Consolidated Balance Sheets (unaudited) (Parenthetical) (USD $)	Jun. 30, 2012	Dec. 31, 2011
Stockholders' equity:
Series A Preferred stock, par value (in dollars per share)	$ 0.5	$ 0.5
Series A Preferred stock, authorized (in shares)	700,000	700,000
Series A Preferred stock, outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, authorized (in shares)	10,000,000	10,000,000
Common stock, issued (in shares)	6,554,743	6,530,743
Treasury stock, shares (in shares)	223,191	194,604