Earnings per share ("EPS") (Tables)

9 Months Ended

Sep. 30, 2018

Earnings Per Share [Abstract]

Schedule of Reconciliation of Weighted Average Shares Used in Diluted EPS

The following is a reconciliation of the weighted average shares used in diluted EPS computations.

	Three Months Ended September 30,				Nine Months Ended September 30,
	2018		2017		2018		2017
Weighted average common shares-basic		18,562,204		18,180,845		18,460,848		18,071,093
Effect of dilutive securities
Unexercised stock options and stock purchase plan		—		249,667		312,320		164,716
Unvested restricted stock awards and units		—		142,279		91,001		158,733
Weighted average common shares-diluted		18,562,204		18,572,791		18,864,169		18,394,542