Shareholders' Equity (Schedule of Authorized But Unissued Ordinary Shares) (Details) In Thousands, unless otherwise specified	Dec. 31, 2013
Class of Stock [Line Items]
Authorized but unissued ordinary shares reserved (in shares)	12,718
2011 Equity Incentive Plan [Member]
Class of Stock [Line Items]
Authorized but unissued ordinary shares reserved (in shares)	8,917
2007 Equity Incentive Plan [Member]
Class of Stock [Line Items]
Authorized but unissued ordinary shares reserved (in shares)	988
2007 Employee Stock Purchase Plan [Member]
Class of Stock [Line Items]
Authorized but unissued ordinary shares reserved (in shares)	704
Amended and Restated 2007 Non-Employee Directors Stock Option Plan [Member]
Class of Stock [Line Items]
Authorized but unissued ordinary shares reserved (in shares)	374
Amended and Restated Directors Deferred Compensation Plan [Member]
Class of Stock [Line Items]
Authorized but unissued ordinary shares reserved (in shares)	183
Exercise of Warrants [Member]
Class of Stock [Line Items]
Authorized but unissued ordinary shares reserved (in shares)	1,552