Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Apr. 30, 2016	Jan. 31, 2016
Current assets:
Cash and cash equivalents	$ 267,959	$ 268,056
Marketable securities	55,852	39,837
Accounts receivable, net	30,501	39,408
Inventories	17,921	18,167
Restricted cash	8	7
Prepaid expenses and other current assets	3,845	4,170
Total current assets	376,086	369,645
Property and equipment, net	3,567	3,448
Deferred tax assets, non-current	6,541	4,626
Intangible assets, net	4,173	4,178
Goodwill	26,601	26,601
Other assets	2,085	2,117
Total assets	419,053	410,615
Current liabilities:
Accounts payable	16,347	14,175
Accrued liabilities	17,395	23,778
Income taxes payable	0	787
Deferred revenue, current	6,092	10,077
Total current liabilities	39,834	48,817
Other long-term liabilities	2,767	12,342
Total liabilities	42,601	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 April 30, 2016 and January 31, 2016, respectively	0	0
Ordinary shares, $0.00045 par value per share, 200,000,000 shares authorized at April 30, 2016 and January 31, 2016, respectively; 32,839,779 shares issued and outstanding at April 30, 2016; 32,333,359 shares issued and outstanding at January 31, 2016	15	15
Additional paid-in capital	190,031	176,306
Accumulated other comprehensive income (loss)	20	(7)
Retained earnings	186,386	173,142
Total shareholders’ equity	376,452	349,456
Total liabilities and shareholders' equity	$ 419,053	$ 410,615