Stockholders' Equity (Tables)

3 Months Ended

Mar. 31, 2013

Stockholders' Equity [Abstract]

Weighted average for key assumptions used in determining the fair value of options granted

The weighted average for key assumptions used in determining the fair value of options granted during the three months ended March 31, 2013 follows:

Expected price volatility	80.63	%
Risk-free interest rate	0.81	%
Weighted average expected life in years	6 years
Dividend yield	—

Summary of stock option activity

Option activity during the three months ended March 31, 2013 was as follows:

	Number of Shares			Weighted Average Exercise Price Per Share		Aggregate Intrinsic Value
Outstanding at January 1, 2013		4,279,919		$	3.70
Granted in 2013:
Officers and Directors		—			—
Others		116,242			4.41
Exercised		—			—
Forfeitures		(183,431	)		2.50
Outstanding at March 31, 2013		4,212,730		$	3.77	$	3,958,862

Summary of stock options outstanding

Options outstanding at March 31, 2013 are as follows:

Range of Exercise Prices	Number Outstanding		Weighted Average Remaining Contractual Life (Years)		Weighted Average Exercise Price		Aggregate Intrinsic Value
$ 1.00 – 5.00		3,306,230		5.93	$	3.08
$ 5.01 – 10.00		906,500		4.42	$	6.30
		4,212,730					$	3,958,862

Summary of stock options exercisable

Options exercisable at March 31, 2013 are as follows:

Range of Exercise Prices	Number Exercisable		Weighted Average Remaining Contractual Life (Years)		Weighted Average Exercise Price		Aggregate Intrinsic Value
$ 1.00 – 5.00		2,700,716		5.25	$	3.03
$ 5.01 – 10.00		906,500		4.42	$	6.30
		3,607,216					$	3,314,340

Summary of non-vested stock options

A summary of the status of the Company’s non-vested stock options as of January 1, 2013, and changes during the three months ended March 31, 2013 is summarized as follows:

Nonvested Shares	Shares			Weighted Average Grant Date Fair Value		Aggregate Intrinsic Value
Nonvested at January 1, 2013		854,640
Granted		116,242
Vested		(211,087	)
Forfeited		(154,281	)
Nonvested at March 31, 2013		605,514		$	2.21	$	644,522

Summary of warrants outstanding to purchase Common Stock

Warrants outstanding at March 31, 2013, all of which are exercisable are as follows:

Range of Exercise Prices	Number Outstanding		Weighted Average Remaining Contractual Life (Years)		Weighted Average Exercise Price		Aggregate Intrinsic Value
$ 0.01 – 5.00		2,009,436		1.65	$	3.88	$	1,308,616