Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Apr. 30, 2020	Jan. 31, 2020
Current assets:
Cash and cash equivalents	$ 236,585	$ 231,403
Marketable debt securities	174,742	173,345
Accounts receivable, net	20,684	18,487
Inventories	21,957	22,971
Restricted cash	9	9
Prepaid expenses and other current assets	4,789	4,975
Total current assets	458,766	451,190
Property and equipment, net	5,401	5,614
Deferred tax assets, non-current	9,943	10,400
Intangible assets, net	16,391	17,826
Operating lease right-of-use assets, net	9,272	9,935
Goodwill	26,601	26,601
Other non-current assets	5,359	5,710
Total assets	531,733	527,276
Current liabilities:
Accounts payable	20,589	14,910
Accrued and other current liabilities	27,262	34,970
Operating lease liabilities, current	2,101	2,181
Income taxes payable	749	691
Deferred revenue, current	802	701
Total current liabilities	51,503	53,453
Operating lease liabilities, non-current	7,386	7,975
Other long-term liabilities	17,261	17,776
Total liabilities	76,150	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 April 30, 2020 and January 31, 2020, respectively	0	0
Ordinary shares, $0.00045 par value per share, 200,000,000 shares authorized at April 30, 2020 and January 31, 2020, respectively; 34,342,097 shares issued and outstanding at April 30, 2020; 33,805,609 shares issued and outstanding at January 31, 2020	15	15
Additional paid-in capital	284,557	261,220
Accumulated other comprehensive income	405	768
Retained earnings	170,606	186,069
Total shareholders’ equity	455,583	448,072
Total liabilities and shareholders' equity	$ 531,733	$ 527,276