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Summary Of Significant Accounting Policies Changes in fair value of contingent consideration (Tables)
 12 Months Ended
Sep. 30, 2015
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]  
Changes in fair value of contingent consideration [Table Text Block]
Changes in the fair value of Level 3 contingent consideration liability associated with our acquisitions of ThingWorx and ColdLight were as follows:
 
Contingent Consideration
 
(in thousands)
 
ThingWorx
 
ColdLight
Balance at October 1, 2013
—

 
—

Contingent consideration at acquisition
13,048

 
—

Change in fair value of contingent consideration
2,143

 
—

Balance at October 1, 2014
15,191

 
—

Contingent consideration at acquisition
—

 
3,800

Change in fair value of contingent consideration
2,809

 
200

Payment of contingent consideration
(9,000
)
 
—

Balance at September 30, 2015
$
9,000

 
$
4,000