Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Apr. 30, 2021	Jan. 31, 2021
Current assets:
Cash and cash equivalents	$ 227,509	$ 241,274
Marketable debt securities	208,020	199,434
Accounts receivable, net	34,528	24,974
Inventories	33,120	26,081
Restricted cash	10	10
Prepaid expenses and other current assets	5,361	5,531
Total current assets	508,548	497,304
Property and equipment, net	6,308	5,530
Deferred tax assets, non-current	10,481	10,914
Intangible assets, net	17,291	18,703
Operating lease right-of-use assets, net	10,775	9,659
Goodwill	26,601	26,601
Other non-current assets	4,634	4,569
Total assets	584,638	573,280
Current liabilities:
Accounts payable	20,644	21,124
Accrued and other current liabilities	44,897	48,126
Operating lease liabilities, current	2,992	2,911
Income taxes payable	700	962
Deferred revenue, current	770	844
Total current liabilities	70,003	73,967
Operating lease liabilities, non-current	8,475	7,525
Other long-term liabilities	14,866	16,812
Total liabilities	93,344	98,304
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, 2021 and January 31, 2021, respectively	0	0
Ordinary shares, $0.00045 par value per share, 200,000,000 shares authorized at April 30, 2021 and January 31, 2021, respectively; 36,273,343 shares issued and outstanding at April 30, 2021; 35,547,440 shares issued and outstanding at January 31, 2021	16	16
Additional paid-in capital	375,021	347,458
Accumulated other comprehensive income	792	1,219
Retained earnings	115,465	126,283
Total shareholders’ equity	491,294	474,976
Total liabilities and shareholders' equity	$ 584,638	$ 573,280