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Share-Based Compensation (Tables)

9 Months Ended

Sep. 30, 2013

Share-Based Compensation

Schedule of the compensation cost charged against income for plans

		Three Months Ended						Nine Months Ended
		September 30,						September 30,
		2013			2012			2013			2012
Selling, general & administrative expense		$	199,967		$	182,286		$	707,453		$	679,340

Schedule of stock option activity under all plans

		Shares Under Options		Weighted Average Exercise Price			Aggregate Intrinsic Value
Outstanding at December 31, 2012		493,888		$	5.47
Granted		97,362		19.74
Exercised		(117,500	)	2.85
Cancelled or expired		—		—
Outstanding at September 30, 2013		473,750		$	9.05		$	6,498,890
Options exercisable at September 30, 2013		367,500		$	6.31		$	6,048,878
Vested and expected to vest at September 30, 2013		473,750		$	9.05		$	6,498,890

Schedule of assumptions used to determine the fair value of options using Black Scholes option pricing model

Expected volatility	34.0% - 50.0%
Expected dividends	none
Risk free interest rate	0.4% - 0.7%
Expected term	3.3 to 5.0 years

Summary of Restricted Stock Units ( RSUs ) activity

		Restricted Stock Units		Weighted Average Award Date Fair Value
Unvested at December 31, 2012		108,866		$	8.77
Awarded		10,600		19.97
Shares vested		(61,635	)	6.67
Forfeited / cancelled		(6,931	)	13.23
Unvested at September 30, 2013		50,900		$	11.64

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Tabular disclosure of the allocation of equity-based compensation costs to a given line item on the balance sheet and income statement for the period. This may include the reporting line for the costs and the amount capitalized and expensed.

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Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for share options (or share units) that were outstanding at the beginning and end of the year, vested and expected to vest, exercisable or convertible at the end of the year, and the number of share options or share units that were granted, exercised or converted, forfeited, and expired during the year.

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Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions.

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Tabular disclosure of the change in restricted stock units (RSUs).

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