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Intangible Assets (Details Textual) (USD $)
 12 Months Ended 3 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2012
Acquired software licenses [Member]
Dec. 31, 2011
Acquired software licenses [Member]
Dec. 31, 2010
Acquired software licenses [Member]
Sep. 30, 2012
Intangible Assets [Member]
Mar. 31, 2012
Intangible Assets [Member]
Finite Lived Intangible Assets [Line Items]                
Purchased Intangible Assets Net $ 2,915,000 $ 35,361,000   $ 248,000 $ 341,000      
Intangible Assets Accumulated Amortization 9,856,000 7,159,000   2,100,000 3,700,000      
Loss on goodwill and purchased intangible assets impairment 49,521,000 3,277,000 0       7,300,000 22,800,000
Amortization expense       196,000 422,000 744,000    
Intangible Assets (Textual) [Abstract]                
Impairment loss   133,000 0          
Deduction on impairment charges $ 300,000              
Weighted average remaining useful life of long-lived intangible assets 3 years