CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Jan. 31, 2013	Jan. 31, 2012
Current assets:
Cash	$ 100,494	$ 58,944
Accounts receivable, net	20,153	9,485
Inventories	8,918	6,786
Restricted cash	3	517
Deferred tax assets, current	1,220	861
Prepaid expenses and other current assets	2,360	1,226
Total current assets	133,148	77,819
Property and equipment, net	2,536	1,686
Deferred tax assets, non-current	938	426
Intangible assets, net	0	270
Other assets	1,981	1,538
Total assets	138,603	81,739
Current liabilities:
Accounts payable	6,674	6,481
Accrued liabilities	14,419	7,931
Income taxes payable	286	530
Deferred revenue, current	3,451	8,002
Total current liabilities	24,830	22,944
Deferred revenue, non-current	0	200
Other long-term liabilities	1,441	1,246
Total liabilities	26,271	24,390
Commitments and contingencies (Note 12)
Redeemable convertible preference shares (Note 8):
Series A, B, C and D redeemable convertible preference shares, $0.00045 par value per share- 5,611,111, 3,665,550, 3,027,777 and 2,222,222 shares authorized at January 31, 2012, respectively; 5,611,107, 3,629,253, 3,027,771 and 1,047,596 shares issued and outstanding at January 31, 2012, respectively; initial liquidation preference of $10,100, $13,000, $16,350 and $11,785 at January 31, 2012, respectively	0	50,900
Shareholders' equity:
Preference shares, $0.00045 par value per share, 20,000,000 shares authorized and no shares issued and outstanding at January 31, 2013; no shares authorized, issued and outstanding at January 31, 2012;	0	0
Ordinary shares, $0.00045 par value per share, 200,000,000 and 44,444,444 shares authorized at January 31, 2013 and at January 31, 2012, respectively; 27,035,074 shares issued and outstanding at January 31, 2013; 7,600,869 shares issued and outstanding at January 31, 2012	12	3
Additional paid-in capital	91,911	4,225
Retained earnings	20,409	2,221
Total shareholders' equity	112,332	6,449
Total liabilities, redeemable convertible preference shares and shareholders' equity	$ 138,603	$ 81,739