Summary of Significant Accounting Policies	3 Months Ended
Mar. 31, 2015
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies Business Omnicell, Inc. was incorporated in California in 1992 under the name Omnicell Technologies, Inc. and reincorporated in Delaware in 2001 as Omnicell, Inc. Our major products are automated medication, supply control systems and medication adherence solutions which are sold in our principal market, which is the healthcare industry. Our market is primarily located in the United States and Canada. "Omnicell," "our," "us," "we," or the "Company" collectively refer to Omnicell, Inc. and its subsidiaries. Basis of presentation The accompanying unaudited Condensed Consolidated Financial Statements reflect, in the opinion of management, all adjustments, consisting of normal recurring adjustments and accruals, necessary to present fairly the financial position of the Company as of March 31, 2015 and December 31, 2014, the results of their operations, comprehensive income and cash flows for the three months ended March 31, 2015 and March 31, 2014. Certain information and footnote disclosures normally included in financial statements prepared in accordance with U.S. generally accepted accounting principles (“GAAP”) have been condensed or omitted in accordance with the rules and regulations of the Securities and Exchange Commission (“SEC”). These unaudited Condensed Consolidated Financial Statements should be read in conjunction with the audited Consolidated Financial Statements and accompanying Notes included in our annual report on Form 10-K for the year ended December 31, 2014. Our results of operations, comprehensive income and cash flows for the three months ended March 31, 2015 are not necessarily indicative of results that may be expected for the year ending December 31, 2015, or for any future period. Principles of consolidation The Condensed Consolidated Financial Statements include the accounts of the Company and its subsidiaries. All intercompany accounts and transactions have been eliminated in consolidation. Use of estimates The preparation of financial statements in accordance with U.S. GAAP requires management to make estimates and assumptions that affect the amounts reported in our Condensed Consolidated Financial Statements and accompanying Notes. Management bases its estimates on historical experience and various other assumptions believed to be reasonable. Although these estimates are based on management's best knowledge of current events and actions that may impact the Company in the future, actual results may be different from the estimates. Our critical accounting policies are those that affect our financial statements materially and involve difficult, subjective or complex judgments by management. Those policies are revenue recognition, share-based compensation, inventory valuation, valuation of goodwill, purchased intangibles and long-lived assets, and accounting for income taxes. Segment reporting change In the first quarter of 2015, we modified the segment presentation to reflect the changes in how our Chief Operating Decision Maker (“CODM”) reviews the segments and the overall business. With the increase in acquisitions in the last two years the CODM changed how the financial information was reviewed to exclude general corporate-level costs that are not specific to either of the reporting segments when evaluating the operating results of each segment. Corporate-level costs include expenses related to executive management, finance and accounting, human resources, legal, training and development, and certain administrative expenses. The historical information presented has been retrospectively adjusted to reflect the modified segment reporting. Our CODM allocates resources and evaluates the performance of our segments using information about its revenues, gross profit and income from operations, excluding certain costs which are managed separately at the corporate level. We enhanced our segment reporting structure to match our operating structure based on how our Chief Operating Decision Maker (“CODM”) views the business and allocates resources, beginning in the first quarter of 2015. Our CODM is our Chief Executive Officer. Retrospective adjustments of prior period financial information have been made to conform to the current period presentation. This change does not impact previously reported Condensed Consolidated Financial Statements. See Note 15, Segment Information, for additional information on our segment reporting change. Concentration of credit risk Financial instruments that may potentially subject us to concentrations of credit risk consist principally of cash equivalents and accounts receivable. Cash equivalents are maintained with several financial institutions and may exceed the amount of insurance provided on such balances. The majority of our accounts receivable are derived from sales to customers for commercial applications. We perform ongoing credit evaluations of our customers’ financial condition and limit the amount of credit extended when deemed necessary but generally require no collateral. We maintain reserves for potential credit losses. Our products are broadly distributed and there were no customers that accounted for more than 10% of our accounts receivable as of March 31, 2015 and December 31, 2014. We believe that we have no significant concentrations of credit risk as of March 31, 2015. Significant accounting policies There have been no material changes in our significant accounting policies for the three months ended March 31, 2015, as compared to the significant accounting policies described in our annual report on Form 10-K for the year ended December 31, 2014. Recently issued authoritative guidance In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers, which provides new guidance on the recognition of revenue and states that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. This standard will be effective for annual reporting periods beginning after December 15, 2016, including interim periods within that reporting period. Early application is not permitted, however, in April 2015, the FASB tentatively proposed a one-year deferral of the effective date. If the proposed deferral is approved, the new standard will become effective for us in the first quarter of fiscal 2018. We are currently evaluating the impact of the adoption of this accounting standard update on our consolidated financial position or results of operations. There was no other recently issued authoritative guidance that has a material impact on our Condensed Consolidated Financial Statements through the reporting date.

Summary of Significant Accounting Policies

Business

Omnicell, Inc. was incorporated in California in 1992 under the name Omnicell Technologies, Inc. and reincorporated in Delaware in 2001 as Omnicell, Inc. Our major products are automated medication, supply control systems and medication adherence solutions which are sold in our principal market, which is the healthcare industry. Our market is primarily located in the United States and Canada. "Omnicell," "our," "us," "we," or the "Company" collectively refer to Omnicell, Inc. and its subsidiaries.

Basis of presentation

The accompanying unaudited Condensed Consolidated Financial Statements reflect, in the opinion of management, all adjustments, consisting of normal recurring adjustments and accruals, necessary to present fairly the financial position of the Company as of March 31, 2015 and December 31, 2014, the results of their operations, comprehensive income and cash flows for the three months ended March 31, 2015 and March 31, 2014. Certain information and footnote disclosures normally included in financial statements prepared in accordance with U.S. generally accepted accounting principles (“GAAP”) have been condensed or omitted in accordance with the rules and regulations of the Securities and Exchange Commission (“SEC”). These unaudited Condensed Consolidated Financial Statements should be read in conjunction with the audited Consolidated Financial Statements and accompanying Notes included in our annual report on Form 10-K for the year ended December 31, 2014. Our results of operations, comprehensive income and cash flows for the three months ended March 31, 2015 are not necessarily indicative of results that may be expected for the year ending December 31, 2015, or for any future period.

Principles of consolidation

The Condensed Consolidated Financial Statements include the accounts of the Company and its subsidiaries. All intercompany accounts and transactions have been eliminated in consolidation.

Use of estimates

The preparation of financial statements in accordance with U.S. GAAP requires management to make estimates and assumptions that affect the amounts reported in our Condensed Consolidated Financial Statements and accompanying Notes. Management bases its estimates on historical experience and various other assumptions believed to be reasonable. Although these estimates are based on management's best knowledge of current events and actions that may impact the Company in the future, actual results may be different from the estimates. Our critical accounting policies are those that affect our financial statements materially and involve difficult, subjective or complex judgments by management. Those policies are revenue recognition, share-based compensation, inventory valuation, valuation of goodwill, purchased intangibles and long-lived assets, and accounting for income taxes.

Segment reporting change

In the first quarter of 2015, we modified the segment presentation to reflect the changes in how our Chief Operating Decision Maker (“CODM”) reviews the segments and the overall business. With the increase in acquisitions in the last two years the CODM changed how the financial information was reviewed to exclude general corporate-level costs that are not specific to either of the reporting segments when evaluating the operating results of each segment. Corporate-level costs include expenses related to executive management, finance and accounting, human resources, legal, training and development, and certain administrative expenses.

The historical information presented has been retrospectively adjusted to reflect the modified segment reporting. Our CODM allocates resources and evaluates the performance of our segments using information about its revenues, gross profit and income from operations, excluding certain costs which are managed separately at the corporate level. We enhanced our segment reporting structure to match our operating structure based on how our Chief Operating Decision Maker (“CODM”) views the business and allocates resources, beginning in the first quarter of 2015. Our CODM is our Chief Executive Officer. Retrospective adjustments of prior period financial information have been made to conform to the current period presentation. This change does not impact previously reported Condensed Consolidated Financial Statements. See Note 15, Segment Information, for additional information on our segment reporting change.

Concentration of credit risk

Financial instruments that may potentially subject us to concentrations of credit risk consist principally of cash equivalents and accounts receivable. Cash equivalents are maintained with several financial institutions and may exceed the amount of insurance provided on such balances. The majority of our accounts receivable are derived from sales to customers for commercial applications. We perform ongoing credit evaluations of our customers’ financial condition and limit the amount of credit extended when deemed necessary but generally require no collateral. We maintain reserves for potential credit losses. Our products are broadly distributed and there were no customers that accounted for more than 10% of our accounts receivable as of March 31, 2015 and December 31, 2014. We believe that we have no significant concentrations of credit risk as of March 31, 2015.

Significant accounting policies

There have been no material changes in our significant accounting policies for the three months ended March 31, 2015, as compared to the significant accounting policies described in our annual report on Form 10-K for the year ended December 31, 2014.

Recently issued authoritative guidance

In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers, which provides new guidance on the recognition of revenue and states that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. This standard will be effective for annual reporting periods beginning after December 15, 2016, including interim periods within that reporting period. Early application is not permitted, however, in April 2015, the FASB tentatively proposed a one-year deferral of the effective date. If the proposed deferral is approved, the new standard will become effective for us in the first quarter of fiscal 2018. We are currently evaluating the impact of the adoption of this accounting standard update on our consolidated financial position or results of operations.

There was no other recently issued authoritative guidance that has a material impact on our Condensed Consolidated Financial Statements through the reporting date.