Earnings per share (Tables)

6 Months Ended

Jun. 30, 2014

Earnings Per Share [Abstract]

Schedule of Reconciliation of Weighted Average Shares Used in Calculation of Basic and Diluted Earnings Per Share

The following is a reconciliation of the weighted average shares used in the basic and diluted net income (loss) per common share computations.

	Three Months Ended June 30,				Six Months Ended June 30,
	2014		2013		2014		2013
Weighted average common shares-basic		18,445,348		19,140,520		18,322,185		19,285,004
Effect of dilutive securities:
Unexercised stock options net of treasury share repurchase		175,844		129,524		112,943		198,711
Weighted average common shares-diluted		18,621,192		19,270,044		18,435,128		19,483,715