Stock-Based Compensation - Narrative (Details) $ in Millions	3 Months Ended
Apr. 30, 2022 USD ($) shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total unrecognized stock-based compensation expense related to unvested stock options and restricted stock grants \| $	$ 5.7
Weighted average recognition period	3 years
Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expiration period	10 years
Vesting period	4 years
Stock options \| Share-based Payment Arrangement, Tranche One
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage	25.00%
Stock options \| Share-based Payment Arrangement, Tranche Two
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage	25.00%
Stock options \| Share-based Payment Arrangement, Tranche Three
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage	25.00%
Stock options \| Share-based Payment Arrangement, Tranche Four
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage	25.00%
Directors \| Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage Of Awards Vesting On Grant Date	50.00%
Vesting period	2 years
Certain Employees \| Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage Of Awards Vesting On Grant Date	25.00%
Vesting period	4 years
2012 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common shares authorized (in shares)	6,613,900
Shares available for issuance (in shares)	1,797,665

Percentage Of Awards Vesting On Grant Date

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Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

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Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

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Percentage of vesting of award under share-based payment arrangement.

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Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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