Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Jul. 31, 2017	Jan. 31, 2017
Current assets:
Cash and cash equivalents	$ 309,738	$ 322,872
Marketable securities	91,077	82,522
Accounts receivable, net	38,351	38,596
Inventories	17,726	20,145
Restricted cash	9	8
Prepaid expenses and other current assets	2,810	4,392
Total current assets	459,711	468,535
Property and equipment, net	5,636	4,988
Deferred tax assets, non-current	6,299	5,774
Intangible assets, net	12,970	4,149
Goodwill	26,601	26,601
Other non-current assets	2,229	2,224
Total assets	513,446	512,271
Current liabilities:
Accounts payable	23,466	19,955
Accrued and other current liabilities	19,906	26,448
Income taxes payable	2,014	568
Deferred revenue	6,203	7,425
Total current liabilities	51,589	54,396
Other long-term liabilities	9,131	3,241
Total liabilities	60,720	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 July 31, 2017 and January 31, 2017, respectively	0	0
Ordinary shares, $0.00045 par value per share, 200,000,000 shares authorized at July 31, 2017 and January 31, 2017, respectively; 33,220,378 shares issued and outstanding at July 31, 2017; 33,369,032 shares issued and outstanding at January 31, 2017	15	15
Additional paid-in capital	204,513	212,276
Accumulated other comprehensive loss	(82)	(70)
Retained earnings	248,280	242,413
Total shareholders’ equity	452,726	454,634
Total liabilities and shareholders' equity	$ 513,446	$ 512,271