CONSOLIDATED BALANCE SHEETS (Parentheticals) (USD $) In Thousands, except Share data, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Allowance for doubtful accounts	$ 100	$ 100
Common stock, par value	$ 0.0033	$ 0.0033
Common stock, shares authorized	10,000,000	10,000,000
Common stock, shares issued	7,192,479	7,192,479
Common stock, shares outstanding	6,944,267	6,944,267
Treasury stock, shares	248,212	248,212