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Stock-Based Compensation - Summary of Stock Awards Activity (Details) - Stock Award Units - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 12 Months Ended
Apr. 30, 2020
Jan. 31, 2020
Number of Stock Award Units    
Stock Award Units, Beginning Balance 490,239  
Units granted 86,500  
Units vested (141,235)  
Units forfeited (3,409)  
Stock Award Units, Ending Balance 432,095 490,239
Weighted Average Grant Date Fair Value    
Weighted Average Grant Date Fair Value, Beginning Balance $ 33.50  
Units granted, Weighted Average Grant Date Fair Value 10.00  
Units vested, Weighted Average Grant Date Fair Value 26.88  
Units forfeited, Weighted Average Grant Date Fair Value 25.75  
Weighted Average Grant Date Fair Value Ending Balance $ 31.02 $ 33.50
Weighted-Average Remaining Contractual Term (years)    
Units outstanding, Weighted-Average Remaining Contractual Term (years) 1 year 3 months 18 days 1 year 4 months 24 days
Aggregate Intrinsic Value    
Units outstanding, Aggregate Intrinsic Value $ 4,455 $ 8,442