Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Oct. 31, 2013	Jan. 31, 2013
Current assets:
Cash and cash equivalents	$ 257,141	$ 31,890
Short-term investments	16,242	14,276
Accounts receivable, net of allowance for doubtful accounts of $255 and 305, respectively	48,603	37,094
Deferred income taxes	1,721	1,169
Income tax receivable	106	1,111
Note receivable-related party		253
Other current assets	4,635	1,097
Total current assets	328,448	86,890
Property and equipment, net	2,319	1,379
Capitalized internal-use software, net	1,629	880
Goodwill	4,709
Intangible assets, net	6,964
Other long-term assets	1,220	671
Total assets	345,289	89,820
Current liabilities:
Accounts payable	2,436	3,340
Accrued expenses	14,108	6,981
Income tax payable	195	5,183
Deferred revenue	53,514	38,785
Total current liabilities	70,253	54,289
Deferred income taxes, noncurrent	2,508	441
Other long-term liabilities	1,882	1,124
Total liabilities	74,643	55,854
Commitments and contingencies (Note 11)
Stockholders' equity:
Preferred stock
Common stock
Additional paid-in capital	228,339	2,101
Accumulated other comprehensive income	11	5
Retained earnings	42,295	24,927
Total stockholders' equity	270,646	33,966
Total liabilities and stockholders' equity	345,289	89,820
Series A convertible preferred stock [Member]
Stockholders' equity:
Preferred stock		2,996
Series B convertible preferred stock [Member]
Stockholders' equity:
Preferred stock		3,937
Class A common stock [Member]
Stockholders' equity:
Common stock
Class B common stock [Member]
Stockholders' equity:
Common stock	$ 1