Consolidated Balance Sheets (Parentheticals) - USD ($)	Jul. 31, 2021	Jan. 30, 2021
Class of Stock [Line Items]
Allowance For Doubtful Accounts Receivable Current	$ 742,000	$ 605,000
Preferred Stock Par Or Stated Value Per Share	$ 100
Preferred Stock Shares Authorized	100,000
Common Class B [Member]
Class of Stock [Line Items]
Common Stock Shares Authorized	15,000,000
Common Stock Shares Issued	1,763,652	1,763,652
Common Stock Par Or Stated Value Per Share	$ 0.033
Common Class A [Member]
Class of Stock [Line Items]
Common Stock Shares Authorized	50,000,000
Common Stock Shares Issued	20,776,585	20,839,795
Common Stock Par Or Stated Value Per Share	$ 0.033