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Stock Compensation Plans - Stock Option Activity under Two Thousand Six And Two Thousand Sixteen Plan (Details) (Details)
$ / shares in Units, $ in Thousands
 12 Months Ended
Jan. 29, 2022
USD ($)
$ / shares
shares
Number of Shares  
Options exercised (521,643)
Employee Stock Plan, 2006 Plan and 2016 Plan  
Number of Shares  
Outstanding options at beginning of year 3,647,581
Options granted 1,518,154
Options canceled or expired (22,542)
Options exercised (521,643)
Outstanding options at end of year 4,621,550
Options exercisable at end of year 751,743
Vested and expected to vest at end of year 4,621,550
Weighted-average exercise price per option  
Outstanding options at beginning of year | $ / shares $ 1.09
Options granted | $ / shares 0.71
Options canceled or expired | $ / shares 4.19
Options exercised | $ / shares 1.49
Outstanding options at end of year | $ / shares 0.90
Options exercisable at end of year | $ / shares 2.42
Vested and expected to vest at end of year | $ / shares $ 0.90
Weighted-average remaining contractual term  
Outstanding options at end of year 8 years 2 months 12 days
Options exercisable at end of year 5 years 7 months 6 days
Vested and expected to vest at end of year 8 years 2 months 12 days
Aggregate Intrinsic Value  
Outstanding options at beginning of year | $ $ 811
Options exercised | $ 2,493
Outstanding options at end of year | $ 16,067
Options exercisable at end of year | $ 1,662
Vested and expected to vest at end of year | $ $ 16,067