Equity (Details) (USD $)	3 Months Ended	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2011
Warrants [Abstract]
Warrants outstanding (in shares)	636,613	636,613
Weighted average exercise price (in dollars per share)	$ 9.12	$ 9.12
Weighted average remaining contractual life		1 year 2 months 8 days
Preferred Shares [Abstract]
Preferred shares, shares authorized (in shares)	1,000,000	1,000,000		1,000,000
Preferred shares, issued and outstanding (in shares)	0	0
Common Shares [Abstract]
Common shares, shares authorized (in shares)	75,000,000	75,000,000		75,000,000
Common shares, par value (in dollars per share)	$ 0	$ 0		$ 0
Common shares, shares issued (in shares)	50,790,391	50,790,391		50,321,962
Common shares, shares outstanding (in shares)	49,504,217	49,504,217		49,035,788
Options exercised (in shares)	0	0
Warrants exercised (in shares)	0	0
Stock-based compensation expense		$ 929,257	$ 846,273
Stock options granted (in shares)		130,000	96,593