Stock-Based Compensation - Schedule of Stock Options Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	6 Months Ended	12 Months Ended
	Jul. 31, 2019	Jan. 31, 2019
Schedule of stock options activity
Outstanding Option Beginning Balance	566,260
Granted	0
Exercised	(5,150)
Cancelled	0
Outstanding Option Ending Balance	561,110	566,260
Exercisable	399,905	264,244
Expected to vest	160,025
Weighted Average Exercise Price per Option, Beginning Balance	$ 28.43
Granted, Weighted Average Exercise Price per Option	0
Exercised. Weighted Average Exercise Price per Option	30.36
Cancelled, Weighted Average Exercise Price per Option	0
Weighted Average Exercise Price per Option, Ending Balance	28.41	$ 28.43
Exercisable, Weighted Average Exercise Price per Option	30.45
Expected to vest, Weighted Average Exercise Price per Option	23.35
Option Price Per Share, Exercised	$ 30.36
Options outstanding, Weighted Average Remaining Contractual Term (years)	5 years 8 months 12 days	6 years 2 months 12 days
Exercisable, Weighted Average Remaining Contractual Term (years)	4 years 10 months 24 days
Expected to vest, Weighted Average Remaining Contractual Term (years)	7 years 8 months 12 days
Options outstanding, Aggregate Intrinsic Value	$ 480	$ 2,654
Exercisable, Aggregate Intrinsic Value	0
Expected to vest, Aggregate Intrinsic Value	$ 477
Minimum
Schedule of stock options activity
Option Price Per Share, Beginning Balance	$ 23.35
Option Price Per Share, Ending Balance	23.35	$ 23.35
Maximum
Schedule of stock options activity
Option Price Per Share, Beginning Balance	42.12
Option Price Per Share, Ending Balance	$ 42.12	$ 42.12