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Multiple-Deliverable Revenue Arrangements (Details Textuals) (Contractual Arrangements, Maintenance and other support obligations, USD $)
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3 Months Ended | 9 Months Ended | |
|---|---|---|---|
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Sep. 30, 2012
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Sep. 30, 2012
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Dec. 31, 2011
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Contractual Arrangements | Maintenance and other support obligations
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| Revenue Recognition, Multiple-deliverable Arrangements [Line Items] | |||
| Revenue recognized | $ 51,000 | $ 152,000 | |
| Deferred revenue in the condensed consolidated balance sheets | $ 758,000 | $ 758,000 | $ 910,000 |