Earnings per share (Tables)

12 Months Ended

Dec. 31, 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.

	Year Ended December 31,
	2014		2013		2012
Weighted average common shares-basic		18,459,054		18,697,228		18,977,263
Effect of diluted securities:
Unexercised stock options net of treasury share    repurchase		—		—		413,150
Weighted average common shares-diluted		18,459,054		18,697,228		19,390,413