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Business Combinations Business Combinations (Details Textual) (USD $)
6 Months Ended 6 Months Ended 3 Months Ended 6 Months Ended 1 Months Ended 1 Months Ended 0 Months Ended 0 Months Ended
Sep. 30, 2012
Fox Enterprise [Member]
Apr. 30, 2012
Fox Enterprise [Member]
Sep. 30, 2012
Alvand Technologies [Member]
Apr. 30, 2012
Alvand Technologies [Member]
Apr. 16, 2012
Alvand Technologies [Member]
Sep. 30, 2012
NXP B.V [Member]
Sep. 30, 2012
NXP B.V [Member]
Jul. 19, 2012
NXP B.V [Member]
Apr. 30, 2012
Developed Technology Rights [Member]
Fox Enterprise [Member]
Jul. 19, 2012
Developed Technology Rights [Member]
NXP B.V [Member]
Y
Apr. 30, 2012
In Process Research and Development [Member]
Fox Enterprise [Member]
Jul. 19, 2012
In Process Research and Development [Member]
NXP B.V [Member]
Apr. 30, 2012
Customer Relationships [Member]
Fox Enterprise [Member]
Y
Jul. 19, 2012
Customer Relationships [Member]
NXP B.V [Member]
Y
Apr. 30, 2012
Trademarks [Member]
Fox Enterprise [Member]
Y
Apr. 16, 2012
Order or Production Backlog [Member]
Alvand Technologies [Member]
Y
Jul. 19, 2012
Order or Production Backlog [Member]
NXP B.V [Member]
Apr. 16, 2012
Noncompete Agreements [Member]
Alvand Technologies [Member]
Y
Business Acquisition                                    
Maximum Discount rate used in discounted cash flow model                         20.00%          
Discount rate used in discounted cash flow model                 15.00%   21.00%       20.00% 15.00%   22.00%
Acquired Finite-lived Intangible Asset, Weighted Average Useful Life (in years)                   5     4 3 3 1   3
Minimum Discount rate used in discounted cash flow model                         15.00%          
Total purchase price   $ 28,921,000     $ 23,302,000     $ 27,162,000                    
Cash consideration   25,700,000     20,500,000     31,200,000                    
Accounts receivable   4,053,000     211,000     4,000,000                    
Maximum payment for contingent consideration   3,200,000     2,800,000                          
Acquisition-related costs incurred 200,000   100,000     1,800,000 3,900,000                      
Dicount rate used in excess earnings method                   26.00%   31.00%         18.70%  
In process research and development completion time 12 months         27 months                        
Discount rate used in With and Without Method                           28.70%        
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High   $ 4,000,000   $ 4,000,000