Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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Aggregate proceeds received by the entity during the annual period from exercises of stock or unit options and conversion of similar instruments granted under equity-based payment arrangements.

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Unrecognized cost of unvested share-based compensation awards.

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Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Disclosure of the aggregate tax benefit realized from the exercise of stock options and the conversion of similar instruments during the annual period.

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Number of share options (or share units) exercised during the current period.

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Stock options, restricted stock and performance stock options (Details 2) - Stock options - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Share-based compensation
Unrecognized compensation cost	$ 1,708,000		$ 1,708,000
Weighted-average remaining contractual life			8 years 9 months 18 days
Shares issued upon the exercise of outstanding stock options			4,443
Proceeds received upon the exercise of outstanding stock options			$ 4,000
Tax benefit from the exercise of stock options			0
Selling, general and administrative expense
Share-based compensation
Total compensation cost	$ 115,000	$ 21,000	$ 189,000	$ 32,000