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Stock-Based Compensation - Narrative (Details) - USD ($)
$ in Millions
1 Months Ended 12 Months Ended
Apr. 30, 2021
Apr. 30, 2020
Apr. 30, 2019
Dec. 31, 2018
May 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Unrecognized stock-based compensation expense       $ 12.1  
Weighted average period for recognition of outstanding awards (in years)       1 year 11 months  
Restricted Stock          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Award vesting period (in years)       3 years  
Restricted Stock Units (RSUs)          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Award vesting period (in years)       3 years  
Performance-based RSUs          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Performance measurement period (in years)       3 years  
Performance-based RSUs | Scenario, Forecast          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Grants in future periods (in Shares) 51,507 48,531 121,736    
2017 Incentive Compensation Plan | Common Stock          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Shares authorized under stock-based compensation plan (in shares)         1,000,000
2016 Plan | Restricted Stock Units (RSUs)          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Requisite service period (in years)       5 years