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Accrued Liabilities | 3 Months Ended
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Mar. 31, 2014
Accrued Liabilities, Current [Abstract] |
Accrued Liabilities [Text Block] | Accrued Liabilities Accrued liabilities consist of the following (in thousands):
| March 31, 2014 |  | December 31, 2013
Rebates and lease buyouts | $ | 2,036 |  |  | $ | 1,699 |
Advance payments from customers | 3,778 |  |  | 4,971 |
Accrued Group Purchasing Organization (GPO) fees | 2,558 |  |  | 2,324 |
Technology license purchase obligation, current portion | 1,000 |  |  | 1,500 |
Taxes payable | 2,406 |  |  | 1,664 |
Other | 1,716 |  |  | 1,588 |
Total | $ | 13,494 |  |  | $ | 13,746 |

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- Definition Description and amounts of accrued and other liabilities disclosure at the end of the reporting period. This element may be used for the entire disclosure as a single block of text. + References No definition available. + Details
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Namespace Prefix: | omcl_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_AccruedLiabilitiesCurrentAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration