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Stockholders' Equity/(Deficit) (Tables)

12 Months Ended

Dec. 31, 2014

Equity [Abstract]

Stock Options Valuation Assumptions

The assumptions used in the Black-Scholes model were as follows for stock options granted in the years ended December 31, 2014, 2013 and 2012:

		2014		2013		2012
Risk-free interest rate		2.1-2.7%		.41-1.28%		.39-.67%
Expected volatility of common stock		63.5-65.0%		59.2-68.2%		65.3-71.6%
Dividend yield		0%		0%		0%
Expected life of options		6.1-8.2 years		3.0-4.1 years		3.0-4.1 years

Summary of Stock Option Activity

Additional information with respect to both plans stock option activity is as follows:

		Number of Shares				Weighted Average Exercise Price
Outstanding at December 31, 2011			3,399,405			$	3.78
Granted			771,969			$	2.85
Exercised			(15,150	)		$	2.61
Cancelled			(736,070	)		$	4.42
Outstanding at December 31, 2012			3,420,154			$	3.31
Granted			1,233,822			$	2.99
Exercised			(204,500	)		$	2.24
Cancelled			(1,453,600	)		$	3.61
Outstanding at December 31, 2013			2,995,876			$	3.31
Granted			1,026,286			$	2.14
Exercised			—			$	—
Cancelled			(328,676	)		$	3.48
Outstanding at December 31, 2014			3,693,486			$	2.67
Options exercisable at December 31, 2012			2,754,227			$	3.44
Options exercisable at December 31, 2013			2,118,903			$	2.94
Options exercisable at December 31, 2014			2,653,302			$	2.77

Stock Options Outstanding

The following table summarizes information about stock options outstanding at December 31, 2014:

Stock Options Outstanding

Range of Exercise Prices				Number of Shares Outstanding				Weighted Average Remaining Contractual Life in Years				Weighted Average Exercise Price
$	1.07 - $2.20				1,071,360				8.64			$	2.13
$	2.73 - $2.89				2,262,126				2.15			$	2.80
$	3.25 - $3.90				360,000				3.02			$	3.42
					3,693,486				4.12			$	2.67

Estimated Fair Value of Restricted Stock Award

A summary of the status of the restricted stock awards as of December 31, 2014 and changes during the year ended December 31, 2014 is presented as follows:

		Number of Shares				Weighted Average Grant Date Fair Value
Unvested at December 31, 2013			188,125			$	2.89
Granted			1,076,813			$	1.43
Vested			(419,722	)		$	2.17
Cancelled			(7,000	)		$	2.00
Unvested at December 31, 2014			838,216			$	1.38

Summary of Common Stock Warrants Outstanding

The following table summarizes our common stock warrants outstanding at December 31, 2014:

Common Stock Warrants				Exercise Price				Termination Date
	1,562,500			$	3.60				11/9/2016

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Disclosure of the number and weighted-average grant date fair value for restricted stock and restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock and restricted stock units that were granted, vested, or forfeited during the year.

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Tabular disclosure of option exercise prices, by grouped ranges, including the upper and lower limits of the price range, the number of shares under option, weighted average exercise price and remaining contractual option terms.

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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 warrants or rights issued. Warrants and rights outstanding are derivative securities that give the holder the right to purchase securities (usually equity) from the issuer at a specific price within a certain time frame. Warrants are often included in a new debt issue to entice investors by a higher return potential. The main difference between warrants and call options is that warrants are issued and guaranteed by the company, whereas options are exchange instruments and are not issued by the company. Also, the lifetime of a warrant is often measured in years, while the lifetime of a typical option is measured in months. Disclose the title of issue of securities called for by warrants and rights outstanding, the aggregate amount of securities called for by warrants and rights outstanding, the date from which the warrants or rights are exercisable, and the price at which the warrant or right is exercisable.

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