Consolidated Balance Sheets (Parenthetical) (USD $)	Dec. 31, 2012	Dec. 31, 2011
Stockholders' equity:
Preferred stock, par value	$ 0	$ 0
Preferred stock, authorized shares	5,000,000	5,000,000
Preferred stock, issued shares	20,625	20,625
Preferred stock, outstanding shares	20,625	20,625
Common stock, par value	$ 0	$ 0
Common stock, authorized shares	25,000,000	25,000,000
Common stock, issued shares	19,516,589	19,469,317
Common stock, outstanding shares	19,516,589	19,469,317