,845,000
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax	-2,249,000
Net Income (Loss) Attributable to Parent	-36,644,000	-37,551,000
Net Income (Loss) Attributable to Noncontrolling Interest	-907,000
Cumulative earnings previously allocated to NCI and re-allocated to Parent's equity	907,000
Stockholders' Equity Attributable to Parent at Dec. 31, 2014	$98,999,000	$98,999,000	$134,375,000	($13,938,000)	($19,223,000)	$34,000
Common stock - shares outstanding, ending balance at Dec. 31, 2014	29,060,225					29,060,225
Treasury stock - shares, ending balance at Dec. 31, 2014	4,417,585			4,417,585

Organization_and_Nature_of_Ope

Organization and Nature of Operations	12 Months Ended
	Dec. 31, 2014
Organization and Nature of Operations [Abstract]
Organization and nature of operations	Organization and Nature of Operations
	PROS Holdings, Inc., a Delaware corporation, through its operating subsidiaries (the "Company"), provides big data software applications that are designed to help companies outperform in their markets by using big data to sell more effectively. The Company applies data science to unlock buying patterns and preferences within transaction data to reveal which opportunities are most likely to close, which offers are most likely to sell and which prices are most likely to win. The Company offers big data software applications to analyze, execute, and optimize sales, pricing, quoting, rebates and revenue management. The Company also provides professional services to implement its software applications as well as business consulting. In addition, the Company provides product maintenance and support to its customers to receive unspecified upgrades, maintenance releases and bug fixes during the term of the support period on a when-and-if-available basis. The Company provides its big data software applications to enterprises across a range of industries, including manufacturing, distribution, services, and travel.

Summary_of_Significant_Account

Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2014
Accounting Policies [Abstract]
Significant Accounting Policies [Text Block]	Summary of Significant Accounting Policies
	Principles of consolidation and basis of presentation
	The Consolidated Financial Statements include the accounts of the Company, and its wholly-owned subsidiaries. All significant intercompany transactions and balances have been eliminated in consolidation. The Consolidated Financial Statements of the Company have been prepared in accordance with generally accepted accounting principles in the United States ("GAAP").
	Certain reclassifications of previously recorded amounts have been made to conform to the current period presentation, such reclassifications impacted the classification of components of cost of revenue, but did not have an impact on our results of operations, cash flows, or financial position.
	Dollar amounts
	The dollar amounts presented in the tabular data within these footnote disclosures are stated in thousands of dollars, except per share amounts, or as noted within the context of each footnote disclosure.
	Use of estimates
	The Company’s management makes estimates and assumptions in the preparation of its audited Consolidated Financial Statements in conformity with GAAP. These estimates and assumptions may affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the audited Consolidated Financial Statements and the reported amounts of revenue and expense during the reporting periods. Actual results could differ from those estimates. The complexity of the estimation process and issues related to the assumptions, risks and uncertainties inherent in the application of the percentage-of-completion method of revenue recognition affects the amount of revenue, expenses, unbilled receivables and deferred revenue. Numerous internal and external factors can affect estimates. Estimates are also used for, but not limited to, receivables, allowance for doubtful accounts, useful lives of assets, depreciation and amortization, the fair value of assets acquired and liabilities assumed for business combinations, income taxes and deferred tax asset valuation, valuation of stock options, other current liabilities and accrued liabilities.
	Cash and cash equivalents
	The Company considers all highly liquid investments with an original maturity of three months or less at the time of purchase, or have the ability to be settled in cash within a period of three months, to be cash equivalents. The Company has a cash management program that provides for the investment of excess cash balances, primarily in short-term money market instruments.
	Financial instruments
	The carrying amount of the Company’s financial instruments, which include cash equivalents, short-term investments, receivables and accounts payable, approximates their fair values at December 31, 2014 and 2013. For additional information on the Company’s fair value measurements, see Note 9 to the Consolidated Financial Statements.
	Prepaid expenses and other assets
	Prepaid expenses and other assets consist primarily of short-term deferred tax assets, prepaid income taxes, deferred project costs and prepaid third-party license fees.
	Property and equipment, net
	Property and equipment are recorded at cost, less accumulated depreciation. Maintenance, repairs and minor replacements are charged to expense as incurred. Significant renewals and betterments are capitalized. Depreciation on property and equipment, with the exception of leasehold improvements, is recorded using the straight-line method over the estimated useful lives of the assets. Depreciation on leasehold improvements is recorded using the shorter of the lease term or useful life. When property is retired or disposed of, the cost and related accumulated depreciation are removed from the accounts and any resulting gains or losses are reflected in the Consolidated Statements of Comprehensive Income in the period of disposal.
	Internal-use software
	Costs incurred to develop internal-use software during the application development stage are capitalized, stated at cost, and depreciated using the straight-line method over the estimated useful lives of the assets. Application development stage costs generally include salaries and personnel costs and third-party contractor expenses associated with internal-use software development, configuration, coding and testing. Capitalized internal-use software is included in property and equipment, net in the Consolidated Balance Sheets.
	Impairment of long-lived assets
	Long-lived assets are reviewed for impairment whenever an event or change in circumstances indicates that the carrying amount of an asset or group of assets may not be recoverable. The impairment review includes comparison of future cash flows expected to be generated by the asset or group of assets with the associated assets’ carrying value. If the carrying value of the asset or group of assets exceeds its expected future cash flows (undiscounted and without interest charges), an impairment loss is recognized to the extent that the carrying amount of the asset exceeds its fair value. During the year ended December 31, 2014, the Company recorded a full impairment of $4.0 million related to capitalized internal-use software associated with the expected future cash flows. The Company did not record any impairment charges in any of the years ended December 31, 2013 and 2012.
	Intangible assets and goodwill
	Intangible assets that have finite lives are amortized over their useful lives and are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable. During this review, the Company reevaluates the significant assumptions used in determining the original cost and estimated lives of long-lived assets. Although the assumptions may vary from asset to asset, they generally include operating results, changes in the use of the asset, cash flows and other indicators of value. Management then determines whether the remaining useful life continues to be appropriate or whether there has been an impairment of long-lived assets based primarily upon whether expected future undiscounted cash flows are sufficient to support the assets’ recovery. If impairment exists, the Company would adjust the carrying value of the asset to fair value, generally determined by a discounted cash flow analysis.
	Goodwill represents the excess of the purchase consideration over the net of the acquisition-date fair value of identifiable assets acquired, including identifiable intangible assets, and liabilities assumed in connection with business combinations. Goodwill is not amortized, but is evaluated for impairment annually, or whenever events or changes in circumstances indicate that the carrying value may not be recoverable.
	Goodwill is assessed for impairment as of November 30 of each fiscal year, or more frequently if events or changes in circumstances indicate that the fair value of the Company’s reporting unit has been reduced below its carrying value. When conducting the annual goodwill impairment assessment, a three step process is used. The first step is to perform an optional qualitative evaluation as to whether it is more likely than not that the fair value of the Company’s reporting unit is less than its carrying value, using an assessment of relevant events and circumstances. In performing this assessment, the Company is required to make assumptions and judgments including but not limited to an evaluation of macroeconomic conditions as they relate to the business, industry and market trends, as well as the overall future financial performance of the reporting unit and future opportunities in the markets in which it operates. If it is determined that it is not more likely than not that the fair value of the reporting unit is less than its carrying value, no additional tests are required to be performed in assessing goodwill for impairment. However, if the Company concludes otherwise or elects not to perform the qualitative assessment, the Company performs a second step, consisting of a quantitative assessment of goodwill impairment. This quantitative assessment requires us to estimate the fair value of the reporting unit and compare the estimated fair value to its respective carrying value (including goodwill) as of the date of the impairment test. The third step, employed for the reporting unit failing the second step, is used to measure the amount of any potential impairment and compares the implied fair value of the reporting unit with the carrying amount of goodwill. Based on the results of the qualitative review of goodwill performed as of November 30, 2014, the Company did not identify any indicators of impairment. As such, the second and third steps described above were not necessary.
	Research and development
	Research and development costs for software sold to customers is expensed as incurred. These costs include salaries and personnel costs, including employee benefits, third-party contractor expenses, software development tools, an allocation of facilities and depreciation expenses and other expenses in developing new solutions and upgrading and enhancing existing solutions.
	Treasury stock
	The Company is authorized to make treasury stock purchases in the open market pursuant to the share repurchase program, which was approved by its Board of Directors on August 28, 2008. The Company accounts for the purchase of treasury stock under the cost method. For additional information on the Company’s stock repurchase program, see Note 10 to the Consolidated Financial Statements. There were no treasury stock repurchases for the years ended December 31, 2014, 2013 and 2012.
	Revenue recognition
	The Company derives its revenue from the licensing and implementation of software solutions and associated software maintenance and support. To a lesser extent, the Company’s revenue includes nonsoftware related hosting services. The Company’s arrangements with customers typically include: (a) license fees paid for the use of software solutions either in perpetuity or over a specified term and implementation fees for configuration, implementation and training services and (b) maintenance and support fees related to technical support and software updates. If there is significant uncertainty about contract completion or collectability is not reasonably assured, revenue is deferred until the uncertainty is sufficiently resolved or collectability is reasonably assured. In addition, revenue is recognized when persuasive evidence of an arrangement exists, delivery has occurred and fees are fixed or determinable.
	In determining whether professional services revenue should be accounted for separately from license revenue, the Company evaluates whether the professional services are considered essential to the functionality of the software using factors such as: the nature of its software products; whether they are ready for use by the customer upon receipt; the nature of professional services; the availability of services from other vendors; whether the timing of payments for license revenue coincides with performance of services; and whether milestones or acceptance criteria exist that affect the realizability of the software license fee.
	If the Company determines that professional services revenue should not be accounted for separately from license revenue, the license revenue is recognized together with the professional services revenue using the percentage-of-completion method or completed contract method. The completed contract method is also used for contracts where there is a risk over final acceptance by the customer or for contracts that are short-term in nature.
	The percentage-of-completion method is measured by the percentage of man-days incurred during the reporting period as compared to the estimated total man-days necessary for each contract for implementation of the software solutions. The Company measures performance under the percentage-of-completion method using total man-day method based on current estimates of man-days to complete the project. The Company believes that for each such project, man-days expended in proportion to total estimated man-days at completion represents the most reliable and meaningful measure for determining a project’s progress toward completion. Under our fixed-fee arrangements, should a loss be anticipated on a contract, the full amount is recorded when the loss is determinable.
	The Company also licenses software solutions under term license agreements that typically include maintenance during the license term. When maintenance is included for the entire term of the license, there is no renewal rate and the Company has not established vendor specific objective evidence ("VSOE") of fair value for the maintenance on term licenses. For term license agreements, revenue and the associated costs are deferred until the delivery of the solution and recognized ratably over the remaining license term. Revenue from term licenses represented approximately 2.9%, 3.6% and 4.8% of total revenue for the years ended December 31, 2014, 2013 and 2012, respectively.
	For arrangements that include cloud-based services, the Company allocates the arrangement consideration between the service and other elements and recognize the cloud-based services fee ratably beginning on the date the customer commences use of those services and continues through the end of the service term.
	The Company’s customer arrangements typically contain multiple elements that include software license, professional services and post-implementation maintenance and support. For multiple element arrangements containing our nonsoftware services, the Company must (1) determine whether and when each element has been delivered; (2) determine fair value of each element using the selling price hierarchy of VSOE of fair value, third party evidence ("TPE"), or BESP, as applicable, and (3) allocate the total price among the various elements based on the relative selling price method.
	For multiple-element arrangements that contain software and nonsoftware elements such as the Company's hosting service offerings, the Company allocates revenue between the software and software related elements as a group and any nonsoftware elements based on a relative fair value allocation.  The Company determines fair value for each deliverable using this hierarchy and utilize VSOE of fair value if it exists.
	In certain instances, the Company may not be able to establish VSOE for all deliverables in an arrangement with multiple elements. This may be due to infrequently selling each element separately, not pricing solutions or services within a narrow range, or only having a limited sales history. In addition, third party evidence may not be available. When the Company is unable to establish selling prices using VSOE or TPE, it uses BESP in the allocation of arrangement consideration. The objective of BESP is to determine the price at which the Company would transact a sale if the product or service were sold on a stand-alone basis. For transactions that only include software and software-related elements, the Company continues to account for such arrangements under the software revenue recognition standards which require it to establish VSOE of fair value to allocate arrangement consideration to multiple deliverables.
	Maintenance and support revenue includes post-implementation customer support and the right to unspecified software updates and enhancements on a when and if available basis. The Company recognizes revenue from maintenance arrangements ratably over the period in which the services are provided.
	Revenue that has been recognized, but for which the Company has not invoiced the customer, is recorded as unbilled receivables. Invoices that have been issued before revenue has been recognized are recorded as deferred revenue in the accompanying consolidated balance sheets.
	Foreign currency
	The Company has contracts denominated in foreign currencies and therefore a portion of the Company’s revenue is subject to foreign currency risks. Gains and losses from foreign currency transactions, such as those resulting from the settlement of receivables, are classified in other expense, net included in the accompanying Consolidated Statements of Comprehensive Income.
	The functional currency of Cameleon is its local currency. The financial statements of this subsidiary are translated into U.S. dollars using period-end rates of exchange for assets and liabilities, historical rates of exchange for equity, and average rates of exchange for the period for revenue and expenses. Translation gains (losses) are recorded in accumulated other comprehensive income (loss) as a component of stockholders’ equity.
	Noncash share based compensation
	The Company has two noncash share based compensation plans, the 1999 Equity Incentive Plan ("1999 Stock Plan") and the 2007 Equity Incentive Plan ("2007 Stock Plan"), which authorize the discretionary granting of various types of stock awards to key employees, officers, directors and consultants. The 1999 Stock Plan was terminated in March 2007 for purposes of granting any future equity awards. The 2007 Stock Plan was adopted in March 2007. The Company may provide noncash share based compensation through the grant of: (i) restricted stock awards; (ii) restricted stock unit awards; (iii) stock options; (iv) stock appreciation rights; (v) phantom stock; and (vii) performance awards. Also in February 2014, the Company granted inducement awards in an aggregate amount of up to 308,250 shares in accordance with NYSE Rule 303A.08. These inducement awards were in the form of RSUs and MSUs granted to our recently appointed Chief Operating Officer and RSUs granted to certain new employees in connection with our acquisitions of Cameleon and SignalDemand.
	To date, the Company has granted stock options, stock appreciation rights, restricted stock units, time based and performance based, and market stock units. The Company issues common stock from its pool of authorized stock upon exercise of stock options, settlement of stock appreciation rights and market stock units or upon vesting of restricted stock units. The following table presents the number of awards outstanding for each award type as of December 31, 2014 and 2013:
		Year Ended December 31,
	Award type	2014	2013
	Stock options	961	1,160
	Restricted stock units (time based)	1,830	1,543
	Restricted stock units (performance based)	34	—
	Stock appreciation rights	673	721
	Market stock units	444	469
	Stock options. The Company did not grant stock options during 2014 and 2013. The fair value of each stock option was estimated on the date of grant using the Black-Scholes option pricing model.
	Restricted stock units. The fair value of the restricted stock units ("RSUs") is based on the closing price of the Company’s stock on the date of grant and is amortized over the vesting period.
	Stock appreciation rights. Stock appreciation rights ("SARs") will be settled in stock at the time of exercise and vest over four years from the date grant. The Company used the Black-Scholes option pricing model to estimate the fair value of its SARs. The determination of the fair value of SARs utilizing the Black-Scholes model is affected by the Company’s stock price and a number of assumptions, including expected volatility, expected life, deliver risk-free interest rate and expected dividends. The Company estimates the expected volatility of common stock at the date of grant based on a combination of its historical volatility and the average volatility of comparable companies. The expected life of the SARs noncash share based payment awards is a historical weighted average of the expected lives of similar securities of comparable public companies. The risk-free interest rate assumption is based on observed interest rates appropriate for the terms of the Company’s awards. The dividend yield assumption is based on our expectation of paying no dividends.
	Market stock units. The market stock units ("MSUs") are performance-based awards that vest based upon the Company’s relative shareholder return. The actual number of MSUs that will be eligible to vest is based on the total shareholder return of the Company relative to the total shareholder return of the Russell 2000 Index ("Index") over a three year period ending December 31, 2015, December 31, 2016 and June 30, 2017 ("Performance Period"), respectively. The MSUs granted in 2013 vest on January 1, 2016, and the MSUs granted in 2014 vest on January 1, 2017 and July 1, 2017, respectively. The maximum number of shares issuable upon vesting is 200% of the MSUs initially granted based on the average price of our common stock relative to the Index during the Performance Period. The Company estimates the fair value of MSUs on the date of grant using a Monte Carlo simulation model. The determination of fair value of the MSUs is affected by the Company’s stock price and a number of assumptions including the expected volatility of the Company’s stock and the Index, its risk-free interest rate and expected dividends. The Company’s expected volatility at the date of grant was based on the historical volatilities of the Company and the Index over the Performance Period.
	As the Company issues stock options and SARs, it evaluates the assumptions used to value our stock option awards and SARs. If factors change and the Company employs different assumptions, noncash share based compensation expense may differ significantly from what has been recorded in the past. If there are any modifications or cancellations of the underlying unvested securities, the Company may be required to accelerate, increase or cancel any remaining unearned noncash share based compensation expense. Future noncash share based compensation expense and unearned noncash share based compensation will increase to the extent that the Company grants additional equity awards to employees.
	At December 31, 2014, there were an estimated $45.6 million of total unrecognized compensation costs related to noncash share based compensation arrangements. These costs will be recognized over a weighted average period of 2.4 years. For further discussion of the Company’s noncash share based compensation plans, see Note 11 to the Consolidated Financial Statements.
	Product warranties
	The Company generally issues warranties for 90 days following the first use of the software in a production environment, depending on the contract, for software licenses and implementation services. In the Company’s experience, warranty costs have been insignificant.
	Income taxes
	The Company uses the asset and liability method to account for income taxes, including recognition of deferred tax assets and liabilities for the anticipated future tax consequences attributable to differences between financial statement amounts and their respective tax basis. The Company reviews its deferred tax assets for recovery. A valuation allowance is established when the Company believes that it is more-likely than not that some portion of its deferred tax assets will not be realized. Changes in the valuation allowance from period to period are included in the Company’s tax provision in the period of change.
	The Company accounts for uncertain income tax positions recognized in an enterprise’s financial statements in accordance with the income tax topic of the ASC issued by the FASB. This interpretation requires companies to use a prescribed model for assessing the financial recognition and measurement of all tax positions taken or expected to be taken in its tax returns. This guidance provides clarification on recognition, classification, interest and penalties, accounting in interim periods, disclosures and transition. The Company recognized accrued interest and penalties related to income taxes as a component of income tax expense. For additional information regarding the Company’s income taxes, see Note 12 to the Consolidated Financial Statements.
Segment reporting
The Company reports as one operating segment with the Chief Executive Officer ("CEO") acting as the Company’s chief operating decision maker. The Company’s CEO reviews financial information presented on a consolidated basis for purposes of allocating resources and evaluating financial performance. The Company has a single reporting unit, and there are no segment managers who are held accountable for operations, operating results or components below the consolidated unit level.
Earnings per share
The Company computes basic earnings (loss) per share by dividing net income (loss) attributable to common stockholders by the weighted average number of common shares outstanding. Diluted earnings (loss) per share is computed by dividing net income (loss) attributable to common stockholders by the weighted average number of common shares and dilutive potential common shares then outstanding. Diluted earnings per share reflect the assumed conversion of all dilutive securities, using the treasury stock method. Dilutive potential common shares consist of shares issuable upon the exercise of stock options, shares of unvested restricted stock units, and settlement of stock appreciation rights. When the Company incurs a net loss, the effect of the Company’s outstanding stock options, stock appreciation rights and restricted stock units are not included in the calculation of diluted earnings (loss) per share as the effect would be anti-dilutive. Accordingly, basic and diluted net loss per share are identical.
Recent accounting pronouncements
In May 2014, the FASB issued Accounting Standards Update (ASU) 2014-09, "Revenue from Contracts with Customers (Topic 606)," which supersedes nearly all existing revenue recognition guidance under GAAP. The new guidance will be effective for fiscal 2017, including interim periods within that reporting period, using one of two prescribed retrospective methods. No early adoption is permitted. The Company is currently in the process of evaluating the impact of the adoption of ASU 2014-09 on their consolidated financial statements and related disclosures.

Business_Combination

Business Combination	12 Months Ended
	Dec. 31, 2014
Business Combinations [Abstract]
Business Combination Disclosure [Text Block]	Business Combination
	Cameleon Software, SA
	In October 2013, the Company entered into a tender offer agreement with Cameleon, indicating the Company's intent to acquire Cameleon through the tender offer for all of the outstanding share capital of Cameleon in an all cash tender offer. In January 2014, the Company announced that the initial tender offer for Cameleon was successful and upon completion of the initial tender offer, the Company controlled 81.7% of Cameleon’s common stock and 94.0% of Cameleon’s outstanding warrants, inclusive of the commitments from Cameleon's management regarding their Cameleon free shares. As a result of shares purchased by the Company in the market following the completion of the tender, the Company's exercise of Cameleon warrants in July 2014, and the Company's completion of a second tender in November 2014, the Company controlled 100% of Cameleon's common stock as of December 31, 2014. The Company acquired Cameleon for total cash consideration of approximately $32 million, net of cash acquired.
	During the year ended December 31, 2014, the Company incurred acquisition-related costs of $1.7 million, consisting primarily of the cost for the retention of key employees, and advisory and legal fees.
	The Company recorded revenue for Cameleon of approximately $11.9 million in the consolidated statement of operations from the acquisition date through December 31, 2014.
	All of the assets acquired and the liabilities assumed in the transaction have been recognized at their acquisition date fair values at January 8, 2014.
	The acquisition initially resulted in $16.2 million of goodwill. During the year ended December 31, 2014, the fair value of the other tangible assets and liabilities was increased and resulted in a net change in goodwill of $0.5 million.
	The allocation of the purchase price for Cameleon is updated as follows (in thousands):
	Cash and cash equivalents	$	7,086
	Accounts receivables	10,395
	Prepaid and other assets	1,418
	Intangible assets	18,653
	Goodwill	15,717
	Accounts payable and accrued liabilities	(12,539		)
	Deferred revenue	(5,392		)
	Non-controlling interest	(6,204		)
	Net assets acquired	$	29,134
	The following are the identifiable intangible assets acquired and their respective useful lives (in thousands):
					Useful Life
		Amount			(years)
	Trade Name	$	1,020		8
	Customer Relationships	1,455			5-Feb
	Maintenance Relationships	3,808			8
	Developed Technology	11,147			7
	Other	1,223			2
	Total	$	18,653
	In performing the purchase price allocation, the Company considered, among other factors, its anticipated future use of the acquired assets, analysis of historical financial performance, and estimates of future cash flows from Cameleon's products and services. The allocation resulted in acquired intangible assets of $18.7 million. The acquired intangible assets consisted of developed technology, customer and maintenance relationships, trade name and other and were valued using the income approach in which the after-tax cash flows are discounted to present value. The cash flows are based on estimates used to price the transaction, and the discount rates applied were benchmarked with reference to the implied rate of return from the transaction model as well as the weighted average cost of capital. Additionally, the Company assumed certain liabilities in the acquisition, including deferred revenue to which a fair value of $5.4 million was ascribed using a cost-plus profit approach.
	Liabilities assumed include $2.7 million related to the Company's offer to pay an additional €0.15 per share cash premium to the Cameleon stock and warrant holders tendering their shares and warrants in the initial tender offer if the Company acquired at least 95% of the share capital and voting rights of Cameleon on a fully diluted basis on or before December 31, 2014. The Company recorded this liability at fair value as the Company expected to meet this threshold prior to December 31, 2014. The Company settled the contingent liability related to the share premium in December 2014 for $2.2 million. In addition, the net assets acquired include contingent consideration of $1.4 million related to the committed purchase of free shares owned by Cameleon management.
	Goodwill of $15.7 million represents the excess of the purchase price over the fair value of the underlying net tangible and identifiable intangible assets, and represents the expected synergistic benefits of the transaction, the knowledge and experience of Cameleon's workforce in place, and the expectation that the combined company’s complementary products will significantly broaden the Company’s CPQ solution offering. The Company believes the combined company will benefit from a broader global presence and, with the Company’s direct sales force and larger channel coverage, significant cross selling opportunities. None of the goodwill is expected to be currently deductible for tax purposes. In accordance with applicable accounting standards, goodwill will not be amortized but instead will be tested for impairment at least annually, or, more frequently if certain indicators are present. In the event that the management of the combined company determines that the value of goodwill has become impaired, the combined company will incur an accounting charge for the amount of the impairment during the fiscal quarter in which the determination is made.
	SignalDemand, Inc.
	In December 2013, the Company acquired SignalDemand, Inc. for total cash consideration of $13.5 million.
	During the year ended December 31, 2014 and 2013, the Company incurred acquisition-related costs of $1.3 million and $0.4 million, respectively, consisting primarily of the cost for the retention of key employees, and advisory and legal fees.
	The Company recorded revenue for SignalDemand of approximately $8.7 million and $0.2 million in the consolidated statement of operations for the year ended December 31, 2014 and 2013, respectively.
	All of the assets acquired and the liabilities assumed in the transaction have been recognized at their acquisition date fair values at December 16, 2013.
	The acquisition initially resulted in $7.0 million of goodwill. During the year ended December 31, 2014, the fair value of the other tangible assets and liabilities were adjusted and resulted in a net change of $0.2 million to goodwill.
	The final allocation of the total purchase price for SignalDemand is as follows (in thousands):
	Current assets	$	881
	Deferred tax asset - current	2,752
	Noncurrent assets	193
	Intangibles	8,300
	Goodwill	7,175
	Deferred tax asset - noncurrent	2,447
	Accounts payable and accrued liabilities	(1,560		)
	Deferred revenue	(6,688		)
		$	13,500
	The following are the identifiable intangible assets acquired and their respective useful lives:
					Useful Life
		Amount			(years)
	Developed technology	$	4,600		7
	Internally developed technology	160			2
	Customer relationships	3,500			8
	Trade name	40			2
	Total	$	8,300
	In performing the purchase price allocation, the Company considered, among other factors, its intention for future use of the acquired assets, analyses of historical financial performance, and estimates of future cash flows from SignalDemand's products and services. The allocation resulted in acquired intangible assets of $8.3 million. The acquired intangible assets consisted of developed technology, customer relationships and trade name and were valued using the income approach in which the after-tax cash flows are discounted to present value. The cash flows are based on estimates used to price the transaction, and the discount rates applied were benchmarked with reference to the implied rate of return from the transaction model as well as the weighted average cost of capital. Additionally, the Company assumed certain liabilities in the acquisition, including deferred revenue to which a fair value of $6.7 million was ascribed using a cost-plus profit approach.
	The Company assumed $5.2 million of net deferred tax assets at the acquisition date. The deferred tax assets primarily relate to net operating losses and other expenses accrued but not expensed for tax purposes.
	The excess of the purchase price over the estimated amounts of net assets as of the effective date of the acquisition was allocated to goodwill. The factors contributing to the recognition of the amount of goodwill are based on several strategic and synergistic benefits that are expected to be realized from the SignalDemand acquisition. These benefits include the expectation that the combined company’s complementary products will significantly broaden the Company’s offerings in sales optimization solutions. The combined company will benefit from a broader global presence, and with the Company’s direct sales force and larger channel coverage, the combined company anticipates significant crosselling opportunities. None of the goodwill is expected to be currently deductible for tax purposes.
	Pro Forma Financial Information
	The unaudited financial information in the table below summarizes the combined results of operations of the Company, Cameleon and SignalDemand, on a pro forma basis, as though the Company had acquired Cameleon and SignalDemand on January 1, 2013. In addition, the unaudited financial information in the table below includes the effect of SignalDemand as if it had occurred as of January 1, 2012. The pro forma information for all periods presented also includes the effect of business combination accounting resulting from the acquisition, including amortization charges from acquired intangible assets.
		Year Ended December 31,
	(in thousands)	2014			2013			2012
	Total revenue	$	186,081		$	168,974		$	120,345
	Net loss attributable to PROS Holdings, Inc.	(36,776		)	(3,647		)	(3,252		)
	Earnings per share - basic and diluted	$	(1.27	)	$	(0.13	)	$	(0.12	)

Noncontrolling_interest_Notes

Noncontrolling interest (Notes)	12 Months Ended
	Dec. 31, 2014
Noncontrolling Interest [Abstract]
Noncontrolling Interest Disclosure [Text Block]	Non-controlling interest
	The following table presents a rollforward of the non-controlling interest from the date of acquisition of Cameleon on January 8, 2014 through December 31, 2014 (in thousands):
	Beginning balance as of January 8, 2014	$	6,204
	Change in Parent's ownership in the subsidiary, net of cumulative earnings previously allocated to NCI and re-allocated to Parent's equity	(5,282		)
	Net loss allocated to non-controlling interest	(907		)
	Foreign currency translation adjustment	(15		)
	Ending balance as of December 31, 2014	$	—

Goodwill_and_Intangible_Assets

Goodwill and Intangible Assets	12 Months Ended
	Dec. 31, 2014
Goodwill and Intangible Assets [Abstract]
Goodwill and Intangible Assets Disclosure [Text Block]	Goodwill and Intangible Assets
	The change in the carrying amount of goodwill for the years ended December 31, 2014 and 2013, was as follows (in thousands):
	Balance as of December 31, 2012	$	—
	Goodwill acquired	7,024
	Balance as of December 31, 2013	7,024
	Goodwill acquired	15,717
	Purchase accounting adjustments	151
	Foreign currency translation adjustments	(1,329		)
	Balance as of December 31, 2014	$	21,563
	The increase in goodwill for the year ended December 31, 2014 was primarily the result of the acquisition of Cameleon. The goodwill balance related to Cameleon is denominated in local currency.
	The increase in goodwill for the year ended December 31, 2013 was a result of the acquisition of SignalDemand.
	Intangible assets consisted of the following as of December 31, (in thousands):
				31-Dec-13
		Weighted average useful life (years)		Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount
	Developed technology	7		$	4,600	$	27	$	4,573
	Internally developed technology	2		160		3		157
	Customer relationships	8		3,500		37		3,463
	Trade name	2		40		1		39
	Total			$	8,300	$	68	$	8,232
				31-Dec-14
		Weighted average useful life (years)		Gross Carrying Amount		Accumulated Amortization*		Net Carrying Amount
	Developed technology	7		$	14,567	$	2,082	$	12,485
	Internally developed technology and other	2		1,254		620		634
	Maintenance Relationship	8		3,591		788		2,803
	Customer relationships	7		4,853		1,399		3,454
	Trade name	8		952		133		819
	Total			$	25,217	$	5,022	$	20,195
	*Cumulative foreign currency translation adjustments, reflecting movement in the currencies of the underlying entities, decreased total intangible assets by approximately $1.5 million as of December 31, 2014.
	Customer relationships are amortized over a period ranging from two to eight years. Trade names are amortized over a period ranging from two to eight years.
	Intangible asset amortization expense for the years ended December 31, 2014 and 2013 was $5.2 million and $0.1 million, respectively. As of December 31, 2014, the expected future amortization expense for the acquired intangible assets for each of the five succeeding years and thereafter was as follows (in thousands):
	Year Ending December 31,		Amount
	2015		$	4,429
	2016		3,254
	2017		3,000
	2018		3,000
	2019		2,873
	Thereafter		3,639
	Total amortization expense		$	20,195

Accounts_Receivable_and_Contra

Accounts Receivable and Contracts in Progress	12 Months Ended
	Dec. 31, 2014
Accounts Receivable and Contracts in Progress [Abstract]
Loans, Notes, Trade and Other Receivables Disclosure [Text Block]	Accounts receivable and contracts in progress
	Accounts receivable at December 31, 2014 and 2013, consists of the following:
		December 31,
		2014			2013
	Accounts receivable	$	64,004		$	40,842
	Unbilled receivables	7,959			6,784
	Total receivables	71,963			47,626
	Less: Allowance for doubtful accounts	(868		)	(1,060		)
	Accounts receivable, net	$	71,095		$	46,566
	The bad debt expense reflected in general and administrative expenses in the accompanying Consolidated Statements of Comprehensive Income for the years ended December 31, 2014, 2013 and 2012, totaled approximately $(0.1) million, $0.4 million and $(0.3) million, respectively.
	Activity related to contracts in progress at December 31, 2014 and 2013, is summarized as follows:
		December 31,
		2014			2013
	Costs and estimated earnings recognized to date	$	349,874		$	221,905
	Progress billings to date	(400,349		)	(260,372		)
	Total	$	(50,475	)	$	(38,467	)
	The foregoing table reflects the aggregate invoiced amount of all contracts in progress and maintenance as of the respective dates, including amounts that have already been collected.
	These amounts are included in the accompanying Consolidated Balance Sheets at December 31, 2014 and 2013, as follows:
		December 31,
		2014			2013
	Unbilled receivables	$	7,959		$	6,784
	Deferred revenue	(58,434		)	(45,251		)
	Total	$	(50,475	)	$	(38,467	)
	At December 31, 2014 and 2013, the Company had approximately $20.2 million and $11.4 million, respectively, in deferred maintenance and support revenue, which is reflected above within deferred revenue and progress billing.
Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]	Accounts receivable at December 31, 2014 and 2013, consists of the following:
		December 31,
		2014			2013
	Accounts receivable	$	64,004		$	40,842
	Unbilled receivables	7,959			6,784
	Total receivables	71,963			47,626
	Less: Allowance for doubtful accounts	(868		)	(1,060		)
	Accounts receivable, net	$	71,095		$	46,566

Earnings_per_Share

Earnings per Share	12 Months Ended
	Dec. 31, 2014
Earnings Per Share [Abstract]
Earnings per Share	Earnings per share
	The following table sets forth the computation of basic and diluted earnings per share:
		For the Year Ended December 31,
		2014			2013		2012
	Numerator:
	Net (loss) income attributable to PROS Holdings, Inc.	$	(36,644	)	$	3,446	$	4,966
	Denominator:
	Weighted average shares (basic)	28,915			28,004		27,366
	Dilutive effect of stock options, restricted stock units and stock appreciation rights	—			2,110		1,054
	Weighted average shares (diluted)	28,915			30,114		28,420
	Basic earnings per share	$	(1.27	)	$	0.12	$	0.18
	Diluted earnings per share	$	(1.27	)	$	0.11	$	0.17
	Approximately 452,000, 14,000 and 416,000 of potential common shares have not been considered in the diluted earnings per calculation for the years ended December 31, 2014, 2013 and 2012, respectively, as the effect would be anti-dilutive.
	Since the Company will settle the principal amount of our Senior Notes (see Note 13) in cash, the treasury stock method is used for calculating any potential dilutive effect of the conversion spread on diluted net income per share, if applicable. The conversion spread will have a dilutive impact on diluted net income per share of common stock when the average market price of common stock for a given period exceeds the conversion price of $33.79 per share.

Property_and_Equipment_net

Property and Equipment, net	12 Months Ended
	Dec. 31, 2014
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment Disclosure [Text Block]	Property and equipment, net
	Property and equipment, net as of December 31, 2014 and 2013 consists of the following:
			December 31,
		Estimated useful life	2014			2013
	Furniture and fixtures	7-10 years	$	2,874		$	2,423
	Computers and equipment	3-5 years	15,662			10,857
	Software	2-6 years	5,068			4,322
	Capitalized internal-use software development costs	3 years	2,639			5,064
	Leasehold improvements	Shorter of lease term	5,625			4,568
		or useful life
	Construction in progress		5			305
	Property and equipment, gross		31,873			27,539
	Less: Accumulated depreciation and amortization		(16,085		)	(11,952		)
	Property and equipment, net		$	15,788		$	15,587
	Depreciation and amortization was approximately $5.0 million, $4.2 million and $2.2 million for the years ended December 31, 2014, 2013 and 2012, respectively. During the year ended December 31, 2014, the Company had no disposal of fully depreciated assets. During the years ended December 31, 2013 and 2012, the Company disposed of approximately $1.5 million and $0.8 million, respectively, of fully depreciated assets. As of December 31, 2014 and 2013, the Company had approximately $6.7 million and $3.8 million, respectively, of fully depreciated assets in use.
	During the years ended December 31, 2014 and 2013, the Company capitalized internal-use software development costs of approximately $2.5 million and $3.1 million, respectively, related to its cloud-based offerings. During the years ended December 31, 2014 and 2013, approximately $1.6 million and $1.7 million, respectively, of capitalized internal-use software development cost were subject to amortization. Included in accumulated depreciation and amortization is approximately $0.2 million and $0.5 million, respectively, of amortization related to capitalized internal-use software development costs.
	During the year ended December 31, 2014, the Company recorded $4.0 million of impairment charges related to internally developed software.  The impairment resulted from a reduction of projected cash flows for product groups based on revisions to the Company's projections during the year and was recorded to reduce the carrying value to fair value. This reduction reflected changes to the Company's plans for certain product groups in connection with the integration of acquisitions and changes in future product launches and support. No impairment was recorded for the years ended December 31, 2013 and 2012, respectively.

Fair_Value_Measurements

Fair Value Measurements	12 Months Ended
	Dec. 31, 2014
Fair Value Disclosures [Abstract]
Fair Value Disclosures [Text Block]	Fair value measurements
	The Company adopted fair value measurements guidance for financial and nonfinancial assets and liabilities. The guidance defines fair value, establishes a framework for measuring fair value in GAAP and expands disclosures about fair value measurements.
	The guidance defines fair value as the price that would be received to sell an asset, or paid to transfer a liability, in an orderly transaction between market participants. The guidance establishes a fair value hierarchy for valuation inputs that gives the highest priority to quoted prices in active markets for identical assets or liabilities and the lowest priority to unobservable inputs. The fair value hierarchy is as follows:
	Level 1: Unadjusted quoted prices in active markets that are accessible at the measurement date for identical, unrestricted assets or liabilities;
	Level 2: Quoted prices for similar assets or liabilities in markets that are not active or inputs which are observable, either directly or indirectly, for substantially the full term of the asset or liability; and
	Level 3: Prices or valuation techniques that require inputs that are both significant to the fair value measurement and unobservable (i.e., supported by little or no market activity).
	A portion of the Company’s existing cash and cash equivalents are invested in short-term interest bearing obligations with original maturities less than 90 days, principally various types of money market funds. In addition, the Company had short-term investments consisting of certificates of deposit. The Company does not enter into investments for trading or speculative purposes.
	At December 31, 2014 and 2013, the Company had approximately $135.3 million and $21.0 million invested in treasury money market funds, respectively. These investments are required to be measured at fair value on a recurring basis. The fair value of these accounts is determined based on quoted market prices, which represents level 1 in the fair value hierarchy. The Company's diversified money market funds, treasury money market funds and short-term investments have a fair value that is not materially different from its carrying amount. The fair value of the Company's Senior Notes is classified in the Level 2 hierarchy.

Stockholders_Equity

Stockholders Equity	12 Months Ended
	Dec. 31, 2014
Stockholders' Equity Attributable to Parent [Abstract]
Stockholders' Equity Note Disclosure [Text Block]	Stockholders’ equity
	Stock repurchase
	On August 25, 2008, the Company’s Board of Directors approved a stock repurchase program that authorized the Company to purchase up to $15.0 million of the Company’s outstanding shares of common stock. Under the board-approved repurchase program, share purchases may be made from time to time in the open market or through privately negotiated transactions depending on market conditions, share price, trading volume and other factors, and such purchases, if any, will be made in accordance with applicable insider trading and other securities laws and regulations. These repurchases may be commenced or suspended at any time or from time to time without prior notice.
	The Company did not repurchase any shares under this plan for the years ended December 31, 2014 and 2013. The remaining amount available to purchase common stock under this plan was $10.0 million as of December 31, 2014.

Noncash_Sharebased_Compensatio

Noncash Share-based Compensation	12 Months Ended
	Dec. 31, 2014
Noncash Share-based Compensation [Abstract]
Noncash Share-based Compensation	Noncash share based compensation
	Employee noncash share based compensation plans:
	The Company has two noncash share based compensation plans; the 1999 Stock Plan and the 2007 Stock Plan. These plans authorize the discretionary granting of various types of stock awards to key employees, officers, directors and consultants. The discretionary issuance of stock awards generally contains vesting provisions ranging from one to four years.
	1999 Stock Plan. Under the 1999 Stock Plan, the Company is authorized to grant options to purchase shares of common stock to its employees, directors and consultants at the Company’s discretion. The Company’s 1999 Stock Plan was terminated in March 2007 for purposes of granting any future equity awards. There were issued and outstanding stock options to purchase 33,325 shares of the Company’s common stock under the 1999 Stock Plan as of December 31, 2014.
	2007 Stock Plan. The Company’s 2007 Stock Plan was adopted in March 2007. The purpose of the 2007 Stock Plan is to promote the Company’s long-term growth and profitability. The 2007 plan is intended to make available incentives that will help the Company to attract, retain and reward employees whose contributions are essential to its success. Under the 2007 Stock Plan, the Company’s employees, officers, directors and other individuals providing services to the Company or any of its affiliates are eligible to receive awards. The 2007 Stock Plan has an evergreen provision that allows for an annual increase equal to the lesser of (i) 3.5% of the Company’s outstanding shares (ii) 900,000 shares or (iii) any lesser amount determined by the Compensation Committee of the Board of Directors. The Company may provide these incentives through the grant of: (i) restricted stock awards; (ii) restricted stock unit awards; (iii) stock options; (iv) stock appreciation rights; (v) phantom stock; and (vii) performance awards.
	In February 2014, the Company increased the number of shares available to grant by 900,000 under the evergreen provision in the Company’s 2007 Stock Plan, increasing the number shares reserved for issuance to 8,168,000. As of December 31, 2014, the Company had outstanding equity awards to acquire 3,634,758 shares of its common stock held by the Company’s employees, directors and consultants under the 2007 Stock Plan. Included in the outstanding equity awards are 961,377 of stock options, 1,631,041 RSUs, 673,068 SARs and 369,272 MSUs held by the Company’s employees, directors and consultants. As of December 31, 2014, 867,109 shares remain available for grant under the 2007 Stock Plan. As of December 31, 2014, there were no restricted stock awards or phantom stock issued under the 2007 Stock Plan.
	In February 2014, the Company granted inducement awards in an aggregate amount of up to 308,250 shares in accordance with NYSE Rule 303A.08. These inducement awards were in the form of RSUs and MSUs granted to our recently appointed Chief Operating Officer and RSUs granted to certain new employees in connection with our acquisitions of Cameleon and SignalDemand. As of December 31, 2014, the Company had outstanding equity inducement awards to acquire 308,250 shares of its common stock held by the Company's employees and officers. Included in the outstanding equity awards are 233,250 RSUs (time and performance based) and 75,000 MSUs.
	Noncash share based compensation expense for all noncash share based payment awards granted is determined based on the grant-date fair value of the award. The Company recognizes compensation expense, net of estimated forfeitures, which represents noncash share based awards expected to vest on a straight-line basis over the requisite service period of the award, which is generally the vesting term. Noncash share based awards typically vest over four years. Stock options are generally granted for a ten-year term. The Company estimates forfeiture rates based on its historical experience for grant years where the majority of the vesting terms have been satisfied. Changes in estimated forfeiture rates are recognized through a cumulative catch-up adjustment in the period of change and thus impact the amount of noncash share based compensation expense to be recognized in future periods.
	Noncash share based compensation expense is allocated to expense categories on the Consolidated Statements of Comprehensive Income. The following table summarizes noncash share based compensation expense, net of amounts capitalized, for the years ended December 31, 2014, 2013 and 2012.
		For the Year Ended December 31,
		2014			2013			2012
	Share-based compensation:
	Cost of revenue	$	3,469		$	2,071		$	1,451
	Operating expenses:
	Selling and marketing	5,142			3,834			2,335
	General and administrative	9,375			7,055			3,938
	Research and development	4,679			3,139			1,921
	Total included in operating expenses	19,196			14,028			8,194
	Total share-based compensation expense	$	22,665		$	16,099		$	9,645
	At December 31, 2014, there was an estimated $45.6 million of total unrecognized compensation costs related to noncash share based compensation arrangements. These costs will be recognized over a weighted average period of 2.4 years.
	Stock Options:
	The following table summarizes the Company’s stock option activity for the year ended December 31, 2014:
		Number of		Weighted			Weighted		Aggregate
		shares		average			average		intrinsic
		under option		exercise price			remaining		value (1)
							contractual
							term (year)
	Outstanding, December 31, 2013	1,160		$	11.12
	Granted	—		—
	Exercised	-196		7.37
	Forfeited	—		—
	Expired	-3		14.93
	Outstanding, December 31, 2014	961		$	11.87		2.8		$	15,006
	Vested and exercisable at December 31, 2014	961		$	11.87		2.8		$	15,006
	(1) The aggregate intrinsic value was calculated based on the positive difference between the estimated fair value of the Company’s common stock on December 31, 2014 of $27.48 and the grant date fair value.
	For the years ended December 31, 2014 and 2013, respectively, the Company did not grant any stock options. The total intrinsic value of stock options exercised for the years ended December 31, 2014, 2013 and 2012 was $4.5 million, $5.2 million and $0.6 million, respectively.
	RSUs:
	The Company has granted RSUs under the 2007 Stock Plan and as part of the February 2014 inducement awards grant. RSUs include both time-based awards as well as performance-based awards in which the number of shares that vest are based upon the revenue expected to be earned by the Company from binding customer agreements for the provision of CPQ solutions. Generally, the time-based RSUs granted to employees, directors and consultants vest in equal annual installments over a one to four year period from the grant date. At December 31, 2014 there were 1,864,291 shares related to RSUs outstanding and unvested.
	The following table summarizes the Company's unvested RSUs as of December 31, 2014, and changes during the year then ended, is as follows:
		Number of		Weighted			Weighted		Aggregate
		shares		average			average		intrinsic value
				grant date			remaining		-1
				fair value			contractual
							term (year)
	Unvested at December 31, 2013	1,543		$	18.25
	Granted	1,028		33.46
	Vested	(582	)	17.42
	Forfeited	(125	)	25.28
	Unvested at December 31, 2014	1,864		$	26.67		4.65		$	51,231
	Expected to vest at December 31, 2014	1,822		$	26.6		4.64		$	50,067
	(1) The aggregate intrinsic value was calculated based on the fair value of the Company’s common stock on December 31, 2014 of $27.48.
	The weighted average grant-date fair value of the RSUs granted during the years ended December 31, 2014, 2013 and 2012 was $33.46, $20.08 and $18.65, respectively.
	SARs:
	The Company has granted SARs under the 2007 Stock Plan. The SARs will be settled in stock at the time of exercise and vest four years from the date of grant subject to the recipient’s continued employment with the Company. The number of shares issued upon the exercise of the SARs is calculated as the difference between the share price of the Company’s stock on the date of exercise and the date of grant multiplied by the number of SARs divided by the share price on the exercise date.
	The following table summarizes the Company's SARs activity for the year ended December 31, 2014:
		Stock		Weighted			Weighted		Aggregate
		appreciation		average			average		intrinsic value
		rights		exercise price			remaining		-1
							contractual
							term (year)
	Outstanding, December 31, 2013	721		$	10.74
	Granted	—		—
	Exercised	(48	)	10.59
	Forfeited	—		—
Expired	—		—
Outstanding, December 31, 2014	673		$	10.75		5.82		$	11,260
Exercisable at December 31, 2014	662		$	10.74		5.81		$	11,083
Vested and expected to vest at December 31, 2014	673		$	10.75		5.82		$	11,260
(1) The aggregate intrinsic value was calculated based on the positive difference between the estimated fair value of the Company’s common stock on December 31, 2014 of $27.48 and the exercise price of the underlying SARs.
The Company did not grant SARs in 2014, 2013 and 2012.
MSUs:
In 2014, 2013 and 2012 , the Company granted MSUs to certain executives and senior level employees under the 2007 Stock Plan as as part of the 2014 inducement awards grant. The MSUs are performance-based awards that vest based upon the Company’s relative shareholder return. The actual number of MSUs that will be eligible to vest is based on the total shareholder return of the Company relative to the total shareholder return of the Index over over a two or three year period ending December 31, 2013, December 31, 2015, December 31, 2016 and June 30, 2017 ("Performance Period"), respectively. The MSUs granted in 2012 vested on January 1, 2014, the MSUs granted in 2013 vest on January 1, 2016, and the MSUs granted in 2014 vest on January 1, 2017 and July 1, 2017. The MSUs maximum number of shares issuable upon vesting is 200% of the MSUs initially granted.
	Number of		Weighted			Weighted		Aggregate
	unvested awards		average			average		intrinsic
			grant date fair value			remaining		value (1)
						contractual
						term (year)
Unvested at December 31, 2013	469		34.24
Granted	198		$	48.54
Exercised	(205	)	26.08
Forfeited	(18	)	43.07
Expired	—		—
Unvested at December 31, 2014	444		$	44.03		6.3		$	12,209
(1) The aggregate intrinsic value was calculated based on the positive difference between the estimated fair value of the Company’s common stock on December 31, 2014 of $27.48 and the grant date fair value of the underlying MSUs.
The Company estimates the fair value of MSUs on the date of grant using a Monte Carlo simulation model. The determination of fair value of the MSUs is affected by the Company's stock price and a number of assumptions including the expected volatilities of the Company's stock and the Index, its risk-free interest rate and expected dividends. The Company's expected volatility at the date of grant was based on the historical volatilities of the Company and the Index over the Performance Period. The Company did not estimate a forfeiture rate for the MSUs due to the limited size, the vesting period and nature of the grantee population and the lack of history of granting this type of award.
Significant assumptions used in the Monte Carlo simulation model for MSUs granted during December 31, 2014, 2013 and 2012 are as follows:
	For the Year Ended December 31,
	2014	2013	2012
Volatility	50.86%	57%	61%
Risk-free interest rate	0.68%	0.35%	0.28%
Expected option life in years	2.88	2.84	1.9
Dividend yield	—	—	—
The assumptions related to fiscal year 2014 are presented on weighted average basis for the various awards granted throughout the period.
Employee stock purchase plan:
In June 2013, the Board of Directors authorized an Employee Stock Purchase Plan (“ESPP”) which provides for eligible employees to purchase shares on an after-tax basis in an amount between 1% and 10% of their annual pay: (i) on June 30 of each year at a 5% discount of the fair market value of our common stock on January 1 or June 30, whichever is lower, and (ii) on December 31 of each year at a 5% discount of the fair market value of our common stock on July 1 or December 31, whichever is lower. An employee may not purchase more than $5,000 in either of the six-month measurement periods described above or more than $10,000 annually. During the year ended December 31, 2014, the Company issued 13,392 shares under the ESPP. As of December 31, 2014, 486,608 shares remain authorized and available for issuance under the ESPP. As of December 31, 2014, the Company held approximately $0.4 million on behalf of employees for future purchases under the ESPP and this amount was recorded in accrued liabilities in the Company's consolidated balance sheet.

Income_Tax_Disclosure

Income Tax Disclosure	12 Months Ended
	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Income Tax Disclosure [Text Block]	Income taxes
	The income tax provision (benefit) consisted of the following for the years ended December 31, 2014, 2013 and 2012:
		Year Ended December 31,
		2014			2013			2012
	Current:
	Federal	$	(935	)	$	2,444		$	2,015
	State and Foreign	790			160			74
		(145		)	2,604			2,089
	Deferred:
	Federal	12,334			(2,651		)	1,030
	State	304			(126		)	(68		)
	Income tax provision (benefit)	$	12,493		$	(173	)	$	3,051
	The differences between the effective tax rates reflected in the total provision for income taxes and the U.S. federal statutory rate of 34% for the years ended December 31, 2014, 2013 and 2012, respectively, were as follows:
		Year Ended December 31,
		2014			2013			2012
	Provision at the U.S. federal statutory rate	$	(8,520	)	$	1,113		$	2,726
	Increase (decrease) resulting from:
	State income taxes, net of federal taxes	49			(583		)	(84		)
	Nondeductible expenses	653			235			214
	Acquisition-related expense	434			606			—
	Purchase accounting - Statutory to GAAP income adjustment	990			—			—
	Foreign Tax Expense	837			135			111
	Domestic production activities	—			(47		)	(146		)
	Nondeductible noncash share based compensation	1,784			1,308			622
	Incremental benefits from prior years' tax credits	59			(1,254		)	(439		)
	Incremental benefits for tax credits	(3,259		)	(2,165		)	(111		)
	Change in tax rate/income subject to lower tax rates and other	(40		)	(30		)	158
	Change in valuation allowance	19,506			509			—
		$	12,493		$	(173	)	$	3,051
	The Company’s historical effective tax rate has been lower than the statutory rate of 34% largely due to the application of the R&E tax credit. The Company’s effective tax rate was a provision of 50%, a benefit of 5% and a provision of 38% for the years ended December 31, 2014 , 2013 and 2012, respectively. During the year ended December 31, 2014 the Company's effective tax rate was impacted by a valuation allowance, nondeductible officer's compensation and other nondeductible expenses, partially offset by the R&E credit.
	As of December 31, 2014 and 2013, the Company had an income tax receivable of approximately $1.4 million and $0.6 million, respectively, which is classified as prepaid and other current assets in the accompanying Consolidated Balance Sheet. As of December 31, 2014 and 2013, the Company had approximately $0.8 million and $0.1 million of foreign tax credits ("FTC") arising from foreign taxes paid.
	The tax effects of temporary differences that give rise to significant portions of the deferred tax assets and liabilities as of December 31, 2014 and 2013 are as follows:
		Year Ended December 31,
		2014			2013
	Current deferred tax assets:
	State deferred	$	185		$	(7	)
	Accruals not currently deductible	178			(191		)
	Current deferred revenue	1,664			2,601
	Total current deferred tax assets	2,027			2,403
	Less: valuation allowance	(1,953		)	(270		)
	Total current deferred tax assets	74			2,133
	Noncurrent deferred tax (liability) assets:
	Property and equipment	(2,186		)	(1,786		)
	Noncash share based compensation	9,095			7,808
	State deferred	217			292
	Capitalized software	(897		)	(1,541		)
	Amortization	(2,193		)	(2,366		)
	R&E tax credit carryforwards	4,316			2,708
	Deferred revenue	56			431
	Federal Net Operating Losses ("NOLs")	5,733			4,724
	State NOLs	537			813
	State Credits	1,240			509
	Foreign NOLs	10,111			—
	Foreign tax credit carryforward	837			—
	Other	(21		)	—
	Total noncurrent deferred tax assets	26,845			11,592
	Less: valuation allowance	(26,919		)	(1,087		)
	Total noncurrent deferred tax (liability) assets	(74		)	10,505
	Total net deferred tax assets	$	—		$	12,638
	The current net deferred tax assets and noncurrent net deferred tax liability are classified as prepaids and other current assets, other long-term assets and other noncurrent liabilities, respectively, in the accompanying Consolidated Balance Sheets.
	The Company has federal and state net operating loss carryforwards pursuant to the acquisition of SignalDemand, Cameleon, and current year losses.  Internal Revenue Code Section 382 ("Section 382") places certain limitations on the annual amount of U.S. net operating loss carryforwards that can be utilized when a change of ownership occurs. The Company believes the 2013 acquisition of SignalDemand and the 2014 acquisition of Cameleon were changes in ownership pursuant to Section 382. According to French law the net operating loss carryforwards of Cameleon are not subject to ownership change limitations.
	Taking into account the 382 annual limitation and current year losses, the federal and foreign net operating loss and R&E tax credit carryforward amount available to be used in future periods is approximately $68.4 million and $5.6 million, respectively. The Company’s net operating losses will begin to expire in 2029, R&D credits will begin to expire in 2033, and foreign tax credits will begin to expire in 2024. Also included in net operating losses are $33.8 million of carryforwards attributable to Cameleon which have no expiration.
	The Company’s $16.4 million deferred tax asset related to NOL carryforwards is net of $7.2 million of unrealized excess tax benefits related to stock-based compensation. The impact of the excess tax benefit will be recognized in additional paid-in capital upon utilization of the Company’s NOL and tax credits carryforward.
	As of December 31, 2014, the Company determined it was more likely than not that it will be unable to fully utilize the majority of its U.S. and state deferred tax assets. As a result, the Company has recorded a valuation allowance against those assets to the extent that they cannot be realized through net operating loss carrybacks to prior years. This conclusion was reached in the fourth quarter of 2014 as a result of the convertible debt transaction. Because of the impact of interest charges associated with the convertible debt on the Company’s financial projections, the Company did not believe it would have sufficient income to support the utilization of its U.S. deferred tax assets of $16.2 million. The majority of the remaining valuation allowance was attributable to the Cameleon acquisition.Valuation allowances were established for Cameleon upon acquisition primarily due to historical losses. This valuation allowance will be evaluated periodically and will be reversed partially or in whole if business results and the economic environment have sufficiently improved to support realization of some or all of the Company's deferred tax assets.
Undistributed earnings of the Company’s foreign subsidiaries are considered permanently reinvested and, accordingly, no provision for U.S. federal or state income taxes has been provided thereon. The cumulative amount of undistributed earnings of the Company’s non-U.S. subsidiaries was approximately $0.3 million for the year ended December 31, 2014.
The determination of the deferred tax liability, which requires complex analysis of international tax situations related to repatriation, is not practical at this time. The Company is presently investing in international operations located in Europe and North America. The Company is funding the working capital needs of its foreign operations through its U.S. operations. In the future, the Company will utilize its foreign undistributed earnings, as well as continued funding from its U.S. operations, to support its continued foreign investment.
For the years ended December 31, 2014, 2013 and 2012, the Company had $0.4 million, $0.3 million and $0.3 million, respectively, of net unrecognized tax benefits which, if recognized, would impact our effective tax rate. The Company has accrued $56,000, $3,000 and $3,000 for the payment of interest and penalties as of December 31, 2014, 2013 and 2012, respectively. The Company believes that it is reasonably possible that there will be no change in our unrecognized tax benefits within the next twelve months. The Company is currently under examination for the 2009 U.S. federal income tax return, of which an unrecognized tax benefit has been recorded.  The Company files tax returns in the United States federal jurisdiction and various state and foreign jurisdictions. The Company is subject to U.S. federal income tax examination for the calendar tax years 2011, 2012 and 2013 and state and foreign income tax examination for various years depending on the statutes of limitation of those jurisdictions.
The following table sets forth the changes to the Company's unrecognized tax benefit for the year ended December 31, 2014, 2013 and 2012:
		Year Ended December 31,
		2014			2013			2012
Beginning Balance		$	349		$	349		$	349
Changes based on tax positions related to prior year		46			—			—
Ending Balance		$	395		$	349		$	349
The table above has been updated to reflect gross tax liability, exclusive of interest and penalties and other offsetting amounts.

Convertible_debt_Notes

Convertible debt (Notes)	12 Months Ended
	Dec. 31, 2014
Debt Instrument [Line Items]
Long-term Debt [Text Block]	Convertible Senior Notes
	2.0% Convertible Senior Notes Due December 1, 2019
	In December 2014, the Company issued $143.8 million aggregate principal amount of 2.0% convertible Senior Notes (the "Senior Notes") due December 1, 2019 , unless earlier purchased by the Company or converted. Interest is payable semiannually in arrears on June 1 and December 1 of each year, commencing on June 1, 2015.
	The Senior Notes are governed by an Indenture between the Company, as issuer, and Wilmington Trust, National Association, as trustee. The Senior Notes are the Company's general unsecured obligations and will rank senior in right of payment to all of the Company's indebtedness that is expressly subordinated in right of payment to the Senior Notes, will rank equally in right of payment with all of Company's existing and future liabilities that are not so subordinated, will be effectively junior to any of the Company’s secured indebtedness to the extent of the value of the assets securing such indebtedness and will be structurally subordinated to all indebtedness and other liabilities (including trade payables but excluding intercompany obligations owed to the Company or its subsidiaries).
	Upon conversion of the Senior Notes, the Company will pay or deliver, as the case may be, cash, shares of the Company's common stock or a combination of cash and shares of common stock, at the Company's election.
	The initial conversion rate for the Senior Notes will be 29.5972 shares of common stock per $1,000 in principal amount of Senior Notes, equivalent to a conversion price of approximately $33.79 per share of common stock. Throughout the term of the Senior Notes, the conversion rate may be adjusted upon the occurrence of certain events. Holders of the Senior Notes will not receive any cash payment representing accrued and unpaid interest upon conversion. Accrued but unpaid interest will be deemed to be paid in full upon conversion rather than canceled, extinguished or forfeited. Holders may convert their Senior Notes at their option at any time prior to the close of business on the business day immediately preceding September 1, 2019 only under the following circumstances:
	•	during any calendar quarter commencing after the calendar quarter ending on March 31, 2015, if the last reported sale price of the common stock for at least 20 trading days (whether or not consecutive) during a period of 30 consecutive trading days ending on the last trading day of the immediately preceding calendar quarter is greater than or equal to 130% of the conversion price on each applicable trading day;
	•	during the five consecutive business day period immediately following any five consecutive trading day period in which the trading price per $1,000 principal amount of Senior Notes for each trading day of the measurement period was less than 98% of the product of the last reported sale price of our common stock and the conversion rate on each such trading day; or
	•	upon the occurrence of specified corporate events.
	On or after September 1, 2019 to the close of business on the second scheduled trading day immediately preceding the maturity date, holders may convert all or any portion of their Senior Notes regardless of the above. Upon conversion, the Company will pay or deliver cash, shares of its common stock or a combination of cash and shares of its common stock, at its election, as described in the indenture.
	As of December 31, 2014, the Senior Notes are not yet convertible.
	In accounting for the issuance of the Senior Notes, the Company separated the Senior Notes into liability and equity components. The carrying amount of the liability component was calculated by measuring the fair value of a similar liability that does not have an associated convertible feature. The carrying amount of the equity component representing the conversion option was determined by deducting the fair value of the liability component from the face value of the Senior Notes as a whole. The excess of the principal amount of the liability component over its carrying amount ("debt discount") is amortized to interest expense over the term of the Senior Notes. The equity component is not remeasured as long as it continues to meet the conditions for equity classification.
	In accounting for the transaction costs related to the Senior Notes issuance, the Company allocated the total amount incurred to the liability and equity components based on their relative values. Issuance costs attributable to the liability component, totaling $4.3 million, are being amortized to expense over the term of the Senior Notes, and issuance costs attributable to the equity component, totaling $1.2 million, were netted with the equity component in stockholders' equity. Additionally, the Company recorded a nominal deferred tax asset on a portion of the equity component transaction costs which are deductible for tax purposes.
	The Senior Notes consist of the following (in thousands):
			As of December 31, 2014
	Liability component:
	Principal		$	143,750
	Less: debt discount, net of amortization		(33,302		)
	Net carrying amount		$	110,448
	Equity component (1)		$	28,714
	(1) Recorded in the consolidated balance sheet within additional paid-in capital, net of $1.2 million issuance cost in equity.
	The following table sets forth total interest expense recognized related to the Senior Notes (in thousands):
			Year Ended December 31, 2014
	2.0% coupon		$	162
	Amortization of debt issuance costs		46
	Amortization of debt discount		283
	Total		$	491
	As of December 31, 2014, the fair value of the Senior Notes was $114.7 million. The fair value was determined based on inputs that are observable in the market or that could be derived from, or corroborated with, observable market data, including our stock price, interest rates and carrying value of the debt instrument (carrying value excludes the equity component of the Company's convertible notes classified in equity).
	Note Hedge
	To minimize the impact of potential economic dilution upon conversion of the Senior Notes, the Company entered into convertible note hedge transactions with respect to its common stock (the "Note Hedge"). In December 2014, the Company paid an aggregate amount of $29.4 million for the Note Hedge. The Note Hedge will expire upon maturity of the Senior Notes. The Note Hedge is intended to offset the potential dilution upon conversion of the Senior Notes and/or offset any cash payments the Company is required to make in excess of the principal amount upon conversion of the Senior Notes in the event that the market value per share of the Company's common stock, as measured under the Senior Notes, is greater than the strike price of the Note Hedge, which initially corresponds to the conversion price of the Notes and is subject to anti-dilution adjustments substantially similar to those applicable to the conversion rate of the Senior Notes.
	Warrant
	Separately, in December 2014, the Company entered into warrant transactions (the "Warrant"), whereby the Company sold warrants to acquire shares of the Company's common stock at a strike price of $45.48 per share. The Company received aggregate proceeds of $17.1 million from the sale of the Warrant. If the average market value per share of the Company's common stock for the reporting period, as measured under the Warrant, exceeds the strike price of the Warrant, the Warrant will have a dilutive effect on the Company's earnings per share. The Warrant is a separate transaction, entered into by the Company and is not part of the Senior Notes or the Note Hedge, and has been accounted for as part of additional paid-in capital. Holders of the Senior Notes and Note Hedge will not have any rights with respect to the Warrant.

Credit_Facility

Credit Facility	12 Months Ended
	Dec. 31, 2014
Credit Facility Disclosure [Abstract]
Debt Disclosure [Text Block]	Credit Facility
	In July 2012, the Company, through its wholly owned subsidiary PROS, Inc., entered into a $50 million secured Credit Agreement (the "Revolver") with Wells Fargo Bank, N.A. ("Wells Fargo"). In connection with the issuance of the Senior Notes, PROS, Inc. amended the Revolver in December 2014 to, among other things, allow for the Company’s issuance of the Senior Notes, Note Hedge and Warrant.
	The Revolver is for a five year term, with interest paid at the end of the applicable one month, three month or six month interest period at a rate per annum equal to LIBOR plus an applicable margin of 1.5% to 2.25% or the Federal Funds Rate plus an applicable margin of 1.5% to 2.25%. Borrowings under the Revolver are collateralized by a first priority interest in and lien on all of the Company's material assets.
	The Revolver contains affirmative and negative covenants, including covenants which restrict the ability of the Company to, among other things, create liens, incur additional indebtedness and engage in certain other transactions, in each case subject to certain exclusions. In addition, the Revolver contains certain financial covenants which become effective in the event the Company's availability under the revolver plus cash and cash equivalents falls below $20 million or upon the occurrence of an event of default. As of December 31, 2014, the Company was in compliance with all financial covenants in the Revolver.
	As of December 31, 2014 and 2013, $0.1 million and $0.2 million of unamortized debt issuance costs related to the Revolver is included in other long-term assets in the consolidated balance sheets. For both years ended December 31, 2014 and 2013, $0.1 million of debt issuance cost amortization is included in Other Expense, net in the consolidated statements of comprehensive income.
	As of December 31, 2014, the Company had no outstanding borrowings under the Revolver.

Commitments_and_Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2014
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and contingencies
	Litigation:
	In the ordinary course of the Company’s business, the Company regularly becomes involved in contract and other negotiations and, in more limited circumstances, becomes involved in legal proceedings, claims and litigation. The outcomes of these matters are inherently unpredictable. The Company is not currently involved in any outstanding litigation that it believes, individually or in the aggregate, will have a material adverse effect on its business, financial condition, results of operations or cash flows.
	Indemnification:
	The Company’s software agreements generally include certain provisions for indemnifying customers against liabilities if the Company’s software solutions infringe a third party’s intellectual property rights. To date, the Company has not incurred any losses as a result of such indemnifications and has not accrued any liabilities related to such obligations in the Company’s Consolidated Financial Statements.
	Lease commitments:
	The Company leases office space and office equipment under noncancelable operating leases that expire at various dates. The Company incurred approximately $3.3 million, $2.1 million and $2.0 million of total rent expense for the years ended December 31, 2014, 2013 and 2012, respectively. As of December 31, 2014, the future minimum lease commitments related to lease agreements were as follows:
	Year Ending December 31,	Amount
	2015	$	2,843
	2016	1,822
	2017	573
	2018	90
	2019 and thereafter	—
	Total minimum lease payments	$	5,328
	The Company's headquarters are located in Houston, Texas, where it leases approximately 98,000 square feet of office space. The Company also has small regional office in London, England; Paris, France; Toulouse, France; Munich, Germany; San Francisco, California; Skokie, Illinois; and Austin, Texas. In July 2011, the Company entered into a third amendment to its corporate office lease in Houston, TX (the "Third Lease Amendment").  The Third Lease Amendment, among other things, provides for a five year extension, until September 30, 2016, and an increase in the square footage. The Third Lease Amendment has two options to extend the term of the lease for an additional 72 months. Also, the Third Lease Amendment provides for an early termination at any time after July 31, 2013. In June 2012, the Company entered into a fourth amendment to its corporate office lease in Houston, TX which increased the square footage of the corporate offices to approximately 90,000 square feet, and provided an option to an additional 7,411 square feet.
	In August 2012, the Company entered into a ten year lease for approximately 3,100 square feet of office space in London, United Kingdom. The lease provides an option to terminate the lease in August 2015.
	In June 2011, the Company entered into a five year lease for approximately 3,300 square feet of office space in Austin, Texas. This lease expires in September 2016.
	As part of the SignalDemand acquisition, the Company assumed a lease for approximately 6,600 square feet of office in San Francisco, California. This lease expires in November 2015.
	As part of the Cameleon acquisition, the Company assumed a lease for approximately 14,380 square feet of office space in Toulouse, France, which expires February 24, 2018. As part of the Cameleon acquisition, the Company also assumed a lease for approximately 9,666 square feet of office space in Skokie, Illinois, which expires February 28, 2018 with an option to extend the term of the lease for an additional 5 years.
	The Company believes its existing facilities are sufficient for its current needs. The Company may add new facilities and expand its existing facilities as it adds employees, and it believes that suitable additional or substitute space will be available as needed to accommodate any such expansion of its operations.
	The Company had no capital leases at December 31, 2014 and 2013.

Segments

Segments	12 Months Ended
	Dec. 31, 2014
Revenues from External Customers and Long-Lived Assets [Line Items]
Segment Reporting Disclosure [Text Block]	Segment and geographic information
	Operating segments are the components of an enterprise about which separate financial information is available that is evaluated on a regular basis by the chief operating decision-maker (CODM) in deciding how to allocate resources to an individual segment and in assessing performance of the segment.  The Company’s CODM is its Chief Executive Officer (CEO), who reviews financial information presented on a consolidated basis for purposes of allocating resources and evaluating financial performance.  The Company sells its pricing and revenue management software to customers in multiple industries and geographies, but has no segment managers who are held accountable for operations, operating results or components below the consolidated unit level.  The company does not allocate costs at a level that would give segment managers the ability to meaningfully evaluate financial performance below the level presented to the CODM. Therefore, the Company believes that it operates in one segment and has a single reporting unit.
	Revenue by Geography
	The Company presents financial information on a consolidated basis and does not assess the profitability of its geographic regions. Accordingly the Company does not attempt to comprehensively assign or allocate costs to these regions and does not produce reports for, or measure the performance of, its geographic regions based on any asset-based metrics.
	International revenue for the years ended December 31, 2014, 2013 and 2012, amounted to approximately $103.7 million, $79.8 million and $66.2 million, respectively, representing 56%, 55% and 56%, respectively, of annual revenue.
	The following geographic information is presented for the years ended December 31, 2014, 2013 and 2012. The Company categorizes geographic revenues based on the location of the customer’s headquarters.
		Year Ended December 31,
		2014				2013				2012
		Revenue		Percent		Revenue		Percent		Revenue		Percent
	The Americas:
	United States of America	$	82,086	44	%	$	65,072	45	%	$	51,631	44	%
	Other	15,365		8	%	12,222		8	%	5,457		5	%
	Subtotal	97,451		52	%	77,294		54	%	57,088		49	%
	Europe	45,987		25	%	33,666		23	%	31,545		27	%
	Asia Pacific	34,170		18	%	22,411		15	%	15,356		13	%
	The Middle East	6,239		3	%	9,840		7	%	10,914		9	%
	Africa	1,982		1	%	1,626		1	%	2,888		2	%
	Total revenue	$	185,829	100	%	$	144,837	100	%	$	117,791	100	%

Concentrations_of_Risk

Concentrations of Risk	12 Months Ended
	Dec. 31, 2014
Risks and Uncertainties [Abstract]
Concentration Risk Disclosure [Text Block]	Concentrations of credit risk
	For the years ended December 31, 2014, 2013 and 2012, no customer accounted for 10% or more of revenue. For the year ended December 31, 2014, one customer accounted for 10.7% of accounts receivables, net and unbilled.
	The Company’s cash and cash equivalents and short-term investments on deposit with any one party and at any point in time may exceed federally insured limits. To date, the Company has not incurred any losses in connection with short-term investments.

Related_Party_Transaction

Related Party Transaction	12 Months Ended
	Dec. 31, 2014
Related Party Transactions [Abstract]
Related Party Transactions Disclosure [Text Block]	Related-party transactions
	The Company currently has employment agreements with its executive officers. The employment agreements provide for six months to one and one half years of salary upon termination without cause or, in some cases, for good reason and the vesting of certain stock options or other equity awards.

Employment_Retirement_Savings

Employment Retirement Savings	12 Months Ended
	Dec. 31, 2014
Compensation and Retirement Disclosure [Abstract]
Defined Benefit Plan Disclosure [Line Items]	Employee retirement savings plan
	The Company sponsors a 401(k) savings plan ("401(k) Plan"). The 401(k) Plan is available to substantially all United States employees and is designed to provide eligible employees with an opportunity to make regular contributions to a long-term investment and savings program. Historically, the Company’s matching contribution is defined as 50% of the first 6% of employee contributions. The Company may also make discretionary contributions. Matching contributions by the Company in 2014, 2013 and 2012 totaled approximately $1.4 million, $1.1 million and $1.0 million, respectively.

Quarterly_Results

Quarterly Results	12 Months Ended
	Dec. 31, 2014
Quarterly Financial Information Disclosure [Abstract]
Quarterly Financial Information [Text Block]	Quarterly results (Unaudited)
	The following table presents certain unaudited quarterly financial data for the years ended December 31, 2014 and 2013. This information has been prepared on the same basis as the accompanying Consolidated Financial Statements and all necessary adjustments have been included in the amounts below to state fairly the selected quarterly information when read in conjunction with the accompanying Consolidated Financial Statements and Notes thereto.
		Quarter Ended
		December 31,			September 30,			June 30,			March 31,
		2014			2014			2014			2014
	Total revenue	$	53,829		$	46,719		$	44,368		$	40,913
	Gross profit	$	39,319		$	32,442		$	29,615		$	26,367
	Loss from operations	$	(2,316	)	$	(3,720	)	$	(7,871	)	$	(8,500	)
	Net loss attributable to PROS Holdings, Inc.	$	(17,459	)	$	(3,734	)	$	(6,996	)	$	(8,455	)
	Net loss attributable to common stockholders per share:
	Basic	$	(0.60	)	$	(0.13	)	$	(0.24	)	$	(0.29	)
	Diluted	$	(0.60	)	$	(0.13	)	$	(0.24	)	$	(0.29	)
		Quarter Ended
		December 31,			September 30,			June 30,			March 31,
		2013			2013			2013			2013
	Total revenue	$	38,871		$	36,813		$	35,527		$	33,626
	Gross profit	$	28,101		$	25,787		$	24,741		$	23,073
	Income from operations	$	409		$	1,395		$	780		$	689
	Net income attributable to PROS Holdings, Inc.	$	139		$	993		$	580		$	1,734
	Net earnings attributable to common stockholders per share:
	Basic	$	—		$	0.04		$	0.02		$	0.06
	Diluted	$	—		$	0.03		$	0.02		$	0.06
	In connection with the preparation of the Company’s financial statements for the year ended December 31, 2014, the Company revised the classification of the amortization expense of developed technology arising from the acquisitions of Cameleon and Signal Demand. The amortization expense was previously recorded within research and development expenses as a component of operating expenses and was reclassified as a component of cost of revenue.  Accordingly, the Consolidated Statements of Comprehensive Income were adjusted for the periods ended March 31, 2014, June 30, 2014, and September 30, 2014 to increase cost of revenue and reduce gross profit by $0.5 million, $0.6 million and $0.6 million, respectively.  Research and development expenses were reduced by the same adjustments resulting in no change to reported net income attributable to PROS Holdings, Inc. or basic or diluted net earnings attributable to common stockholders per share.
	These revisions were not deemed material, individually or in aggregate, to the Consolidated Statements of Comprehensive Income for the corresponding prior periods. These revisions do not impact the Company’s previously reported Consolidated Balance Sheets or Statements of Cash Flows.

Schedule_II_Valuation_and_Qual

Schedule II - Valuation and Qualifying Accounts	12 Months Ended
	Dec. 31, 2014
Valuation and Qualifying Accounts [Abstract]
Schedule of Valuation and Qualifying Accounts Disclosure [Text Block]	Schedule II
	Valuation and Qualifying Accounts
		Balance at		Additions		Deductions (1)			Other (2)		Balance at
		beginning		charged to							end of
		of period		costs and							period
				expenses
	Allowance for doubtful accounts
	2014	$	1,060	$	8	$	(200	)	$	—	$	868
	2013	$	760	$	369	$	(69	)	$	—	$	1,060
	2012	$	1,130	$	—	$	(370	)	$	—	$	760
	Valuation allowance
	2014	$	1,357	$	19,506	$	—		$	8,009	$	28,872
	2013	$	—	$	509	$	—		$	848	$	1,357
	2012	$	—	$	—	$	—		$	—	$	—
	(1) Deductions column represents the reversal of additions previously charged to costs and expenses and uncollectible accounts written off, net of recoveries.
	(2) Additions represent valuation allowance adjustments recorded as part of the purchase accounting allocation related to the SignalDemand and Cameleon acquisitions.

Summary_of_Significant_Account1

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2014
Accounting Policies [Abstract]
Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block]	Principles of consolidation and basis of presentation
	The Consolidated Financial Statements include the accounts of the Company, and its wholly-owned subsidiaries. All significant intercompany transactions and balances have been eliminated in consolidation. The Consolidated Financial Statements of the Company have been prepared in accordance with generally accepted accounting principles in the United States ("GAAP").
Dollar amounts	Dollar amounts
	The dollar amounts presented in the tabular data within these footnote disclosures are stated in thousands of dollars, except per share amounts, or as noted within the context of each footnote disclosure.
Use of estimates	Use of estimates
	The Company’s management makes estimates and assumptions in the preparation of its audited Consolidated Financial Statements in conformity with GAAP. These estimates and assumptions may affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the audited Consolidated Financial Statements and the reported amounts of revenue and expense during the reporting periods. Actual results could differ from those estimates. The complexity of the estimation process and issues related to the assumptions, risks and uncertainties inherent in the application of the percentage-of-completion method of revenue recognition affects the amount of revenue, expenses, unbilled receivables and deferred revenue. Numerous internal and external factors can affect estimates. Estimates are also used for, but not limited to, receivables, allowance for doubtful accounts, useful lives of assets, depreciation and amortization, the fair value of assets acquired and liabilities assumed for business combinations, income taxes and deferred tax asset valuation, valuation of stock options, other current liabilities and accrued liabilities.
Cash and Cash Equivalents, Policy [Policy Text Block]	Cash and cash equivalents
	The Company considers all highly liquid investments with an original maturity of three months or less at the time of purchase, or have the ability to be settled in cash within a period of three months, to be cash equivalents. The Company has a cash management program that provides for the investment of excess cash balances, primarily in short-term money market instruments.
Fair Value of Financial Instruments, Policy [Policy Text Block]	Financial instruments
	The carrying amount of the Company’s financial instruments, which include cash equivalents, short-term investments, receivables and accounts payable, approximates their fair values at December 31, 2014 and 2013. For additional information on the Company’s fair value measurements, see Note 9 to the Consolidated Financial Statements.
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Table Text Block]	Prepaid expenses and other assets
	Prepaid expenses and other assets consist primarily of short-term deferred tax assets, prepaid income taxes, deferred project costs and prepaid third-party license fees.
Property, Plant and Equipment, Policy [Policy Text Block]	Property and equipment, net
	Property and equipment are recorded at cost, less accumulated depreciation. Maintenance, repairs and minor replacements are charged to expense as incurred. Significant renewals and betterments are capitalized. Depreciation on property and equipment, with the exception of leasehold improvements, is recorded using the straight-line method over the estimated useful lives of the assets. Depreciation on leasehold improvements is recorded using the shorter of the lease term or useful life. When property is retired or disposed of, the cost and related accumulated depreciation are removed from the accounts and any resulting gains or losses are reflected in the Consolidated Statements of Comprehensive Income in the period of disposal.
Internal-use software	Internal-use software
	Costs incurred to develop internal-use software during the application development stage are capitalized, stated at cost, and depreciated using the straight-line method over the estimated useful lives of the assets. Application development stage costs generally include salaries and personnel costs and third-party contractor expenses associated with internal-use software development, configuration, coding and testing. Capitalized internal-use software is included in property and equipment, net in the Consolidated Balance Sheets.
Impairment or Disposal of Long-Lived Assets, Policy [Policy Text Block]	Impairment of long-lived assets
	Long-lived assets are reviewed for impairment whenever an event or change in circumstances indicates that the carrying amount of an asset or group of assets may not be recoverable. The impairment review includes comparison of future cash flows expected to be generated by the asset or group of assets with the associated assets’ carrying value. If the carrying value of the asset or group of assets exceeds its expected future cash flows (undiscounted and without interest charges), an impairment loss is recognized to the extent that the carrying amount of the asset exceeds its fair value. During the year ended December 31, 2014, the Company recorded a full impairment of $4.0 million related to capitalized internal-use software associated with the expected future cash flows. The Company did not record any impairment charges in any of the years ended December 31, 2013 and 2012.
Goodwill and Intangible Assets, Goodwill, Policy [Policy Text Block]	Intangible assets and goodwill
	Intangible assets that have finite lives are amortized over their useful lives and are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable. During this review, the Company reevaluates the significant assumptions used in determining the original cost and estimated lives of long-lived assets. Although the assumptions may vary from asset to asset, they generally include operating results, changes in the use of the asset, cash flows and other indicators of value. Management then determines whether the remaining useful life continues to be appropriate or whether there has been an impairment of long-lived assets based primarily upon whether expected future undiscounted cash flows are sufficient to support the assets’ recovery. If impairment exists, the Company would adjust the carrying value of the asset to fair value, generally determined by a discounted cash flow analysis.
	Goodwill represents the excess of the purchase consideration over the net of the acquisition-date fair value of identifiable assets acquired, including identifiable intangible assets, and liabilities assumed in connection with business combinations. Goodwill is not amortized, but is evaluated for impairment annually, or whenever events or changes in circumstances indicate that the carrying value may not be recoverable.
	Goodwill is assessed for impairment as of November 30 of each fiscal year, or more frequently if events or changes in circumstances indicate that the fair value of the Company’s reporting unit has been reduced below its carrying value. When conducting the annual goodwill impairment assessment, a three step process is used. The first step is to perform an optional qualitative evaluation as to whether it is more likely than not that the fair value of the Company’s reporting unit is less than its carrying value, using an assessment of relevant events and circumstances. In performing this assessment, the Company is required to make assumptions and judgments including but not limited to an evaluation of macroeconomic conditions as they relate to the business, industry and market trends, as well as the overall future financial performance of the reporting unit and future opportunities in the markets in which it operates. If it is determined that it is not more likely than not that the fair value of the reporting unit is less than its carrying value, no additional tests are required to be performed in assessing goodwill for impairment. However, if the Company concludes otherwise or elects not to perform the qualitative assessment, the Company performs a second step, consisting of a quantitative assessment of goodwill impairment. This quantitative assessment requires us to estimate the fair value of the reporting unit and compare the estimated fair value to its respective carrying value (including goodwill) as of the date of the impairment test. The third step, employed for the reporting unit failing the second step, is used to measure the amount of any potential impairment and compares the implied fair value of the reporting unit with the carrying amount of goodwill. Based on the results of the qualitative review of goodwill performed as of November 30, 2014, the Company did not identify any indicators of impairment. As such, the second and third steps described above were not necessary.
Research and Development Expense, Policy [Policy Text Block]	Research and development
	Research and development costs for software sold to customers is expensed as incurred. These costs include salaries and personnel costs, including employee benefits, third-party contractor expenses, software development tools, an allocation of facilities and depreciation expenses and other expenses in developing new solutions and upgrading and enhancing existing solutions.
Treasury Stock [Text Block]	Treasury stock
	The Company is authorized to make treasury stock purchases in the open market pursuant to the share repurchase program, which was approved by its Board of Directors on August 28, 2008. The Company accounts for the purchase of treasury stock under the cost method. For additional information on the Company’s stock repurchase program, see Note 10 to the Consolidated Financial Statements. There were no treasury stock repurchases for the years ended December 31, 2014, 2013 and 2012.
Revenue recognition	Revenue recognition
	The Company derives its revenue from the licensing and implementation of software solutions and associated software maintenance and support. To a lesser extent, the Company’s revenue includes nonsoftware related hosting services. The Company’s arrangements with customers typically include: (a) license fees paid for the use of software solutions either in perpetuity or over a specified term and implementation fees for configuration, implementation and training services and (b) maintenance and support fees related to technical support and software updates. If there is significant uncertainty about contract completion or collectability is not reasonably assured, revenue is deferred until the uncertainty is sufficiently resolved or collectability is reasonably assured. In addition, revenue is recognized when persuasive evidence of an arrangement exists, delivery has occurred and fees are fixed or determinable.
	In determining whether professional services revenue should be accounted for separately from license revenue, the Company evaluates whether the professional services are considered essential to the functionality of the software using factors such as: the nature of its software products; whether they are ready for use by the customer upon receipt; the nature of professional services; the availability of services from other vendors; whether the timing of payments for license revenue coincides with performance of services; and whether milestones or acceptance criteria exist that affect the realizability of the software license fee.
	If the Company determines that professional services revenue should not be accounted for separately from license revenue, the license revenue is recognized together with the professional services revenue using the percentage-of-completion method or completed contract method. The completed contract method is also used for contracts where there is a risk over final acceptance by the customer or for contracts that are short-term in nature.
	The percentage-of-completion method is measured by the percentage of man-days incurred during the reporting period as compared to the estimated total man-days necessary for each contract for implementation of the software solutions. The Company measures performance under the percentage-of-completion method using total man-day method based on current estimates of man-days to complete the project. The Company believes that for each such project, man-days expended in proportion to total estimated man-days at completion represents the most reliable and meaningful measure for determining a project’s progress toward completion. Under our fixed-fee arrangements, should a loss be anticipated on a contract, the full amount is recorded when the loss is determinable.
	The Company also licenses software solutions under term license agreements that typically include maintenance during the license term. When maintenance is included for the entire term of the license, there is no renewal rate and the Company has not established vendor specific objective evidence ("VSOE") of fair value for the maintenance on term licenses. For term license agreements, revenue and the associated costs are deferred until the delivery of the solution and recognized ratably over the remaining license term. Revenue from term licenses represented approximately 2.9%, 3.6% and 4.8% of total revenue for the years ended December 31, 2014, 2013 and 2012, respectively.
	For arrangements that include cloud-based services, the Company allocates the arrangement consideration between the service and other elements and recognize the cloud-based services fee ratably beginning on the date the customer commences use of those services and continues through the end of the service term.
	The Company’s customer arrangements typically contain multiple elements that include software license, professional services and post-implementation maintenance and support. For multiple element arrangements containing our nonsoftware services, the Company must (1) determine whether and when each element has been delivered; (2) determine fair value of each element using the selling price hierarchy of VSOE of fair value, third party evidence ("TPE"), or BESP, as applicable, and (3) allocate the total price among the various elements based on the relative selling price method.
	For multiple-element arrangements that contain software and nonsoftware elements such as the Company's hosting service offerings, the Company allocates revenue between the software and software related elements as a group and any nonsoftware elements based on a relative fair value allocation.  The Company determines fair value for each deliverable using this hierarchy and utilize VSOE of fair value if it exists.
	In certain instances, the Company may not be able to establish VSOE for all deliverables in an arrangement with multiple elements. This may be due to infrequently selling each element separately, not pricing solutions or services within a narrow range, or only having a limited sales history. In addition, third party evidence may not be available. When the Company is unable to establish selling prices using VSOE or TPE, it uses BESP in the allocation of arrangement consideration. The objective of BESP is to determine the price at which the Company would transact a sale if the product or service were sold on a stand-alone basis. For transactions that only include software and software-related elements, the Company continues to account for such arrangements under the software revenue recognition standards which require it to establish VSOE of fair value to allocate arrangement consideration to multiple deliverables.
	Maintenance and support revenue includes post-implementation customer support and the right to unspecified software updates and enhancements on a when and if available basis. The Company recognizes revenue from maintenance arrangements ratably over the period in which the services are provided.
	Revenue that has been recognized, but for which the Company has not invoiced the customer, is recorded as unbilled receivables. Invoices that have been issued before revenue has been recognized are recorded as deferred revenue in the accompanying consolidated balance sheets.
Foreign Currency Transactions and Translations Policy [Policy Text Block]	Foreign currency
	The Company has contracts denominated in foreign currencies and therefore a portion of the Company’s revenue is subject to foreign currency risks. Gains and losses from foreign currency transactions, such as those resulting from the settlement of receivables, are classified in other expense, net included in the accompanying Consolidated Statements of Comprehensive Income.
	The functional currency of Cameleon is its local currency. The financial statements of this subsidiary are translated into U.S. dollars using period-end rates of exchange for assets and liabilities, historical rates of exchange for equity, and average rates of exchange for the period for revenue and expenses. Translation gains (losses) are recorded in accumulated other comprehensive income (loss) as a component of stockholders’ equity.
Noncash share-based compensation	Noncash share based compensation
	The Company has two noncash share based compensation plans, the 1999 Equity Incentive Plan ("1999 Stock Plan") and the 2007 Equity Incentive Plan ("2007 Stock Plan"), which authorize the discretionary granting of various types of stock awards to key employees, officers, directors and consultants. The 1999 Stock Plan was terminated in March 2007 for purposes of granting any future equity awards. The 2007 Stock Plan was adopted in March 2007. The Company may provide noncash share based compensation through the grant of: (i) restricted stock awards; (ii) restricted stock unit awards; (iii) stock options; (iv) stock appreciation rights; (v) phantom stock; and (vii) performance awards. Also in February 2014, the Company granted inducement awards in an aggregate amount of up to 308,250 shares in accordance with NYSE Rule 303A.08. These inducement awards were in the form of RSUs and MSUs granted to our recently appointed Chief Operating Officer and RSUs granted to certain new employees in connection with our acquisitions of Cameleon and SignalDemand.
	To date, the Company has granted stock options, stock appreciation rights, restricted stock units, time based and performance based, and market stock units. The Company issues common stock from its pool of authorized stock upon exercise of stock options, settlement of stock appreciation rights and market stock units or upon vesting of restricted stock units. The following table presents the number of awards outstanding for each award type as of December 31, 2014 and 2013:
		Year Ended December 31,
	Award type	2014	2013
	Stock options	961	1,160
	Restricted stock units (time based)	1,830	1,543
	Restricted stock units (performance based)	34	—
	Stock appreciation rights	673	721
	Market stock units	444	469
	Stock options. The Company did not grant stock options during 2014 and 2013. The fair value of each stock option was estimated on the date of grant using the Black-Scholes option pricing model.
	Restricted stock units. The fair value of the restricted stock units ("RSUs") is based on the closing price of the Company’s stock on the date of grant and is amortized over the vesting period.
	Stock appreciation rights. Stock appreciation rights ("SARs") will be settled in stock at the time of exercise and vest over four years from the date grant. The Company used the Black-Scholes option pricing model to estimate the fair value of its SARs. The determination of the fair value of SARs utilizing the Black-Scholes model is affected by the Company’s stock price and a number of assumptions, including expected volatility, expected life, deliver risk-free interest rate and expected dividends. The Company estimates the expected volatility of common stock at the date of grant based on a combination of its historical volatility and the average volatility of comparable companies. The expected life of the SARs noncash share based payment awards is a historical weighted average of the expected lives of similar securities of comparable public companies. The risk-free interest rate assumption is based on observed interest rates appropriate for the terms of the Company’s awards. The dividend yield assumption is based on our expectation of paying no dividends.
	Market stock units. The market stock units ("MSUs") are performance-based awards that vest based upon the Company’s relative shareholder return. The actual number of MSUs that will be eligible to vest is based on the total shareholder return of the Company relative to the total shareholder return of the Russell 2000 Index ("Index") over a three year period ending December 31, 2015, December 31, 2016 and June 30, 2017 ("Performance Period"), respectively. The MSUs granted in 2013 vest on January 1, 2016, and the MSUs granted in 2014 vest on January 1, 2017 and July 1, 2017, respectively. The maximum number of shares issuable upon vesting is 200% of the MSUs initially granted based on the average price of our common stock relative to the Index during the Performance Period. The Company estimates the fair value of MSUs on the date of grant using a Monte Carlo simulation model. The determination of fair value of the MSUs is affected by the Company’s stock price and a number of assumptions including the expected volatility of the Company’s stock and the Index, its risk-free interest rate and expected dividends. The Company’s expected volatility at the date of grant was based on the historical volatilities of the Company and the Index over the Performance Period.
	As the Company issues stock options and SARs, it evaluates the assumptions used to value our stock option awards and SARs. If factors change and the Company employs different assumptions, noncash share based compensation expense may differ significantly from what has been recorded in the past. If there are any modifications or cancellations of the underlying unvested securities, the Company may be required to accelerate, increase or cancel any remaining unearned noncash share based compensation expense. Future noncash share based compensation expense and unearned noncash share based compensation will increase to the extent that the Company grants additional equity awards to employees.
	At December 31, 2014, there were an estimated $45.6 million of total unrecognized compensation costs related to noncash share based compensation arrangements. These costs will be recognized over a weighted average period of 2.4 years. For further discussion of the Company’s noncash share based compensation plans, see Note 11 to the Consolidated Financial Statements.
Standard Product Warranty, Policy [Policy Text Block]	Product warranties
	The Company generally issues warranties for 90 days following the first use of the software in a production environment, depending on the contract, for software licenses and implementation services. In the Company’s experience, warranty costs have been insignificant.
Income taxes	Income taxes
	The Company uses the asset and liability method to account for income taxes, including recognition of deferred tax assets and liabilities for the anticipated future tax consequences attributable to differences between financial statement amounts and their respective tax basis. The Company reviews its deferred tax assets for recovery. A valuation allowance is established when the Company believes that it is more-likely than not that some portion of its deferred tax assets will not be realized. Changes in the valuation allowance from period to period are included in the Company’s tax provision in the period of change.
	The Company accounts for uncertain income tax positions recognized in an enterprise’s financial statements in accordance with the income tax topic of the ASC issued by the FASB. This interpretation requires companies to use a prescribed model for assessing the financial recognition and measurement of all tax positions taken or expected to be taken in its tax returns. This guidance provides clarification on recognition, classification, interest and penalties, accounting in interim periods, disclosures and transition. The Company recognized accrued interest and penalties related to income taxes as a component of income tax expense. For additional information regarding the Company’s income taxes, see Note 12 to the Consolidated Financial Statements.
Earnings per share	Earnings per share
	The Company computes basic earnings (loss) per share by dividing net income (loss) attributable to common stockholders by the weighted average number of common shares outstanding. Diluted earnings (loss) per share is computed by dividing net income (loss) attributable to common stockholders by the weighted average number of common shares and dilutive potential common shares then outstanding. Diluted earnings per share reflect the assumed conversion of all dilutive securities, using the treasury stock method. Dilutive potential common shares consist of shares issuable upon the exercise of stock options, shares of unvested restricted stock units, and settlement of stock appreciation rights. When the Company incurs a net loss, the effect of the Company’s outstanding stock options, stock appreciation rights and restricted stock units are not included in the calculation of diluted earnings (loss) per share as the effect would be anti-dilutive. Accordingly, basic and diluted net loss per share are identical.
Recent accounting pronouncements	Recent accounting pronouncements
	In May 2014, the FASB issued Accounting Standards Update (ASU) 2014-09, "Revenue from Contracts with Customers (Topic 606)," which supersedes nearly all existing revenue recognition guidance under GAAP. The new guidance will be effective for fiscal 2017, including interim periods within that reporting period, using one of two prescribed retrospective methods. No early adoption is permitted. The Company is currently in the process of evaluating the impact of the adoption of ASU 2014-09 on their consolidated financial statements and related disclosures.

Summary_of_Significant_Account2

Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2014
Accounting Policies [Abstract]
Disclosure of Share-based Compensation Arrangements by Share-based Payment Award [Table Text Block]	The following table presents the number of awards outstanding for each award type as of December 31, 2014 and 2013:
		Year Ended December 31,
	Award type	2014	2013
	Stock options	961	1,160
	Restricted stock units (time based)	1,830	1,543
	Restricted stock units (performance based)	34	—
	Stock appreciation rights	673	721
	Market stock units	444	469

Business_Combination_Tables

Business Combination (Tables)	12 Months Ended
	Dec. 31, 2014
Business Acquisition [Line Items]
Business Acquisition, Pro Forma Information [Table Text Block]	The unaudited financial information in the table below summarizes the combined results of operations of the Company, Cameleon and SignalDemand, on a pro forma basis, as though the Company had acquired Cameleon and SignalDemand on January 1, 2013. In addition, the unaudited financial information in the table below includes the effect of SignalDemand as if it had occurred as of January 1, 2012. The pro forma information for all periods presented also includes the effect of business combination accounting resulting from the acquisition, including amortization charges from acquired intangible assets.
		Year Ended December 31,
	(in thousands)	2014			2013			2012
	Total revenue	$	186,081		$	168,974		$	120,345
	Net loss attributable to PROS Holdings, Inc.	(36,776		)	(3,647		)	(3,252		)
	Earnings per share - basic and diluted	$	(1.27	)	$	(0.13	)	$	(0.12	)
Schedule of Purchase Price Allocation [Table Text Block]
	Current assets	$	881
	Deferred tax asset - current	2,752
	Noncurrent assets	193
	Intangibles	8,300
	Goodwill	7,175
	Deferred tax asset - noncurrent	2,447
	Accounts payable and accrued liabilities	(1,560		)
	Deferred revenue	(6,688		)
		$	13,500
Schedule of Finite-Lived Intangible Assets Acquired as Part of Business Combination [Table Text Block]	The following are the identifiable intangible assets acquired and their respective useful lives:
					Useful Life
		Amount			(years)
	Developed technology	$	4,600		7
	Internally developed technology	160			2
	Customer relationships	3,500			8
	Trade name	40			2
	Total	$	8,300

Noncontrolling_interest_Tables

Noncontrolling interest (Tables)	12 Months Ended
	Dec. 31, 2014
Noncontrolling Interest [Abstract]
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Table Text Block]	The following table presents a rollforward of the non-controlling interest from the date of acquisition of Cameleon on January 8, 2014 through December 31, 2014 (in thousands):
	Beginning balance as of January 8, 2014	$	6,204
	Change in Parent's ownership in the subsidiary, net of cumulative earnings previously allocated to NCI and re-allocated to Parent's equity	(5,282		)
	Net loss allocated to non-controlling interest	(907		)
	Foreign currency translation adjustment	(15		)
	Ending balance as of December 31, 2014	$	—

Goodwill_and_Intangible_Assets1

Goodwill and Intangible Assets (Tables)	12 Months Ended
	Dec. 31, 2014
Goodwill [Line Items]
Schedule of Goodwill [Table Text Block]	The change in the carrying amount of goodwill for the years ended December 31, 2014 and 2013, was as follows (in thousands):
	Balance as of December 31, 2012	$	—
	Goodwill acquired	7,024
	Balance as of December 31, 2013	7,024
	Goodwill acquired	15,717
	Purchase accounting adjustments	151
	Foreign currency translation adjustments	(1,329		)
	Balance as of December 31, 2014	$	21,563
Schedule of Finite-Lived Intangible Assets [Table Text Block]	Intangible assets consisted of the following as of December 31, (in thousands):
				31-Dec-13
		Weighted average useful life (years)		Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount
	Developed technology	7		$	4,600	$	27	$	4,573
	Internally developed technology	2		160		3		157
	Customer relationships	8		3,500		37		3,463
	Trade name	2		40		1		39
	Total			$	8,300	$	68	$	8,232
				31-Dec-14
		Weighted average useful life (years)		Gross Carrying Amount		Accumulated Amortization*		Net Carrying Amount
	Developed technology	7		$	14,567	$	2,082	$	12,485
	Internally developed technology and other	2		1,254		620		634
	Maintenance Relationship	8		3,591		788		2,803
	Customer relationships	7		4,853		1,399		3,454
	Trade name	8		952		133		819
	Total			$	25,217	$	5,022	$	20,195
	*Cumulative foreign currency translation adjustments, reflecting movement in the currencies of the underlying entities, decreased total intangible assets by approximately $1.5 million as of December 31, 2014.
	Customer relationships are amortized over a period ranging from two to eight years. Trade names are amortized over a period ranging from two to eight years.
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]	As of December 31, 2014, the expected future amortization expense for the acquired intangible assets for each of the five succeeding years and thereafter was as follows (in thousands):
	Year Ending December 31,		Amount
	2015		$	4,429
	2016		3,254
	2017		3,000
	2018		3,000
	2019		2,873
	Thereafter		3,639
	Total amortization expense		$	20,195

Accounts_Receivable_and_Contra1

Accounts Receivable and Contracts in Progress (Tables)	12 Months Ended
	Dec. 31, 2014
Accounts Receivable [Abstract]
Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]	Accounts receivable at December 31, 2014 and 2013, consists of the following:
		December 31,
		2014			2013
	Accounts receivable	$	64,004		$	40,842
	Unbilled receivables	7,959			6,784
	Total receivables	71,963			47,626
	Less: Allowance for doubtful accounts	(868		)	(1,060		)
	Accounts receivable, net	$	71,095		$	46,566
Schedule Of Contracts In Progress [Table Text Block]	Activity related to contracts in progress at December 31, 2014 and 2013, is summarized as follows:
		December 31,
		2014			2013
	Costs and estimated earnings recognized to date	$	349,874		$	221,905
	Progress billings to date	(400,349		)	(260,372		)
	Total	$	(50,475	)	$	(38,467	)
Schedule Of Unbilled Receivables And Deferred Revenue [Table Text Block]	These amounts are included in the accompanying Consolidated Balance Sheets at December 31, 2014 and 2013, as follows:
		December 31,
		2014			2013
	Unbilled receivables	$	7,959		$	6,784
	Deferred revenue	(58,434		)	(45,251		)
	Total	$	(50,475	)	$	(38,467	)

Earnings_per_Share_Table

Earnings per Share (Table)	12 Months Ended
	Dec. 31, 2014
Earnings Per Share [Abstract]
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]	The following table sets forth the computation of basic and diluted earnings per share:
		For the Year Ended December 31,
		2014			2013		2012
	Numerator:
	Net (loss) income attributable to PROS Holdings, Inc.	$	(36,644	)	$	3,446	$	4,966
	Denominator:
	Weighted average shares (basic)	28,915			28,004		27,366
	Dilutive effect of stock options, restricted stock units and stock appreciation rights	—			2,110		1,054
	Weighted average shares (diluted)	28,915			30,114		28,420
	Basic earnings per share	$	(1.27	)	$	0.12	$	0.18
	Diluted earnings per share	$	(1.27	)	$	0.11	$	0.17

Property_and_Equipment_net_Tab

Property and Equipment, net (Tables)	12 Months Ended
	Dec. 31, 2014
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment [Table Text Block]	Property and equipment, net as of December 31, 2014 and 2013 consists of the following:
			December 31,
		Estimated useful life	2014			2013
	Furniture and fixtures	7-10 years	$	2,874		$	2,423
	Computers and equipment	3-5 years	15,662			10,857
	Software	2-6 years	5,068			4,322
	Capitalized internal-use software development costs	3 years	2,639			5,064
	Leasehold improvements	Shorter of lease term	5,625			4,568
		or useful life
	Construction in progress		5			305
	Property and equipment, gross		31,873			27,539
	Less: Accumulated depreciation and amortization		(16,085		)	(11,952		)
	Property and equipment, net		$	15,788		$	15,587

Noncash_Sharebased_Compensatio1

Noncash Share-based Compensation (Tables)	12 Months Ended
	Dec. 31, 2014
Noncash Share-based Compensation [Abstract]
Schedule of Share-based Compensation Expense	Noncash share based compensation expense is allocated to expense categories on the Consolidated Statements of Comprehensive Income. The following table summarizes noncash share based compensation expense, net of amounts capitalized, for the years ended December 31, 2014, 2013 and 2012.
		For the Year Ended December 31,
		2014			2013			2012
	Share-based compensation:
	Cost of revenue	$	3,469		$	2,071		$	1,451
	Operating expenses:
	Selling and marketing	5,142			3,834			2,335
	General and administrative	9,375			7,055			3,938
	Research and development	4,679			3,139			1,921
	Total included in operating expenses	19,196			14,028			8,194
	Total share-based compensation expense	$	22,665		$	16,099		$	9,645
Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]	Stock Options:
	The following table summarizes the Company’s stock option activity for the year ended December 31, 2014:
		Number of		Weighted			Weighted		Aggregate
		shares		average			average		intrinsic
		under option		exercise price			remaining		value (1)
							contractual
							term (year)
	Outstanding, December 31, 2013	1,160		$	11.12
	Granted	—		—
	Exercised	-196		7.37
	Forfeited	—		—
	Expired	-3		14.93
	Outstanding, December 31, 2014	961		$	11.87		2.8		$	15,006
	Vested and exercisable at December 31, 2014	961		$	11.87		2.8		$	15,006
	(1) The aggregate intrinsic value was calculated based on the positive difference between the estimated fair value of the Company’s common stock on December 31, 2014 of $27.48 and the grant date fair value.
Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block]	The following table summarizes the Company's unvested RSUs as of December 31, 2014, and changes during the year then ended, is as follows:
		Number of		Weighted			Weighted		Aggregate
		shares		average			average		intrinsic value
				grant date			remaining		-1
				fair value			contractual
							term (year)
	Unvested at December 31, 2013	1,543		$	18.25
	Granted	1,028		33.46
	Vested	(582	)	17.42
	Forfeited	(125	)	25.28
	Unvested at December 31, 2014	1,864		$	26.67		4.65		$	51,231
	Expected to vest at December 31, 2014	1,822		$	26.6		4.64		$	50,067
	(1) The aggregate intrinsic value was calculated based on the fair value of the Company’s common stock on December 31, 2014 of $27.48.
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value [Table Text Block]	The following table summarizes the Company's SARs activity for the year ended December 31, 2014:
		Stock		Weighted			Weighted		Aggregate
		appreciation		average			average		intrinsic value
		rights		exercise price			remaining		-1
							contractual
							term (year)
	Outstanding, December 31, 2013	721		$	10.74
	Granted	—		—
	Exercised	(48	)	10.59
	Forfeited	—		—
	Expired	—		—
	Outstanding, December 31, 2014	673		$	10.75		5.82		$	11,260
	Exercisable at December 31, 2014	662		$	10.74		5.81		$	11,083
	Vested and expected to vest at December 31, 2014	673		$	10.75		5.82		$	11,260
	(1) The aggregate intrinsic value was calculated based on the positive difference between the estimated fair value of the Company’s common stock on December 31, 2014 of $27.48 and the exercise price of the underlying SARs.
Schedule of Assumptions Used [Table Text Block]	Significant assumptions used in the Monte Carlo simulation model for MSUs granted during December 31, 2014, 2013 and 2012 are as follows:
		For the Year Ended December 31,
		2014	2013	2012
	Volatility	50.86%	57%	61%
	Risk-free interest rate	0.68%	0.35%	0.28%
	Expected option life in years	2.88	2.84	1.9
	Dividend yield	—	—	—
	The assumptions related to fiscal year 2014 are presented on weighted average basis for the various awards granted throughout the period.
	Employee stock purchase plan:
	In June 2013, the Board of Directors authorized an Employee Stock Purchase Plan (“ESPP”) which provides for eligible employees to purchase shares on an after-tax basis in an amount between 1% and 10% of their annual pay: (i) on June 30 of each year at a 5% discount of the fair market value of our common stock on January 1 or June 30, whichever is lower, and (ii) on December 31 of each year at a 5% discount of the fair market value of our common stock on July 1 or December 31, whichever is lower. An employee may not purchase more than $5,000 in either of the six-month measurement periods described above or more than $10,000 annually. During the year ended December 31, 2014, the Company issued 13,392 shares under the ESPP. As of December 31, 2014, 486,608 shares remain authorized and available for issuance under the ESPP. As of December 31, 2014, the Company held approximately $0.4 million on behalf of employees for future purchases under the ESPP and this amount was recorded in accrued liabilities in the Company's consolidated balance sheet.
Schedule of Nonvested Performance-based Units Activity [Table Text Block]
		Number of		Weighted			Weighted		Aggregate
		unvested awards		average			average		intrinsic
				grant date fair value			remaining		value (1)
							contractual
							term (year)
	Unvested at December 31, 2013	469		34.24
	Granted	198		$	48.54
	Exercised	(205	)	26.08
	Forfeited	(18	)	43.07
	Expired	—		—
	Unvested at December 31, 2014	444		$	44.03		6.3		$	12,209
	(1) The aggregate intrinsic value was calculated based on the positive difference between the estimated fair value of the Company’s common stock on December 31, 2014 of $27.48 and the grant date fair value of the underlying MSUs.
Market Stock Units Valuation Assumptions [Table Text Block]	Significant assumptions used in the Monte Carlo simulation model for MSUs granted during December 31, 2014, 2013 and 2012 are as follows:
		For the Year Ended December 31,
		2014	2013	2012
	Volatility	50.86%	57%	61%
	Risk-free interest rate	0.68%	0.35%	0.28%
	Expected option life in years	2.88	2.84	1.9
	Dividend yield	—	—	—
	The assumptions related to fiscal year 2014 are presented on weighted average basis for the various awards granted throughout the period.
	Employee stock purchase plan:
	In June 2013, the Board of Directors authorized an Employee Stock Purchase Plan (“ESPP”) which provides for eligible employees to purchase shares on an after-tax basis in an amount between 1% and 10% of their annual pay: (i) on June 30 of each year at a 5% discount of the fair market value of our common stock on January 1 or June 30, whichever is lower, and (ii) on December 31 of each year at a 5% discount of the fair market value of our common stock on July 1 or December 31, whichever is lower. An employee may not purchase more than $5,000 in either of the six-month measurement periods described above or more than $10,000 annually. During the year ended December 31, 2014, the Company issued 13,392 shares under the ESPP. As of December 31, 2014, 486,608 shares remain authorized and available for issuance under the ESPP. As of December 31, 2014, the Company held approximately $0.4 million on behalf of employees for future purchases under the ESPP and this amount was recorded in accrued liabilities in the Company's consolidated balance sheet.

Income_Tax_Disclosure_Tables

Income Tax Disclosure (Tables)	12 Months Ended
	Dec. 31, 2014
Schedule of income tax components [Abstract]
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]	The income tax provision (benefit) consisted of the following for the years ended December 31, 2014, 2013 and 2012:
		Year Ended December 31,
		2014			2013			2012
	Current:
	Federal	$	(935	)	$	2,444		$	2,015
	State and Foreign	790			160			74
		(145		)	2,604			2,089
	Deferred:
	Federal	12,334			(2,651		)	1,030
	State	304			(126		)	(68		)
	Income tax provision (benefit)	$	12,493		$	(173	)	$	3,051
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]	The differences between the effective tax rates reflected in the total provision for income taxes and the U.S. federal statutory rate of 34% for the years ended December 31, 2014, 2013 and 2012, respectively, were as follows:
		Year Ended December 31,
		2014			2013			2012
	Provision at the U.S. federal statutory rate	$	(8,520	)	$	1,113		$	2,726
	Increase (decrease) resulting from:
	State income taxes, net of federal taxes	49			(583		)	(84		)
	Nondeductible expenses	653			235			214
	Acquisition-related expense	434			606			—
	Purchase accounting - Statutory to GAAP income adjustment	990			—			—
	Foreign Tax Expense	837			135			111
	Domestic production activities	—			(47		)	(146		)
	Nondeductible noncash share based compensation	1,784			1,308			622
	Incremental benefits from prior years' tax credits	59			(1,254		)	(439		)
	Incremental benefits for tax credits	(3,259		)	(2,165		)	(111		)
	Change in tax rate/income subject to lower tax rates and other	(40		)	(30		)	158
	Change in valuation allowance	19,506			509			—
		$	12,493		$	(173	)	$	3,051
Schedule of Deferred Tax Assets and Liabilities [Table Text Block]	The tax effects of temporary differences that give rise to significant portions of the deferred tax assets and liabilities as of December 31, 2014 and 2013 are as follows:
		Year Ended December 31,
		2014			2013
	Current deferred tax assets:
	State deferred	$	185		$	(7	)
	Accruals not currently deductible	178			(191		)
	Current deferred revenue	1,664			2,601
	Total current deferred tax assets	2,027			2,403
	Less: valuation allowance	(1,953		)	(270		)
	Total current deferred tax assets	74			2,133
	Noncurrent deferred tax (liability) assets:
	Property and equipment	(2,186		)	(1,786		)
	Noncash share based compensation	9,095			7,808
	State deferred	217			292
	Capitalized software	(897		)	(1,541		)
	Amortization	(2,193		)	(2,366		)
	R&E tax credit carryforwards	4,316			2,708
	Deferred revenue	56			431
	Federal Net Operating Losses ("NOLs")	5,733			4,724
	State NOLs	537			813
	State Credits	1,240			509
	Foreign NOLs	10,111			—
	Foreign tax credit carryforward	837			—
	Other	(21		)	—
	Total noncurrent deferred tax assets	26,845			11,592
	Less: valuation allowance	(26,919		)	(1,087		)
	Total noncurrent deferred tax (liability) assets	(74		)	10,505
	Total net deferred tax assets	$	—		$	12,638
Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block]	The following table sets forth the changes to the Company's unrecognized tax benefit for the year ended December 31, 2014, 2013 and 2012:
			Year Ended December 31,
			2014			2013			2012
	Beginning Balance		$	349		$	349		$	349
	Changes based on tax positions related to prior year		46			—			—
	Ending Balance		$	395		$	349		$	349
	The table above has been updated to reflect gross tax liability, exclusive of interest and penalties and other offsetting amounts.

Convertible_debt_Tables

Convertible debt (Tables)	12 Months Ended
	Dec. 31, 2014
Debt Instrument [Line Items]
Convertible Debt [Table Text Block]	The Senior Notes consist of the following (in thousands):
		As of December 31, 2014
	Liability component:
	Principal	$	143,750
	Less: debt discount, net of amortization	(33,302		)
	Net carrying amount	$	110,448
	Equity component (1)	$	28,714
	(1) Recorded in the consolidated balance sheet within additional paid-in capital, net of $1.2 million issuance cost in equity.
	The following table sets forth total interest expense recognized related to the Senior Notes (in thousands):
		Year Ended December 31, 2014
	2.0% coupon	$	162
	Amortization of debt issuance costs	46
	Amortization of debt discount	283
	Total	$	491

Commitments_and_Contingencies_

Commitments and Contingencies (Tables)	12 Months Ended
	Dec. 31, 2014
Commitments and Contingencies Disclosure [Abstract]
Schedule of Future Minimum Lease Payments for Capital Leases [Table Text Block]	As of December 31, 2014, the future minimum lease commitments related to lease agreements were as follows:
	Year Ending December 31,	Amount
	2015	$	2,843
	2016	1,822
	2017	573
	2018	90
	2019 and thereafter	—
	Total minimum lease payments	$	5,328

Segments_Tables

Segments (Tables)	12 Months Ended
	Dec. 31, 2014
Schedule of Geographic Revenue [Abstract]
Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area [Table Text Block]	The following geographic information is presented for the years ended December 31, 2014, 2013 and 2012. The Company categorizes geographic revenues based on the location of the customer’s headquarters.
		Year Ended December 31,
		2014				2013				2012
		Revenue		Percent		Revenue		Percent		Revenue		Percent
	The Americas:
	United States of America	$	82,086	44	%	$	65,072	45	%	$	51,631	44	%
	Other	15,365		8	%	12,222		8	%	5,457		5	%
	Subtotal	97,451		52	%	77,294		54	%	57,088		49	%
	Europe	45,987		25	%	33,666		23	%	31,545		27	%
	Asia Pacific	34,170		18	%	22,411		15	%	15,356		13	%
	The Middle East	6,239		3	%	9,840		7	%	10,914		9	%
	Africa	1,982		1	%	1,626		1	%	2,888		2	%
	Total revenue	$	185,829	100	%	$	144,837	100	%	$	117,791	100	%

Quarterly_Results_Quarterly_Fi

Quarterly Results Quarterly Financial Information Disclosures (Tables)	12 Months Ended
	Dec. 31, 2014
Quarterly Financial Information Disclosure [Abstract]
Schedule of Quarterly Financial Information [Table Text Block]	The following table presents certain unaudited quarterly financial data for the years ended December 31, 2014 and 2013. This information has been prepared on the same basis as the accompanying Consolidated Financial Statements and all necessary adjustments have been included in the amounts below to state fairly the selected quarterly information when read in conjunction with the accompanying Consolidated Financial Statements and Notes thereto.
		Quarter Ended
		December 31,			September 30,			June 30,			March 31,
		2014			2014			2014			2014
	Total revenue	$	53,829		$	46,719		$	44,368		$	40,913
	Gross profit	$	39,319		$	32,442		$	29,615		$	26,367
	Loss from operations	$	(2,316	)	$	(3,720	)	$	(7,871	)	$	(8,500	)
	Net loss attributable to PROS Holdings, Inc.	$	(17,459	)	$	(3,734	)	$	(6,996	)	$	(8,455	)
	Net loss attributable to common stockholders per share:
	Basic	$	(0.60	)	$	(0.13	)	$	(0.24	)	$	(0.29	)
	Diluted	$	(0.60	)	$	(0.13	)	$	(0.24	)	$	(0.29	)
		Quarter Ended
		December 31,			September 30,			June 30,			March 31,
		2013			2013			2013			2013
	Total revenue	$	38,871		$	36,813		$	35,527		$	33,626
	Gross profit	$	28,101		$	25,787		$	24,741		$	23,073
	Income from operations	$	409		$	1,395		$	780		$	689
	Net income attributable to PROS Holdings, Inc.	$	139		$	993		$	580		$	1,734
	Net earnings attributable to common stockholders per share:
	Basic	$	—		$	0.04		$	0.02		$	0.06
	Diluted	$	—		$	0.03		$	0.02		$	0.06
	In connection with the preparation of the Company’s financial statements for the year ended December 31, 2014, the Company revised the classification of the amortization expense of developed technology arising from the acquisitions of Cameleon and Signal Demand. The amortization expense was previously recorded within research and development expenses as a component of operating expenses and was reclassified as a component of cost of revenue.  Accordingly, the Consolidated Statements of Comprehensive Income were adjusted for the periods ended March 31, 2014, June 30, 2014, and September 30, 2014 to increase cost of revenue and reduce gross profit by $0.5 million, $0.6 million and $0.6 million, respectively.  Research and development expenses were reduced by the same adjustments resulting in no change to reported net income attributable to PROS Holdings, Inc. or basic or diluted net earnings attributable to common stockholders per share.
	These revisions were not deemed material, individually or in aggregate, to the Consolidated Statements of Comprehensive Income for the corresponding prior periods. These revisions do not impact the Company’s previously reported Consolidated Balance Sheets or Statements of Cash Flows.

Summary_of_Significant_Account3

Summary of Significant Accounting Policies Significant Accounting Policies (Details) (USD $)	1 Months Ended	12 Months Ended
	Feb. 28, 2014	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Summary of Significant Accounting Policies [Line Items]
Inducement grants - Feb 2014	308,250
Tangible Asset Impairment Charges		$4,040,000	$0	$0
percentage of total revenue		100.00%	100.00%	100.00%
Total shareholder return period, in years, for vesting of MSUs		three
Shares issuable upon vesting of MSUs, maximum		200.00%
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized		$45,600,000
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition		2 years 5 months 0 days
Term License [Member]
Summary of Significant Accounting Policies [Line Items]
percentage of total revenue		2.90%	3.60%	4.80%

Summary_of_Significant_Account4

Summary of Significant Accounting Policies Awards Outstanding (Details)	Dec. 31, 2014	Dec. 31, 2013
Stock options
Awards outstanding [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number	961,377	1,160,000
Restricted Stock Units (RSUs) [Member]
Awards outstanding [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding, Number	1,830,291	1,543,000
Performance Shares [Member]
Awards outstanding [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding, Number	34,000	0
Stock Appreciation Rights (SARs) [Member]
Awards outstanding [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number	673,000
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding, Number	673,068	721,000
MSUs
Awards outstanding [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number	444,000	469,000
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding, Number	444,272	469,000

Business_Combination_Details

Business Combination (Details)

0 Months Ended

12 Months Ended

0 Months Ended

12 Months Ended

0 Months Ended

3 Months Ended

12 Months Ended

Jan. 08, 2014

Dec. 31, 2014

Dec. 31, 2014

Dec. 31, 2013

Dec. 31, 2012

Jan. 08, 2014

Dec. 31, 2014

Dec. 31, 2014

Dec. 16, 2013

Dec. 16, 2013

Dec. 31, 2013

Mar. 31, 2014

Dec. 31, 2014

Dec. 31, 2013

Dec. 16, 2013

Jan. 08, 2014

Jan. 08, 2014

EUR (€)

USD ($)

USD ($)

USD ($)

USD ($)

Cameleon Acquistion [Member]

Cameleon Acquistion [Member]

Cameleon Acquistion [Member]

Cameleon Acquistion [Member]

SignalDemand [Member]

SignalDemand [Member]

SignalDemand [Member]

SignalDemand [Member]

SignalDemand [Member]

SignalDemand [Member]

Premium on shares [Member]

Free shares [Member]

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

Business Acquisition [Line Items]

Business Acquisition, Percentage of Voting Interests Acquired

81.70%

100.00%

100.00%

Percentage owned of outstanding warrants

94.00%

Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill

$18,653,000

$8,300,000

$8,300,000

Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Deferred Revenue

5,392,000

0

0

6,688,000

Business Combination, Contingent Consideration, Liability

2,700,000

1,400,000

Business Combination, Acquisition Related Costs

3,019,000

2,173,000

0

1,700,000

1,300,000

400,000

Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual

12,000,000

200,000

8,700,000

Premium to be paid per share

€ 0.15

Percentage ownership that triggers premium payment

95.00%

Business combination, payment of contingent consideration

2,225,000

0

0

Goodwill, Acquired During Period

15,717,000

7,024,000

Goodwill- original estimate

16,200,000

7,000,000

Goodwill, Purchase Accounting Adjustments

151,000

500,000

200,000

Goodwill

21,563,000

21,563,000

7,024,000

0

15,717,000

7,175,000

Business Combination, Consideration Transferred

32,000,000

13,500,000

Deferred Tax Assets, Gross

$5,199,000

Business_Combination_Assets_Ac

Business Combination Assets Acquired and Liabilities Assumed (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Jan. 08, 2014	Dec. 16, 2013
In Thousands, unless otherwise specified
Business Acquisition [Line Items]
Goodwill	$21,563	$7,024	$0
SignalDemand [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets					881
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill	8,300				8,300
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Assets Noncurrent					2,447
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities					1,560
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Deferred Revenue					6,688
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net				29,134	13,500
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Other					2,752
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets					193
Cameleon Acquistion [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents				7,086
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables				10,395
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets				1,418
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill				18,653
Goodwill				15,717	7,175
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities				12,539
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Deferred Revenue	0			5,392
Business Combination, Acquisition of Less than 100 Percent, Noncontrolling Interest, Fair Value				$6,204

Business_Combination_Schedule_

Business Combination Schedule of Intangible Assets Acquired (Details) (USD $)	12 Months Ended		0 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 16, 2013	Jan. 08, 2014
Trade Names [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	8 years	2 years
Customer Relationships [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	7 years	8 years
Maintenance relationship [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	8 years
Developed Technology Rights [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	7 years	7 years
SignalDemand [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived Intangible Assets Acquired			$8,300
Business Acquisition, Purchase Price Allocation, Amortizable Intangible Assets	8,300		8,300
SignalDemand [Member] | Trade Names [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived Intangible Assets Acquired	40
Finite-Lived Intangible Asset, Useful Life	2 years
SignalDemand [Member] | Customer Relationships [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived Intangible Assets Acquired	3,500
Finite-Lived Intangible Asset, Useful Life	8 years
SignalDemand [Member] | Developed Technology Rights [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived Intangible Assets Acquired	4,600
Finite-Lived Intangible Asset, Useful Life	7 years
SignalDemand [Member] | Software and Software Development Costs [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived Intangible Assets Acquired	160
Finite-Lived Intangible Asset, Useful Life	2 years
Cameleon Acquistion [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived Intangible Assets Acquired	18,653
Business Acquisition, Purchase Price Allocation, Amortizable Intangible Assets				18,653
Cameleon Acquistion [Member] | Trade Names [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived Intangible Assets Acquired	1,020
Finite-Lived Intangible Asset, Useful Life	8 years
Cameleon Acquistion [Member] | Customer Relationships [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived Intangible Assets Acquired	1,455
Cameleon Acquistion [Member] | Maintenance relationship [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived Intangible Assets Acquired	3,808
Finite-Lived Intangible Asset, Useful Life	8 years
Cameleon Acquistion [Member] | Developed Technology Rights [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived Intangible Assets Acquired	11,147
Finite-Lived Intangible Asset, Useful Life	7 years
Cameleon Acquistion [Member] | Other Intangible Assets [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived Intangible Assets Acquired	1,223
Finite-Lived Intangible Asset, Useful Life	2 years

Business_Combination_Pro_Forma

Business Combination Pro Forma (Details) (USD $)	3 Months Ended		12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Business Acquisition [Line Items]
Business Acquisition, Pro Forma Revenue	$186,081	$168,974			$120,345
Business Acquisition, Pro Forma Net Income (Loss)	($36,776)	($3,647)			($3,252)
Business Acquisition, Pro Forma Earnings Per Share, Basic			($1.27)	($0.13)	($0.12)

Noncontrolling_interest_Detail

Noncontrolling interest (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2014	Jan. 08, 2014
Noncontrolling Interest [Line Items]
Noncontrolling Interest, Increase from Business Combination	$6,147	$0	$0
Net Income (Loss) Attributable to Noncontrolling Interest	-907	0	0
Comprehensive (Income) Loss, Net of Tax, Attributable to Noncontrolling Interest	-922	0	0
Cameleon Acquistion [Member]
Noncontrolling Interest [Line Items]
Business Combination, Acquisition of Less than 100 Percent, Noncontrolling Interest, Fair Value					6,204
Noncontrolling Interest, Increase from Business Combination				5,282
Net Income (Loss) Attributable to Noncontrolling Interest				-907
Comprehensive (Income) Loss, Net of Tax, Attributable to Noncontrolling Interest				-15
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Deferred Revenue	$0			$0	$5,392

Goodwill_and_Intangible_Assets2

Goodwill and Intangible Assets (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2014
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization of Intangible Assets	$5,200,000	$100,000
Goodwill, Acquired During Period	15,717,000	7,024,000
Goodwill	7,024,000	0	21,563,000
Goodwill, Purchase Accounting Adjustments	151,000
Goodwill, Translation Adjustments	($1,329,000)

Goodwill_and_Intangible_Assets3

Goodwill and Intangible Assets Intangible Assets (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Translation Adjustments	$1,500
Finite-Lived Intangible Assets, Gross		8,300
Finite-Lived Intangible Assets, Accumulated Amortization		68
Finite-Lived Intangible Assets, Net	20,195	8,232
Developed Technology Rights [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	7 years	7 years
Finite-Lived Intangible Assets, Gross	14,567	4,600
Finite-Lived Intangible Assets, Accumulated Amortization	2,082	27
Finite-Lived Intangible Assets, Net	12,485	4,573
Internally Developed Technology Rights [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	2 years	2 years
Finite-Lived Intangible Assets, Gross	1,254	160
Finite-Lived Intangible Assets, Accumulated Amortization	620	3
Finite-Lived Intangible Assets, Net	634	157
Maintenance relationship [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	8 years
Finite-Lived Intangible Assets, Gross	3,591
Finite-Lived Intangible Assets, Accumulated Amortization	788
Finite-Lived Intangible Assets, Net	2,803
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	7 years	8 years
Finite-Lived Intangible Assets, Gross	4,853	3,500
Finite-Lived Intangible Assets, Accumulated Amortization	1,399	37
Finite-Lived Intangible Assets, Net	3,454	3,463
Trade Names [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	8 years	2 years
Finite-Lived Intangible Assets, Gross	952	40
Finite-Lived Intangible Assets, Accumulated Amortization	133	1
Finite-Lived Intangible Assets, Net	$819	$39

Goodwill_and_Intangible_Assets4

Goodwill and Intangible Assets Future Amortization (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Goodwill and Intangible Assets Disclosure [Abstract]
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months	$4,429
Finite-Lived Intangible Assets, Amortization Expense, Year Two	3,254
Finite-Lived Intangible Assets, Amortization Expense, Year Three	3,000
Finite-Lived Intangible Assets, Amortization Expense, Year Four	3,000
Finite-Lived Intangible Assets, Amortization Expense, Year Five	2,873
Finite-Lived Intangible Assets, Amortization Expense, after Year Five	3,639
Finite-Lived Intangible Assets, Net	$20,195	$8,232

Accounts_Receivable_and_Contra2

Accounts Receivable and Contracts in Progress (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts Receivable, Gross	$64,004,000	$40,842,000
Unbilled Receivables, Current	7,959,000	6,784,000
Accounts Receivable, Net, Current	71,963,000	47,626,000
Allowance for Doubtful Accounts Receivable	-868,000	-1,060,000
Account and Unbilled Receivables, Net	71,095,000	46,566,000
Allowance for Loan and Lease Losses, Provision for Loss, Net	-100,000	400,000	-300,000
Deferred Revenue, Revenue Recognized	349,874,000	221,905,000
Deferred Revenue and Credits	-400,349,000	-260,372,000
Deferred Revenue, Period Increase (Decrease)	-50,475,000	-38,467,000
Deferred Revenue	-58,434,000	-45,251,000
Deferred Maintenance and Support Revenue	$20,200,000	$11,400,000

Earnings_per_Share_Basis_and_D

Earnings per Share Basis and Diluted (Details) (USD $)	3 Months Ended								12 Months Ended
In Thousands, except Share data, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Numerator
Net income	($17,459)	($3,734)	($6,996)	($8,455)	$139	$993	$580	$1,734	($36,644)	$3,446	$4,966
Denominator
Weighted average shares (basic)									28,915,496	28,004,019	27,365,731
Dilutive effect of potential common shares									0	2,110,354	1,054,000
Weighted Average Number of Shares Outstanding, Diluted									28,915,496	30,114,373	28,419,956
Basic earnings per share	($0.60)	($0.13)	($0.24)	($0.29)	$0	$0.04	$0.02	$0.06	($1.27)	$0.12	$0.18
Diluted earnings per share	($0.60)	($0.13)	($0.24)	($0.29)	$0	$0.03	$0.02	$0.06	($1.27)	$0.11	$0.17
Antidilutive potential common shares excluded from computation of earnings per share									452,000	14,000	416,000
Debt Instrument, Convertible, Stock Price Trigger									$33.79

Property_and_Equipment_net_Det

Property and Equipment, net (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$31,873,000	$27,539,000
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	-16,085,000	-11,952,000
Property, Plant and Equipment, Net	15,788,000	15,587,000
Depreciation	5,000,000	4,189,000	2,188,000
Disposal of Property Plant and Equipment		1,500,000	800,000
Full Depreciated Assets in Use	6,700,000	3,800,000
Internal-use software development costs capitalized	2,305,000	2,874,000	2,013,000
Internal Use Software Developed, Subject To Amortization	1,600,000	1,700,000
Capitalized Computer Software, Amortization	200,000	500,000
Tangible Asset Impairment Charges	4,040,000	0	0
Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	2,874,000	2,423,000
Furniture and Fixtures [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	7 years
Furniture and Fixtures [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	10 years
Computer Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	15,662,000	10,857,000
Computer Equipment [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	3 years
Computer Equipment [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	5 years
Software [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	5,068,000	4,322,000
Software [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	2 years
Software [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	6 years
Software Development [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	3 years
Property, Plant and Equipment, Gross	2,639,000	5,064,000
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Estimated Useful Lives	ShorterB ofB leaseB term orB usefulB life
Property, Plant and Equipment, Gross	5,625,000	4,568,000
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	5,000	305,000
Cloud-based product offerings [Member]
Property, Plant and Equipment [Line Items]
Internal-use software development costs capitalized	$2,500,000	$3,100,000

Fair_Value_Measurements_Detail

Fair Value Measurements (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Fair Value Disclosures [Abstract]
Treasury money market funds, at fair value	$135.30	$21

Stockholders_Equity_Details

Stockholders Equity (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014
Stockholders' Equity Attributable to Parent [Abstract]
Stock Repurchase Program, Remaining Authorized Repurchase Amount	$10
Stock Repurchase Program, Authorized Amount	$15

Noncash_Sharebased_Compensatio2

Noncash Share-based Compensation (Details)	1 Months Ended
	Feb. 29, 2012	Dec. 31, 2014	Dec. 31, 2013
Noncash Share-based Compensation (Narrative) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized	900,000
Shares available for future grants		867,109
Stock options
Noncash Share-based Compensation (Narrative) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number		961,377	1,160,000
RSUs
Noncash Share-based Compensation (Narrative) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number		1,864,000
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding, Number		1,830,291	1,543,000
SARs
Noncash Share-based Compensation (Narrative) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number		673,000
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding, Number		673,068	721,000
MSUs
Noncash Share-based Compensation (Narrative) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number		444,000	469,000
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding, Number		444,272	469,000
1999 Equity Incentive Plan [Member]
Noncash Share-based Compensation (Narrative) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number		33,325
2007 Equity Incentive Plan [Member]
Noncash Share-based Compensation (Narrative) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number		3,634,758

Noncash_Sharebased_Compensatio3

Noncash Share-based Compensation Expense (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense	$22,665,000	$16,099,000	$9,645,000
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized	45,600,000
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition	2 years 5 months 0 days
Cost of revenue
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense	3,469,000	2,071,000	1,451,000
Selling and Marketing Expense [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense	5,142,000	3,834,000	2,335,000
General and Administrative Expense [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense	9,375,000	7,055,000	3,938,000
Research and development
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense	4,679,000	3,139,000	1,921,000
Stock compensation in operating expense [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based compensation expense	$19,196,000	$14,028,000	$8,194,000

Noncash_Sharebased_Compensatio4

Noncash Share-based Compensation Noncash Share-based Compensation Share Based Compensation - Stock Option Rollforward (Details) (USD $)	12 Months Ended
In Thousands, except Share data, unless otherwise specified	Dec. 31, 2014		Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2014
Employee Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number	1,160,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures	0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period	-196,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period	0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period	3,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number	961,377
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Number	961,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price	$11.12
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price	$0
Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price	$7.37
Share-based Compensation Arrangements by Share-based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price	$0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period, Weighted Average Exercise Price	$14.93
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price	$11.87
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price	$11.87
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term	2 years 9 months 18 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Weighted Average Remaining Contractual Term	2 years 9 months 18 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value	$15,006	[1]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value	15,006	[1]
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period	1,028,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number	1,864,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term	4 years 7 months 25 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value	51,231	[2]
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding, Number	1,543,000				1,830,291
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period	-582,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period	-125,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number	1,822,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value	$18.25
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value	$33.46		$20.08	$18.65
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value	$17.42
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value	$25.28
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value	$26.67		$18.25
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Exercise Price	$26.60
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Remaining Contractual Term	4 years 7 months 21 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value	50,067	[2]
Stock Appreciation Rights (SARs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures	0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period	-48,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period	0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period	0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number	673,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Number	662,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price	$10.74
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price	$0
Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price	$10.59
Share-based Compensation Arrangements by Share-based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price	$0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period, Weighted Average Exercise Price	$0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price	$10.75
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term	5 years 9 months 26 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Weighted Average Remaining Contractual Term	5 years 9 months 22 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value	11,260	[3]
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding, Number	721,000				673,068
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number	673,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Remaining Contractual Term	5 years 9 months 26 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value	11,260	[3]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Aggregate Intrinsic Value	$11,083	[3]
Market Share Units (MSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number	469,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures	198,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period	205,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period	-18,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period	0
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Expired In Period, Weighted Average Grant Date Fair Value	$0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number	444,000
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding, Number	469,000				444,272
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value	$34.24
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value	$48.54
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value	$26.08
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value	$43.07
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value	$44.03
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Outstanding, Weighted Average Remaining Contractual Terms	6 years 3 months 18 days
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Intrinsic Value	$12,209,000	[4]
[1]	The aggregate intrinsic value was calculated based on the positive difference between the estimated fair value of the Companybs common stock on DecemberB 31, 2014 of $27.48 and the grant date fair value.
[2]	The aggregate intrinsic value was calculated based on the fair value of the Companybs common stock on DecemberB 31, 2014 of $27.48.
[3]	StockB appreciationrightsB WeightedB averageexercise priceB WeightedB averageremainingB contractualterm (year)B AggregateintrinsicB valueB (1)Outstanding, December 31, 2013721B $10.74 GrantedbB b Exercised(48)B 10.59 ForfeitedbB b ExpiredbB b Outstanding, December 31, 2014673B $10.75B 5.82B $11,260Exercisable at December 31, 2014662B $10.74B 5.81B $11,083Vested and expected to vest at December 31, 2014673B $10.75B 5.82B $11,260(1) The aggregate intrinsic value was calculated based on the positive difference between the estimated fair value of the Companybs common stock on DecemberB 31, 2014 of $27.48 and the exercise price of the underlying SARs.
[4]	The aggregate intrinsic value was calculated based on the positive difference between the estimated fair value of the Companybs common stock on DecemberB 31, 2014 of $27.48 and the grant date fair value of the underlying MSUs.

Noncash_Sharebased_Compensatio5

Noncash Share-based Compensation Narrative (Details) (USD $)	1 Months Ended		12 Months Ended
	Feb. 28, 2014	Feb. 29, 2012	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation arrangement by share-based payment, Minimum Employee Subscription rate			1.00%
Inducement grants - Feb 2014	308,250
Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized		900,000
Total shareholder return period for vesting of MSUs			three
Stock Price at Year End			$27.48
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Total Intrinsic Value			$4,500,000	$5,200,000	$600,000
Shares issuable upon vesting of MSUs, maximum			200.00%
Share-based Compensation Arrangement by Share-based Payment Award, Maximum Employee Subscription Rate			10.00%
Share-based Compensation Arrangement by Share-based Payment Award, Discount from Market Price, Offering Date			5.00%
Maximum Amount Contributable by employees under ESPP- Half yearly			5,000
Maximum Amount Contributable By Employees Under ESPP- Annually			10,000
Stock Issued During Period, Shares, Employee Stock Purchase Plans			13,392
ESPP contributions by Employees			$400,000
Market Share Units (MSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Inducement grants - Feb 2014	75,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number			444,000	469,000
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding, Number			444,272	469,000
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Inducement grants - Feb 2014	233,250
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding, Number			1,830,291	1,543,000
Employee Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized			486,608
2007 Equity Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized			8,168,000
2007 Equity Incentive Plan [Member] | Market Share Units (MSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding, Number			369,272
2007 Equity Incentive Plan [Member] | Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding, Number			1,631,041
December 2013 Market Stock Unit Performance Award [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total shareholder return period for vesting of MSUs			two
2007 Equity Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number			3,634,758

Noncash_Sharebased_Compensatio6

Noncash Share-based Compensation Assumptions (Details) (Market Share Units (MSUs) [Member])	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Market Share Units (MSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate	51.00%	57.00%	61.00%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate	0.68%	0.35%	0.28%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term	2 years 10 months 17 days	2 years 10 months 2 days	1 year 10 months 24 days
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate	0.00%	0.00%	0.00%

Income_Tax_Disclosure_Componen

Income Tax Disclosure Components of Income Tax (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Tax Disclosure [Abstract]
Current Federal Tax Expense (Benefit)	($935)	$2,444	$2,015
Current State and Foreign	790	160	74
Current Income Tax Expense (Benefit)	-145	2,604	2,089
Deferred Federal Income Tax Expense (Benefit)	12,334	-2,651	1,030
Deferred State and Local Income Tax Expense (Benefit)	304	-126	-68
Income Tax Expense (Benefit)	$12,493	($173)	$3,051

Income_Tax_Disclosure_Reconcil

Income Tax Disclosure Reconciliation of Federal Tax Rate (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Tax Disclosure - Reconciliation of Federal Tax Rate [Abstract]
Income Tax Reconciliation, Income Tax Expense (Benefit), at Federal Statutory Income Tax Rate	($8,520)	$1,113	$2,726
Income Tax Reconciliation, State and Local Income Taxes	49	-583	-84
Income Tax Reconciliation, Nondeductible Expense	653	235	214
Income Tax Reconciliation, Nondeductible Expense, Other	434	606	0
Effective income tax reconciliation, purchase accounting adjustment	990	0	0
Effective Income Tax Rate Reconciliation, Tax Credit, Foreign, Amount	837	135	111
Income Tax Reconciliation, Deductions, Qualified Production Activities	0	-47	-146
Income Tax Reconciliation, Nondeductible Expense, Share-based Compensation Cost	1,784	1,308	622
Research and Expirmentation Tax Credit Adjustment Prior Years	59	-1,254	-439
Income Tax Reconciliation, Tax Credits	-3,259	-2,165	-111
Income Tax Reconciliation, Other Adjustments	-40	-30	158
Income Tax Reconciliation, Change in Deferred Tax Assets Valuation Allowance	19,506	509	0
Income Tax Expense (Benefit)	$12,493	($173)	$3,051

Income_Tax_Disclosure_Tax_Effe

Income Tax Disclosure Tax Effect of Temporary Differences (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Tax Disclosure - Tax Effect of Temporary Differences [Abstract]
Deferred Tax Assets, Tax Credit Carryforwards, State and Foreign	$185	($7)
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Allowance for Doubtful Accounts	178	-191
Deferred Tax Assets, Operating Loss Carryforwards, Domestic and State	1,664	2,601
Deferred Tax Assets, Net, Current	2,027	2,403
Deferred Tax Assets, Valuation Allowance, Current	-1,953	-270
Deferred Tax Assets, Net of Valuation Allowance, Current	74	2,133
Deferred Tax Assets Property And Equipment Net	-2,186	-1,786
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits	9,095	7,808
Deferred Tax Assets, State Taxes	217	292
Deferred Tax Liabilities, Deferred Expense, Capitalized Software	-897	-1,541
Deferred Tax Liabilities, Intangible Assets	-2,193	-2,366
Deferred Tax Assets, Tax Credit Carryforwards, Research	4,316	2,708
Deferred Tax Asset, Deferred Revenue	56	431
Increase (Decrease) in Prepaid Expense and Other Assets	3,383	-1,204	-2,215
Deferred Tax Assets, Operating Loss Carryforwards	5,733	4,724
Deferred Tax Assets, Operating Loss Carryforwards, State and Local	537	813
Tax Credit Carryforward, Deferred Tax Asset	1,240	509
Deferred Tax Assets, Operating Loss Carryforwards, Foreign	10,111	0
Deferred Tax Assets, Tax Credit Carryforwards, Foreign	837	0
Deferred Tax Assets, Other	-21	0
Deferred Tax Assets, Net, Noncurrent	26,845	11,592
Deferred Tax Assets, Valuation Allowance, Noncurrent	-26,919	-1,087
Deferred Tax Liabilities, Net, Noncurrent	-74
Deferred Tax Assets, Net of Valuation Allowance, Noncurrent	0	10,505
Deferred Tax Assets, Net of Valuation Allowance	$0	$12,638

Income_Tax_Disclosure_Unrecogn

Income Tax Disclosure Unrecognized Tax Benefit (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Tax Disclosure [Abstract]
Unrecognized Tax Benefits	$395	$349	$349	$349
Unrecognized Tax Benefits, Increases Resulting from Prior Period Tax Positions	$46	$0

Income_Tax_Disclosure_Details

Income Tax Disclosure (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Operating Loss Carryforwards [Line Items]
Effective Income Tax Rate, Continuing Operations	-50.00%	-5.00%
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate			38.00%
Income Taxes Receivable	$1,400,000	$600,000
Deferred Tax Assets, Tax Credit Carryforwards, Foreign	837,000	0
Operating Loss Carryforwards	68,400,000
R&E tax credit carryforward for future use	5,600,000
Deferred Tax Assets, Operating Loss Carryforwards, Domestic	16,400,000
Unrealized excess tax benefit related to stock compensation	7,200,000
Deferred tax asset, valuation allowance, domestic	16,200,000
Undistributed Earnings of Foreign Subsidiaries	300,000
Unrecognized Tax Benefits	395,000	349,000	349,000	349,000
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	56,000	3,000	3,000
Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Amount of Unrecorded Benefit	0
Foreign tax paid	100,000
Cameleon Acquistion [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	$33,800,000

Convertible_debt_Details

Convertible debt (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Debt Instrument [Line Items]
Debt Instrument, Periodic Payment, Interest	$162,000
Amortization of Financing Costs	46,000	50,000
Convertible debt, issuance cost, equity component	1,200,000
Debt Instrument, Fair Value Disclosure	114,700,000
Debt Instrument, Face Amount	143,800,000
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate	2.00%
Purchase of convertible bond hedge	29,411,000	0	0
Investment Warrants, Exercise Price	$45.48
Proceeds from Issuance of Warrants	17,106,000	0	0
Debt Instrument, Convertible, Conversion Ratio	29.5972
Debt Instrument, Convertible, Stock Price Trigger	$33.79
Debt Issuance Cost	0	0	-250,000
Debt Instrument, Unamortized Discount (Premium), Net	-33,302,000
Convertible Debt, Noncurrent	110,448,000	0
Debt Instrument, Convertible, Carrying Amount of Equity Component	28,714,000
Amortization of Debt Discount (Premium)	283,000
Convertible Debt [Member]
Debt Instrument [Line Items]
Debt Issuance Cost	$4,300,000

Credit_Facility_Details

Credit Facility (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Line of Credit Facility [Line Items]
Debt Instrument, Face Amount	$50,000,000
Debt Instrument, Covenant, Minimum Amount of Cash And Cash Equivalent	20,000,000
Unamortized Debt Issuance Expense	100,000	200,000
Amortization of Financing Costs	$46,000	$50,000
LIBOR Rate [Member]
Line of Credit Facility [Line Items]
Debt Instrument, Interest Rate, Stated Percentage Rate Range, Minimum	1.50%
Debt Instrument, Interest Rate, Stated Percentage Rate Range, Maximum	2.30%
Federal Funds Rate [Member]
Line of Credit Facility [Line Items]
Debt Instrument, Interest Rate, Stated Percentage Rate Range, Minimum	1.50%
Debt Instrument, Interest Rate, Stated Percentage Rate Range, Maximum	2.30%

Commitments_and_Contingencies_1

Commitments and Contingencies (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Commitments and Contingencies Disclosure [Abstract]
Operating Leases, Rent Expense, Net	$3.30	$2.10	$2

Commitments_and_Contingencies_2

Commitments and Contingencies Future minimum lease commitments (Details) (USD $)	Dec. 31, 2014
In Thousands, unless otherwise specified
Future minimum lease commitments [Line Items]
Operating Leases, Future Minimum Payments Due, Next Twelve Months	$2,843
Operating Leases, Future Minimum Payments, Due in Two Years	1,822
Operating Leases, Future Minimum Payments, Due in Three Years	573
Operating Leases, Future Minimum Payments, Due in Four Years	90
Operating Leases, Future Minimum Payments, Due Thereafter	0
Operating Leases, Future Minimum Payments Due	$5,328

Segments_International_Revenue

Segments International Revenue (Details) (USD $)	3 Months Ended								12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration Risk, Geographic									103743000	79765000	66160
Revenues	$53,829	$46,719	$44,368	$40,913	$38,871	$36,813	$35,527	$33,626	$185,829	$144,837	$117,791
percentage of total revenue									100.00%	100.00%	100.00%
International Revenue [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
percentage of total revenue									56.00%	55.00%	56.00%
UNITED STATES
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues									82,086	65,072	51,631
percentage of total revenue									44.00%	45.00%	44.00%
South America and Canada [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues									15,365	12,222	5,457
percentage of total revenue									8.00%	8.00%	5.00%
North and South America [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues									97,451	77,294	57,088
percentage of total revenue									52.00%	54.00%	49.00%
Europe [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues									45,987	33,666	31,545
percentage of total revenue									25.00%	23.00%	27.00%
Pacific [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues									34,170	22,411	15,356
percentage of total revenue									18.00%	15.00%	13.00%
Middle East [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues									6,239	9,840	10,914
percentage of total revenue									3.00%	7.00%	9.00%
Africa [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues									$1,982	$1,626	$2,888
percentage of total revenue									1.00%	1.00%	2.00%

Concentrations_of_Risk_Details

Concentrations of Risk (Details)	12 Months Ended
	Dec. 31, 2014
Sales Revenue, Net [Member]
Concentration Risk [Line Items]
Concentration Risk, Percentage	10.00%
Accounts Receivable [Member]
Concentration Risk [Line Items]
Concentration Risk, Percentage	11.00%

Employment_Retirement_Savings_

Employment Retirement Savings (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Contributions by Employer	$1.40	$1.10	$1
Matching Percentage of Salary Contribution by Qualified Employees	50.00%
Qualified Employees Contribution Matching Percentage by the Employer	6.00%

Quarterly_Results_Quarterly_Fi1

Quarterly Results Quarterly Financial Data (Details) (USD $)	3 Months Ended								12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Quarterly Financial Information Disclosure [Abstract]
Revenues	$53,829	$46,719	$44,368	$40,913	$38,871	$36,813	$35,527	$33,626	$185,829	$144,837	$117,791
Gross Profit	39,319	32,442	29,615	26,367	28,101	25,787	24,741	23,073	127,743	101,702	84,006
Operating Income (Loss)	-2,316	-3,720	-7,871	-8,500	409	1,395	780	689	-22,407	3,538	8,180
Net Income (Loss) Attributable to Parent	($17,459)	($3,734)	($6,996)	($8,455)	$139	$993	$580	$1,734	($36,644)	$3,446	$4,966
Basic earnings per share	($0.60)	($0.13)	($0.24)	($0.29)	$0	$0.04	$0.02	$0.06	($1.27)	$0.12	$0.18
Diluted	($0.60)	($0.13)	($0.24)	($0.29)	$0	$0.03	$0.02	$0.06	($1.27)	$0.11	$0.17

Quarterly_Results_Narrative_De

Quarterly Results Narrative (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014
Quarterly Financial Information Disclosure [Abstract]
Adjustment to gross profit	$1	$1	$1

Schedule_II_Valuation_and_Qual1

Schedule II - Valuation and Qualifying Accounts (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2014
Allowance for Doubtful Accounts [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Valuation Allowances and Reserves, Balance	$1,060	[1]	$760	[1]	$1,130	[1]	$868	[1]
Valuation Allowances and Reserves, Charged to Cost and Expense	8	[1]	369	[1]	0	[1]
Valuation Allowances and Reserves, Deductions	-200	[1]	-69	[1]	-370	[1]
Valuation Allowances and Reserves, Charged to Other Accounts	0	[1],[2]	0	[1],[2]	0	[1],[2]
Valuation Allowance of Deferred Tax Assets [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Valuation Allowances and Reserves, Balance	1,357		0		0		28,872
Valuation Allowances and Reserves, Charged to Cost and Expense	19,506		509		0
Valuation Allowances and Reserves, Deductions	0		0		0
Valuation Allowances and Reserves, Charged to Other Accounts	$8,009	[2]			$0	[2]
[1]	Deductions column represents the reversal of additions previously charged to costs and expenses and uncollectible accounts written off, net of recoveries.
[2]	Additions represent valuation allowance adjustments recorded as part of the purchase accounting allocation related to the SignalDemand and Cameleon acquisitions.