Quarterly report pursuant to Section 13 or 15(d)

Commitments and Contingencies Commitments and Contingencies-Additional Details (Details)

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Commitments and Contingencies Commitments and Contingencies-Additional Details (Details)
0 Months Ended 3 Months Ended
Jul. 30, 2012
patent
Jul. 17, 2012
patent
Mar. 31, 2013
patent
Commitments and Contingencies Disclosure [Abstract]      
Number of patents in connection with patent infrigement 3 19 19
Number of patents in connection with patent infringement matters     5
Number of patents in connection with patent infringement matters, additions     1