Stock-Based Compensation Arrangements (Stock-Based Compensation) (Detail) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Share-based Compensation	$ 215,258	$ 252,925	$ 429,528	$ 399,235
Stock option grants beginning of period [Member]
Share-based Compensation	214,647	141,383	424,987	239,823
Stock option grants [Member]
Share-based Compensation	0	110,323	3,367	157,371
Employee Stock Purchase Plan [Member]
Share-based Compensation	$ 611	$ 1,219	$ 1,174	$ 2,041