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Acquisition (Details 1) (USD $) In Thousands, unless otherwise specified | Jul. 31, 2012 | Sep. 30, 2012 Jingle Networks, Inc [Member]
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Summary of allocation of fair value of assets acquired and liabilities assumed |  |
Cash acquired |  | $ 761
Accounts receivable |  | 4,740
Current assets |  | 2,538
Deferred tax assets |  | 62
Property and equipment |  | 206
Other non-current assets |  | 148
Intangible assets | 12,000 | 11,966
Goodwill |  | 47,290
Total assets acquired |  | 67,711
Current liabilities |  | (5,512)
Non-current deferred tax liabilities |  | (3,246)
Other non-current liabilities |  | (92)
Total liabilities assumed |  | (8,850)
Net assets acquired |  | $ 58,861

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