Condensed Consolidated Balance Sheets (Unaudited) - USD ($)
$ in Thousands
Apr. 30, 2019
Jan. 31, 2019
Current assets:    
Cash and cash equivalents $ 204,444 $ 194,047
Marketable debt securities 161,732 164,861
Accounts receivable, net 26,457 26,212
Inventories 17,635 18,252
Restricted cash 11 11
Prepaid expenses and other current assets 5,025 6,206
Total current assets 415,304 409,589
Property and equipment, net 6,383 6,728
Deferred tax assets, non-current 10,566 10,587
Intangible assets, net 10,134 10,936
Operating lease right-of-use assets, net 7,911 0
Goodwill 26,601 26,601
Other non-current assets 2,352 2,412
Total assets 479,251 466,853
Current liabilities:    
Accounts payable 16,055 12,801
Accrued and other current liabilities 22,523 24,700
Operating lease liabilities, current 2,390 0
Income taxes payable 682 993
Deferred revenue, current 565 529
Total current liabilities 42,215 39,023
Operating lease liabilities, non-current 5,635 0
Other long-term liabilities 8,963 8,341
Total liabilities 56,813 47,364
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, 2019 and January 31, 2019, respectively 0 0
Ordinary shares, $0.00045 par value per share, 200,000,000 shares authorized at April 30, 2019 and January 31, 2019, respectively; 32,738,600 shares issued and outstanding at April 30, 2019; 32,303,540 shares issued and outstanding at January 31, 2019 15 15
Additional paid-in capital 208,522 188,516
Accumulated other comprehensive income 351 97
Retained earnings 213,550 230,861
Total shareholders’ equity 422,438 419,489
Total liabilities and shareholders' equity $ 479,251 $ 466,853