Quarterly report pursuant to Section 13 or 15(d)

Acquisition-related contingent consideration (Details)

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Acquisition-related contingent consideration (Details)
 9 Months Ended
Jun. 30, 2012
USD ($)
Sep. 30, 2011
USD ($)
Jun. 30, 2012
DeltaWare
USD ($)
Jun. 30, 2011
DeltaWare
USD ($)
Feb. 10, 2010
DeltaWare
USD ($)
Feb. 10, 2010
DeltaWare
CAD
Jun. 30, 2012
DeltaWare
Maximum
CAD
Acquisition Disclosures              
Share capital acquired (as a percent)         100.00% 100.00%  
Contingent consideration arrangements related to profitability targets         $ 2,000,000 2,000,000  
Contingent consideration arrangements related to sale of acquiree products         4,000,000 4,000,000  
Contingent consideration payable based upon sales of acquiree products             1,000,000
Acquisition-related contingent consideration              
Balance at the beginning of the period, current portion 1,951,000 1,840,000 1,840,000        
Balance at the beginning of the period,long-term portion 390,000 388,000 388,000        
Balance at the beginning of the period     2,228,000        
Additional estimated consideration, current portion     101,000        
Additional estimated consideration, long-term portion     400,000        
Total additional estimated consideration     101,000 200,000      
Foreign currency translation, current portion     10,000        
Foreign currency translation, long-term portion     2,000        
Total foreign currency translation     12,000        
Balance at the end of the period, long-term portion 390,000 388,000 390,000        
Balance at the end of the period, current portion 1,951,000 1,840,000 1,951,000        
Balance at the end of the period     $ 2,341,000