Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Current Assets:
Accounts receivable, allowances	$ 208	$ 189
Stockholders' Equity
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	30,000,000	10,000,000
Common stock, shares issued (in shares)	5,446,840	5,409,550
Common stock, shares outstanding (in shares)	5,308,973	5,272,204
Treasury stock, (in shares)	81,584	81,584