Consolidated Balance Sheets - USD ($) $ in Thousands	Jan. 31, 2021	Jan. 31, 2020
Current assets:
Cash and cash equivalents	$ 241,274	$ 231,403
Marketable debt securities	199,434	173,345
Accounts receivable, net	24,974	18,487
Inventories	26,081	22,971
Restricted cash	10	9
Prepaid expenses and other current assets	5,531	4,975
Total current assets	497,304	451,190
Property and equipment, net	5,530	5,614
Deferred tax assets, non-current	10,914	10,400
Intangible assets, net	18,703	17,826
Operating lease right-of-use assets, net	9,659	9,935
Goodwill	26,601	26,601
Other non-current assets	4,569	5,710
Total assets	573,280	527,276
Current liabilities:
Accounts payable	21,124	14,910
Accrued and other current liabilities	48,126	34,970
Operating lease liabilities, current	2,911	2,181
Income taxes payable	962	691
Deferred revenue, current	844	701
Total current liabilities	73,967	53,453
Operating lease liabilities, non-current	7,525	7,975
Other long-term liabilities	16,812	17,776
Total liabilities	98,304	79,204
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 January 31, 2021 and January 31, 2020, respectively	0	0
Ordinary shares, $0.00045 par value per share, 200,000,000 shares authorized at January 31, 2021 and January 31, 2020, respectively; 35,547,440 shares issued and outstanding at January 31, 2021; 33,805,609 shares issued and outstanding at January 31, 2020	16	15
Additional paid-in capital	347,458	261,220
Accumulated other comprehensive income	1,219	768
Retained earnings	126,283	186,069
Total shareholders’ equity	474,976	448,072
Total liabilities and shareholders' equity	$ 573,280	$ 527,276