Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Oct. 31, 2020	Jan. 31, 2020
Current assets:
Cash and cash equivalents	$ 225,508	$ 231,403
Marketable debt securities	198,129	173,345
Accounts receivable, net	24,111	18,487
Inventories	23,712	22,971
Restricted cash	10	9
Prepaid expenses and other current assets	4,777	4,975
Total current assets	476,247	451,190
Property and equipment, net	5,131	5,614
Deferred tax assets, non-current	10,463	10,400
Intangible assets, net	17,352	17,826
Operating lease right-of-use assets, net	8,734	9,935
Goodwill	26,601	26,601
Other non-current assets	5,027	5,710
Total assets	549,555	527,276
Current liabilities:
Accounts payable	14,613	14,910
Accrued and other current liabilities	41,922	34,970
Operating lease liabilities, current	2,809	2,181
Income taxes payable	1,711	691
Deferred revenue, current	1,178	701
Total current liabilities	62,233	53,453
Operating lease liabilities, non-current	6,662	7,975
Other long-term liabilities	18,007	17,776
Total liabilities	86,902	79,204
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 October 31, 2020 and January 31, 2020, respectively	0	0
Ordinary shares, $0.00045 par value per share, 200,000,000 shares authorized at October 31, 2020 and January 31, 2020, respectively; 35,072,089 shares issued and outstanding at October 31, 2020; 33,805,609 shares issued and outstanding at January 31, 2020	16	15
Additional paid-in capital	322,502	261,220
Accumulated other comprehensive income	1,363	768
Retained earnings	138,772	186,069
Total shareholders’ equity	462,653	448,072
Total liabilities and shareholders' equity	$ 549,555	$ 527,276