Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Jul. 31, 2018	Jan. 31, 2018
Current assets:
Cash and cash equivalents	$ 295,289	$ 346,672
Marketable securities	80,671	87,919
Accounts receivable, net	29,007	31,294
Inventories	30,787	23,383
Restricted cash	9	9
Prepaid expenses and other current assets	2,686	4,006
Total current assets	438,449	493,283
Property and equipment, net	7,010	6,449
Deferred tax assets, non-current	3,760	3,642
Intangible assets, net	12,366	14,417
Goodwill	26,601	26,601
Other non-current assets	2,536	2,257
Total assets	490,722	546,649
Current liabilities:
Accounts payable	23,381	19,815
Accrued and other current liabilities	23,090	32,178
Income taxes payable	524	936
Deferred revenue, current	583	307
Total current liabilities	47,578	53,236
Other long-term liabilities	10,252	11,226
Total liabilities	57,830	64,462
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, 2018 and January 31, 2018, respectively	0	0
Ordinary shares, $0.00045 par value per share, 200,000,000 shares authorized at July 31, 2018 and January 31, 2018, respectively; 32,650,237 shares issued and outstanding at July 31, 2018; 33,489,614 shares issued and outstanding at January 31, 2018	15	15
Additional paid-in capital	188,663	221,186
Accumulated other comprehensive loss	(211)	(279)
Retained earnings	244,425	261,265
Total shareholders’ equity	432,892	482,187
Total liabilities and shareholders' equity	$ 490,722	$ 546,649