Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Oct. 31, 2016	Jan. 31, 2016
Current assets:
Cash and cash equivalents	$ 313,455	$ 268,056
Marketable securities	58,645	39,837
Accounts receivable, net	41,394	39,408
Inventories	23,340	18,167
Restricted cash	8	7
Prepaid expenses and other current assets	4,762	4,170
Total current assets	441,604	369,645
Property and equipment, net	4,291	3,448
Deferred tax assets, non-current	6,024	4,626
Intangible assets, net	4,162	4,178
Goodwill	26,601	26,601
Other non-current assets	2,162	2,117
Total assets	484,844	410,615
Current liabilities:
Accounts payable	28,364	14,175
Accrued liabilities	23,332	23,778
Income taxes payable	1,359	787
Deferred revenue	6,885	10,077
Total current liabilities	59,940	48,817
Other long-term liabilities	2,291	12,342
Total liabilities	62,231	61,159
Commitments and contingencies (Note 13)	0	0
Shareholders' equity:
Preference shares, $0.00045 par value per share, 20,000,000 shares authorized and no shares issued and outstanding at October 31, 2016 and January 31, 2016, respectively	0	0
Ordinary shares, $0.00045 par value per share, 200,000,000 shares authorized at October 31, 2016 and January 31, 2016, respectively; 33,105,541 shares issued and outstanding at October 31, 2016; 32,333,359 shares issued and outstanding at January 31, 2016	15	15
Additional paid-in capital	198,554	176,306
Accumulated other comprehensive loss	(18)	(7)
Retained earnings	224,062	173,142
Total shareholders’ equity	422,613	349,456
Total liabilities and shareholders' equity	$ 484,844	$ 410,615