Shareholder's Equity (Issuance of Ordinary Shares) (Details) (USD $) In Thousands, except Share data, unless otherwise specified	0 Months Ended		12 Months Ended
	Dec. 31, 2012	Dec. 20, 2012	Dec. 31, 2012	Dec. 31, 2011
Class of Stock [Line Items]
Number of ordinary shares issued, New Issues		14,496,929
Issuance of ordinary shares to Elan, value			26,000
Elan [Member]
Class of Stock [Line Items]
Number of ordinary shares issued, New Issues			14,496,929	14,496,929
Issuance of ordinary shares to Elan, shares	3,182,253
Issuance of ordinary shares to Elan, value		$ 26,000