Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Jul. 31, 2016	Jan. 31, 2016
Current assets:
Cash and cash equivalents	$ 276,507	$ 268,056
Marketable securities	50,520	39,837
Accounts receivable, net	33,588	39,408
Inventories	20,898	18,167
Restricted cash	8	7
Prepaid expenses and other current assets	4,180	4,170
Total current assets	385,701	369,645
Property and equipment, net	3,642	3,448
Deferred tax assets, non-current	5,743	4,626
Intangible assets, net	4,173	4,178
Goodwill	26,601	26,601
Other non-current assets	1,998	2,117
Total assets	427,858	410,615
Current liabilities:
Accounts payable	19,723	14,175
Accrued liabilities	23,123	23,778
Income taxes payable	0	787
Deferred revenue	5,464	10,077
Total current liabilities	48,310	48,817
Other long-term liabilities	2,793	12,342
Total liabilities	51,103	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 July 31, 2016 and January 31, 2016, respectively	0	0
Ordinary shares, $0.00045 par value per share, 200,000,000 shares authorized at July 31, 2016 and January 31, 2016, respectively; 32,677,136 shares issued and outstanding at July 31, 2016; 32,333,359 shares issued and outstanding at January 31, 2016	15	15
Additional paid-in capital	181,690	176,306
Accumulated other comprehensive income (loss)	33	(7)
Retained earnings	195,017	173,142
Total shareholders’ equity	376,755	349,456
Total liabilities and shareholders' equity	$ 427,858	$ 410,615