CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $)	Dec. 31, 2014	Dec. 31, 2013
Preferred stock, no par value (in dollars per share)	$ 0	$ 0
Preferred stock, shares authorized	5,000,000	5,000,000
Common stock, no par value (in dollars per share)	$ 0	$ 0
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	59,293,428	57,369,683
Common stock, shares outstanding	59,293,428	57,369,683
Series A convertible preferred stock
Preferred stock, shares authorized	25,000	25,000
Preferred stock, shares issued	18,158	18,158
Preferred stock shares surrendered	18,158	18,158
Preferred stock, shares outstanding	0	0