Consolidated Balance Sheets - USD ($) $ in Thousands	Jan. 31, 2020	Jan. 31, 2019
Current assets:
Cash and cash equivalents	$ 231,403	$ 194,047
Marketable debt securities	173,345	164,861
Accounts receivable, net	18,487	26,212
Inventories	22,971	18,252
Restricted cash	9	11
Prepaid expenses and other current assets	4,975	6,206
Total current assets	451,190	409,589
Property and equipment, net	5,614	6,728
Deferred tax assets, non-current	10,400	10,587
Intangible assets, net	17,826	10,936
Operating lease right-of-use assets, net	9,935	0
Goodwill	26,601	26,601
Other non-current assets	5,710	2,412
Total assets	527,276	466,853
Current liabilities:
Accounts payable	14,910	12,801
Accrued and other current liabilities	34,970	24,700
Operating lease liabilities, current	2,181	0
Income taxes payable	691	993
Deferred revenue, current	701	529
Total current liabilities	53,453	39,023
Operating lease liabilities, non-current	7,975	0
Other long-term liabilities	17,776	8,341
Total liabilities	79,204	47,364
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, 2020 and January 31, 2019, respectively	0	0
Ordinary shares, $0.00045 par value per share, 200,000,000 shares authorized at January 31, 2020 and January 31, 2019, respectively; 33,805,609 shares issued and outstanding at January 31, 2020; 32,303,540 shares issued and outstanding at January 31, 2019	15	15
Additional paid-in capital	261,220	188,516
Accumulated other comprehensive income	768	97
Retained earnings	186,069	230,861
Total shareholders’ equity	448,072	419,489
Total liabilities and shareholders' equity	$ 527,276	$ 466,853