Consolidated Balance Sheets (Parentheticals) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Accounts Receivable, Allowance for Credit Loss, Current	$ 58	$ 86
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)	5,454,639	5,434,521
Common Stock, Shares, Outstanding (in shares)	5,373,055	5,352,937
Treasury Stock, Common, Shares (in shares)	81,584	81,584