Consolidated Balance Sheets - USD ($) $ in Thousands	Jan. 31, 2017	Jan. 31, 2016
Current assets:
Cash and cash equivalents	$ 322,872	$ 268,056
Marketable securities	82,522	39,837
Accounts receivable, net	38,596	39,408
Inventories	20,145	18,167
Restricted cash	8	7
Prepaid expenses and other current assets	4,392	4,170
Total current assets	468,535	369,645
Property and equipment, net	4,988	3,448
Deferred tax assets, non-current	5,774	4,626
Intangible assets, net	4,149	4,178
Goodwill	26,601	26,601
Other non-current assets	2,224	2,117
Total assets	512,271	410,615
Current liabilities:
Accounts payable	19,955	14,175
Accrued liabilities	26,448	23,778
Income taxes payable	568	787
Deferred revenue, current	7,425	10,077
Total current liabilities	54,396	48,817
Other long-term liabilities	3,241	12,342
Total liabilities	57,637	61,159
Commitments and contingencies (Note 14)	0	0
Shareholders' equity:
Preference shares, $0.00045 par value per share, 20,000,000 shares authorized and no shares issued and outstanding at January 31, 2017 and January 31, 2016, respectively	0	0
Ordinary shares, $0.00045 par value per share, 200,000,000 shares authorized at January 31, 2017 and January 31, 2016, respectively; 33,369,032 shares issued and outstanding at January 31, 2017; 32,333,359 shares issued and outstanding at January 31, 2016	15	15
Additional paid-in capital	212,276	176,306
Accumulated other comprehensive loss	(70)	(7)
Retained earnings	242,413	173,142
Total shareholders’ equity	454,634	349,456
Total liabilities and shareholders' equity	$ 512,271	$ 410,615