Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Current Assets:
Accounts receivable, allowances	$ 29	$ 31
Stockholders’ Equity
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	10,000,000	10,000,000
Common stock, shares issued (in shares)	2,757,050	2,757,050
Common stock, shares outstanding (in shares)	2,675,466	2,675,466
Treasury stock, (in shares)	81,584	81,584