Consolidated Statements of Shareholders' Equity - USD ($)
$ in Thousands
Total
Outstanding Ordinary Shares [Member]
Additional Paid-in Capital [Member]
Accumulated Other Comprehensive Income (Loss) [Member]
Retained Earnings [Member]
Beginning Balance, Amount at Jan. 31, 2019 $ 419,489 $ 15 $ 188,516 $ 97 $ 230,861
Beginning Balance, Shares at Jan. 31, 2019   32,303,540      
Exercise of stock options, Amount $ 5,695 $ 0 5,695 0 0
Exercise of stock options, Shares 366,886 366,886      
Vesting of restricted stock units, Amount $ 0 $ 0 0 0 0
Vesting of restricted stock units, Shares   957,319      
Employee stock purchase plan, Amount 5,967 $ 0 5,967 0 0
Employee stock purchase plan, Shares   177,864      
Stock-based compensation expense related to stock awards granted to employees and consultants 61,042 $ 0 61,042 0 0
Other comprehensive income (loss) - net of tax 671 0 0 671 0
Net loss (44,792) 0 0 0 (44,792)
Ending Balance, Amount at Jan. 31, 2020 448,072 $ 15 261,220 768 186,069
Ending Balance, Shares at Jan. 31, 2020   33,805,609      
Exercise of stock options, Amount $ 10,333 $ 0 10,333 0 0
Exercise of stock options, Shares 421,736 421,736      
Vesting of restricted stock units, Amount $ 5,351 $ 1 5,350 0 0
Vesting of restricted stock units, Shares   1,162,883      
Employee stock purchase plan, Amount 5,825 $ 0 5,825 0 0
Employee stock purchase plan, Shares   182,931      
Stock repurchase, Amount (1,000) $ 0 (1,000) 0 0
Stock repurchase, Shares   (25,719)      
Stock-based compensation expense related to stock awards granted to employees and consultants 65,730 $ 0 65,730 0 0
Other comprehensive income (loss) - net of tax 451 0 0 451 0
Net loss (59,786) 0 0 0 (59,786)
Ending Balance, Amount at Jan. 31, 2021 $ 474,976 $ 16 347,458 1,219 126,283
Ending Balance, Shares at Jan. 31, 2021 35,547,440 35,547,440      
Exercise of stock options, Amount $ 7,603 $ 0 7,603 0 0
Exercise of stock options, Shares 269,287 269,287      
Vesting of restricted stock units, Amount $ 4,592 $ 1 4,591 0 0
Vesting of restricted stock units, Shares   1,367,309      
Employee stock purchase plan, Amount 7,208 $ 0 7,208 0 0
Employee stock purchase plan, Shares   118,782      
Fair value of partially vested equity awards assumed in connection with acquisition 407 $ 0 407 0 0
Stock-based compensation expense related to stock awards granted to employees and consultants 80,020 0 80,020 0 0
Other comprehensive income (loss) - net of tax (1,219) 0 0 (1,219) 0
Net loss (26,411) 0 0 $ 0 (26,411)
Ending Balance, Amount at Jan. 31, 2022 $ 547,176 $ 17 $ 447,287   $ 99,872
Ending Balance, Shares at Jan. 31, 2022 37,302,818 37,302,818