Equity (Details) (USD $)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Apr. 10, 2013	Dec. 31, 2012
Warrants [Abstract]
Warrants outstanding (in shares)	816,612
Weighted average exercise price (in dollars per share)	$ 8.41		$ 5
Weighted average remaining contractual life	1 year 6 months
Preferred Shares [Abstract]
Preferred shares, shares authorized (in shares)	1,000,000			1,000,000
Preferred shares, issued and outstanding (in shares)	0
Common Shares [Abstract]
Common shares, authorized (in shares)	75,000,000			75,000,000
Common shares, par value (in dollars per share)	$ 0			$ 0
Common shares, shares issued (in shares)	54,912,781			51,183,318
Common shares, shares outstanding (in shares)	52,551,813			49,383,209
Options exercised (in shares)	0
Stock-based compensation expense	$ 691,946	$ 473,434
Stock options granted (in shares)	1,090,000	105,000