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Acquisitions - Additional Information (Detail) (USD $)
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0 Months Ended | 1 Months Ended | 12 Months Ended | 0 Months Ended | 12 Months Ended | 1 Months Ended | ||||||||
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Dec. 31, 2013
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Dec. 31, 2012
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Dec. 31, 2011
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Mar. 07, 2014
Subsequent Event [Member]
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Jul. 19, 2011
Xively [Member]
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Jul. 31, 2013
Xively [Member]
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Jul. 31, 2012
Xively [Member]
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Dec. 31, 2013
Xively [Member]
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Dec. 31, 2011
Xively [Member]
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Jan. 06, 2012
Bold [Member]
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Dec. 31, 2013
Bold [Member]
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Dec. 31, 2012
Bold [Member]
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Dec. 31, 2011
Bold [Member]
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Jan. 31, 2014
Bold [Member]
Subsequent Event [Member]
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| Business Acquisition [Line Items] | ||||||||||||||
| Initial cash payment | $ 7,500,000 | $ 10,000,000 | $ 10,000,000 | $ 15,300,000 | ||||||||||
| Contingent payment | 161,000 | 212,000 | 4,000,000 | 5,200,000 | 193,000 | 1,500,000 | ||||||||
| Range of contingent payments, Minimum | 0 | 0 | ||||||||||||
| Range of contingent payments, Maximum | 4,900,000 | 1,500,000 | ||||||||||||
| Actual contingent payment paid | 3,200,000 | 1,700,000 | 598,000 | 71,000 | 827,000 | |||||||||
| Contingent payment provision to a non-employee shareholder, Minimum | 0 | |||||||||||||
| Contingent payment provision to a non-employee shareholder, Maximum | 267,000 | |||||||||||||
| Acquisition-related costs | $ 269,000 | $ 82,000 | $ 110,000 | |||||||||||
| Maturity period for contingent payment | 2 years | 2 years | ||||||||||||