Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation (Narrative) (Details)

Stock-Based Compensation (Narrative) (Details) (USD $)	3 Months Ended		9 Months Ended
Stock-Based Compensation (Narrative) (Details) (USD $)	Sep. 30, 2014 plan	Sep. 30, 2013	Sep. 30, 2014 plan	Sep. 30, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of stock based compensation plans	3		3
Stock compensation expense	$ (527,690)	$ 771,590	$ 1,032,244	$ 2,193,715
Stock Incentive 1996 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total number of shares authorized	1,500,000.0		1,500,000.0
The 2002 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total number of shares authorized	12,000,000		12,000,000
The 2014 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total number of shares authorized	5,000,000		5,000,000
The 1996 , 2002 and 2014 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based compensation, outstanding stock options' expiration period			10 years
Stock based compensation, outstanding stock options' expiration period upon optionee's separation from employment			90 days
The 1996 , 2002 and 2014 Plan \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based compensation, granted stock options' vesting period			1 year
The 1996 , 2002 and 2014 Plan \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based compensation, granted stock options' vesting period			4 years