Acquisitions (Details Textual)
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Jan. 31, 2013
USD ($)
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Sep. 01, 2012
USD ($)
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Sep. 01, 2012
EUR (€)
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Jan. 31, 2012
USD ($)
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Sep. 01, 2009
USD ($)
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Sep. 01, 2009
EUR (€)
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Jan. 31, 2013
Flashlight Engineering and Consulting L L C [Member]
USD ($)
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Jun. 19, 2012
Flashlight Engineering and Consulting L L C [Member]
USD ($)
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Jan. 31, 2013
Event I S Group B V [Member]
USD ($)
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Sep. 01, 2009
Event I S Group B V [Member]
USD ($)
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Sep. 01, 2009
Event I S Group B V [Member]
EUR (€)
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Jan. 31, 2013
Event I S Group B V [Member]
Restricted Stock [Member]
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Sep. 01, 2009
Event I S Group B V [Member]
Restricted Stock [Member]
USD ($)
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Jan. 31, 2013
Event I S Group B V [Member]
Unvested Restricted Stock Accelerated [Member]
Amended Purchase Agreement [Member]
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Jan. 31, 2013
Vivid Logic Inc [Member]
USD ($)
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Jan. 31, 2013
Vivid Logic Inc [Member]
Subsequent Event [Member]
USD ($)
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Business Acquisition, Cost of Acquired Entity, Cash Paid | $ 300,000 | $ 44,000,000 | $ 1,000,000 | |||||||||||||||||||||
Business Acquisition, Contingent Consideration, Potential Cash Payment | 200,000 | 2,000,000 | ||||||||||||||||||||||
Business Combination, Consideration Transferred | 26,000,000 | 36,600,000 | ||||||||||||||||||||||
Acquisition-related consideration | $ 5,656,000 | [1] | $ 2,200,000 | [1] | € 1,700,000 | [1] | $ 12,255,000 | [1] | $ 1,000,000 | [1] | € 800,000 | [1] | $ 1,600,000 | € 1,200,000 | $ 1,100,000 | |||||||||
Business Acquisition Equity Interests Issued Number Of Shares Issued | 304,000 | 102,000 | ||||||||||||||||||||||
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