Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - USD ($) shares in Thousands, $ in Thousands	Apr. 30, 2023	Jan. 31, 2023
Allowance for doubtful accounts	$ 676	$ 612
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, authorized (in shares)	50,000	50,000
Common stock, issued (in shares)	8,004	8,004
Common stock, outstanding (in shares)	8,004	8,004
Treasury stock (in shares)	3	3