Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Oct. 31, 2018	Jan. 31, 2018
Current assets:
Cash and cash equivalents	$ 212,338	$ 346,672
Marketable securities	136,279	87,919
Accounts receivable, net	32,417	31,294
Inventories	23,328	23,383
Restricted cash	11	9
Prepaid expenses and other current assets	3,309	4,006
Total current assets	407,682	493,283
Property and equipment, net	6,746	6,449
Deferred tax assets, non-current	3,927	3,642
Intangible assets, net	11,222	14,417
Goodwill	26,601	26,601
Other non-current assets	2,470	2,257
Total assets	458,648	546,649
Current liabilities:
Accounts payable	11,134	19,815
Accrued and other current liabilities	25,615	32,178
Income taxes payable	755	936
Deferred revenue, current	405	307
Total current liabilities	37,909	53,236
Other long-term liabilities	9,600	11,226
Total liabilities	47,509	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 October 31, 2018 and January 31, 2018, respectively	0	0
Ordinary shares, $0.00045 par value per share, 200,000,000 shares authorized at October 31, 2018 and January 31, 2018, respectively; 32,149,520 shares issued and outstanding at October 31, 2018; 33,489,614 shares issued and outstanding at January 31, 2018	14	15
Additional paid-in capital	175,906	221,186
Accumulated other comprehensive loss	(185)	(279)
Retained earnings	235,404	261,265
Total shareholders’ equity	411,139	482,187
Total liabilities and shareholders' equity	$ 458,648	$ 546,649