Quarterly report pursuant to Section 13 or 15(d)

Acquisition-related contingent consideration (Details)

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Acquisition-related contingent consideration (Details)
 6 Months Ended
Mar. 31, 2012
USD ($)
Sep. 30, 2011
USD ($)
Mar. 31, 2012
DeltaWare
USD ($)
Mar. 31, 2011
DeltaWare
USD ($)
Feb. 28, 2011
DeltaWare
USD ($)
Feb. 28, 2011
DeltaWare
CAD
Mar. 31, 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 2,005,000 1,840,000 1,840,000        
Balance at the beginning of the period,long-term portion 401,000 388,000 388,000        
Balance at the beginning of the period     2,228,000        
Additional estimated consideration, current portion     101,000        
Total additional estimated consideration     101,000 200,000      
Foreign currency translation, current portion     64,000        
Foreign currency translation, long-term portion     13,000        
Total foreign currency translation     77,000        
Balance at the end of the period,long-term portion 401,000 388,000 401,000        
Balance at the end of the period, current portion 2,005,000 1,840,000 2,005,000        
Balance at the end of the period     $ 2,406,000