CONDENSED CONSOLIDATED BALANCE SHEET (Unaudited) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Current assets:
Cash and cash equivalents	$ 143,934	$ 179,915
Accounts receivable, net	13,378	12,997
Inventories	3,699	3,726
Deferred tax asset, current portion	598	598
Prepaid expenses and other current assets	37,073	13,870
Total current assets	198,682	211,106
Property and equipment, net	57,860	54,123
Intangible assets, net	91,244	95,016
Goodwill	340,408	340,408
Deferred tax asset, net of current portion	3,785	3,785
Other assets	7,461	5,448
Total assets	699,440	709,886
Current liabilities:
Accounts payable	8,575	9,470
Accrued liabilities	30,601	59,271
Deferred revenue	13,178	12,106
Total current liabilities	52,354	80,847
Deferred tax liability	12,700	13,948
Other liabilities	5,949	6,094
Total liabilities	71,003	100,889
Commitments and contingencies (Note 5)
Stockholders' equity
Common stock, $0.0001 par value; 100,000 shares authorized; 35,638 and 34,839 shares issued and outstanding on March 31, 2012 and December 31, 2011, respectively	4	4
Additional paid-in capital	618,547	589,067
Accumulated earnings	9,886	19,926
Total stockholders' equity	628,437	608,997
Total liabilities and stockholders' equity	$ 699,440	$ 709,886