Quarterly report pursuant to Section 13 or 15(d)

Other Non-Current Assets (Details)

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Other Non-Current Assets (Details) - USD ($)
$ in Thousands
Apr. 01, 2015
Jun. 30, 2015
Dec. 31, 2014
Investment in private companies   $ 2,750 $ 1,250
Deposits:      
Lease   2,180 1,811
Other   474 436
Unamortized convertible debt issuance costs   4,184 4,612
Other   2,033 1,407
Total other non-current assets   $ 11,621 $ 9,516
AlphaHedge Capital Partners, LLC      
Deposits:      
Number of shares purchased 150,000    
Ownership interest (as a percent) 10.30%    
Upfront consideration $ 1,500