Stock-Based Compensation Arrangements (Stock-Based Compensation) (Detail) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Share-based Compensation	$ 252,554	$ 109,642	$ 651,789	$ 354,441
Stock option grants beginning of period [Member]
Share-based Compensation	251,374	108,363	491,197	348,545
Stock option grants [Member]
Share-based Compensation	92	0	157,463	1,166
Employee Stock Purchase Plan [Member]
Share-based Compensation	$ 1,088	$ 1,279	$ 3,129	$ 4,730