Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Current Assets:
Accounts receivable, allowances	$ 86	$ 77
Stockholders' Equity
Common stock, par value (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)	5,434,521	5,446,840
Common stock, shares outstanding (in shares)	5,352,937	5,308,973
Treasury stock, (in shares)	81,584	81,584