Condensed Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - USD ($) $ in Thousands	Jun. 30, 2026	Mar. 31, 2026
Allowances for bad debts and cash discounts	$ 624	$ 426
Common stock, par value (in dollars per share)	$ 1	$ 1
Common stock, shares authorized (in shares)	10,000,000	10,000,000
Common stock, shares issued (in shares)	9,124,805	9,019,505
Treasury stock, common shares (in shares)	1,912,014	1,907,323