Stock-Based Compensation Arrangements (Stock-Based Compensation) (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Share-based Compensation	$ 971,688	$ 892,087
Stock option grants beginning of period [Member]
Share-based Compensation	846,347	730,102
Stock option grants [Member]
Share-based Compensation	122,420	157,932
Employee Stock Purchase Plan [Member]
Share-based Compensation	2,921	4,053
Director agreements [Member]
Share-based Compensation	$ 0	$ 0