CONDENSED CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Apr. 30, 2013	Jan. 31, 2013
Current assets:
Cash and cash equivalents	$ 331,252	$ 305,939
Accounts receivable, net	37,916	63,948
Prepaid expenses and other current assets	7,191	6,861
Total current assets	376,359	376,748
Property and equipment, net	12,695	13,205
Other assets	460	492
Total assets	389,514	390,445
Current liabilities:
Accounts payable	2,533	1,632
Accrued payroll and compensation	21,191	28,123
Accrued expenses and other liabilities	9,421	7,636
Deferred revenue, current portion	84,933	79,568
Total current liabilities	118,078	116,959
Deferred revenue, non-current	32,404	35,144
Other liabilities, non-current	1,055	798
Total non-current liabilities	33,459	35,942
Total liabilities	151,537	152,901
Commitments and contingencies (Note 3)
Stockholders' equity:
Common stock: $0.001 par value; 1,000,000,000 shares authorized; 103,065,286 shares issued and outstanding at April 30, 2013, and 100,920,350 shares issued and outstanding at January 31, 2013	103	101
Accumulated other comprehensive loss	(149)	(135)
Additional paid-in capital	344,856	328,277
Accumulated deficit	(106,833)	(90,699)
Total stockholders' equity	237,977	237,544
Total liabilities and stockholders' equity	$ 389,514	$ 390,445