CONDENSED CONSOLIDATED BALANCE SHEETS (Parentheticals) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Apr. 30, 2020	Jan. 31, 2019	Jan. 31, 2020
Current assets:
Allowance for doubtful accounts	$ 4,327		$ 2,515
Stockholders’ equity:
Treasury stock (in shares)	99,371		99,371
Average repurchase price of treasury stock shares (in dollars per share)	$ 13.27	$ 13.27
Class A Common Stock
Stockholders’ equity:
Common stock, par value (in dollars per share)	$ 0.001		$ 0.001
Common stock authorized (in shares)	1,000,000,000		1,000,000,000
Common stock issued (in shares)	50,358,480		48,512,090
Common stock outstanding (in shares)	50,358,480		48,512,090
Class B Common Stock
Stockholders’ equity:
Common stock, par value (in dollars per share)	$ 0.001		$ 0.001
Common stock authorized (in shares)	100,000,000		100,000,000
Common stock issued (in shares)	7,738,326		8,969,824
Common stock outstanding (in shares)	7,638,955		8,870,453