Stock-Based Compensation - Summary of Options Award Activity (Details) - Option Awards	3 Months Ended
	Apr. 30, 2021 $ / shares shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of Shares, Unvested option awards at beginning of year | shares	85,000
Number of Shares, Granted | shares	0
Number of Shares, Vested | shares	(74,000)
Number of Shares, Forfeited | shares	0
Number of Shares, Unvested option awards at end of year | shares	11,000
Weighted Average Grant Date Fair Value, Unvested option awards at beginning of year | $ / shares	$ 8.73
Weighted Average Grant Date Fair Value, Granted | $ / shares	0
Weighted Average Grant Date Fair Value, Vested | $ / shares	8.49
Weighted Average Grant Date Fair Value, Forfeited | $ / shares	0
Weighted Average Grant Date Fair Value, Unvested option awards at end of year | $ / shares	$ 10.20