Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - USD ($) $ in Thousands	Jun. 30, 2024	Mar. 31, 2024
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	$ 11,893	$ 11,687
Unamortized Debt Issuance Expense	$ 369	$ 438
Common Stock, Par or Stated Value Per Share (in dollars per share)	$ 0.01	$ 0.01
Common Stock, Shares Authorized (in shares)	30,000,000	30,000,000
Common Stock, Shares, Issued (in shares)	9,374,130	9,374,130
Common Stock, Shares, Outstanding (in shares)	4,084,615	4,084,615
Treasury Stock, shares (in shares)	5,289,515	5,289,515