Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Oct. 31, 2017	Jan. 31, 2017
Current assets:
Cash and cash equivalents	$ 320,933	$ 322,872
Marketable securities	93,085	82,522
Accounts receivable, net	47,197	38,596
Inventories	21,097	20,145
Restricted cash	9	8
Prepaid expenses and other current assets	4,008	4,392
Total current assets	486,329	468,535
Property and equipment, net	5,666	4,988
Deferred tax assets, non-current	6,536	5,774
Intangible assets, net	15,241	4,149
Goodwill	26,601	26,601
Other non-current assets	2,214	2,224
Total assets	542,587	512,271
Current liabilities:
Accounts payable	26,208	19,955
Accrued and other current liabilities	26,578	26,448
Income taxes payable	2,447	568
Deferred revenue	5,219	7,425
Total current liabilities	60,452	54,396
Other long-term liabilities	13,071	3,241
Total liabilities	73,523	57,637
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 October 31, 2017 and January 31, 2017, respectively	0	0
Ordinary shares, $0.00045 par value per share, 200,000,000 shares authorized at October 31, 2017 and January 31, 2017, respectively; 33,296,091 shares issued and outstanding at October 31, 2017; 33,369,032 shares issued and outstanding at January 31, 2017	15	15
Additional paid-in capital	209,161	212,276
Accumulated other comprehensive loss	(116)	(70)
Retained earnings	260,004	242,413
Total shareholders’ equity	469,064	454,634
Total liabilities and shareholders' equity	$ 542,587	$ 512,271