Basis of Presentation (Tables)

6 Months Ended

Jun. 30, 2017

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Dilutive and Antidilutive Options

The dilutive and antidilutive options are shown separately in the table below.

	Three Months Ended June 30				Six Months Ended June 30
	2017		2016		2017		2016
Additional shares		933,300		704,800		1,013,700
Antidilutive options		616,800		1,934,300		649,300		2,597,600