Share-Based Payment Arrangements (Details 6) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense	$ 1,466,183	$ 1,705,429	$ 4,614,769
Share-based awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense	1,173	37,379	27,487
Non-qualified stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense	1,173	37,379	13,999
Restricted stock awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense	$ 0	$ 0	$ 13,488