Stock-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2013

Disclosure Of Compensation Related Costs, Share-Based Payments [Abstract]

Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]

A summary of all current and expired plans as of June 30, 2013 and changes during the period then ended consisted of the following:

	Number of Shares		Weighted Average Exercise Price		Weighted Average Remaining Contractual Life (in years)		Aggregate Intrinsic Value (in thousands)
Outstanding as of December 31, 2012		2,956,738	$	2.13		6.13	$	2,293
Granted		360,000		1.93		—		—
Exercised		—		—		—		—
Forfeited or expired		—		—		—		—
Outstanding as of June 30, 2013		3,316,738		2.11		5.90		2,090
Exercisable as of June 30, 2013		2,619,239	$	2.19		5.10	$	2,002

Schedule of Nonvested Restricted Stock Units Activity [Table Text Block]

Recognition and Measurement

The fair value of each stock-based award to employees and non-employee directors is estimated on the measurement date which generally is the grant date while awards to non-employees are measured at the earlier of the performance commitment date or the service completion date using the Black-Scholes-Merton option-pricing model. Option valuation models require the input of highly subjective assumptions, and changes in assumptions used can materially affect the fair value estimates. The Company estimates the expected life of the award by taking into consideration the vesting period, contractual term, historical exercise data, expected volatility, blackout periods and other relevant factors. Volatility is estimated by evaluating the Company’s historical volatility data. The risk-free interest rate on the measurement date is based on U.S. Treasury constant maturity rates for a period approximating the expected life of the award. The Company historically has not paid dividends and it does not expect to pay dividends in the foreseeable future and, therefore, the expected dividend rate is zero.

Restricted Stock

	Number of shares		Weighted Average Fair Value at Grant Date		Weighted Average Remaining Contractual Life (in years)
Unvested balance as of December 31, 2012		—	$	—		—
Granted		50,000		1.97		0.5
Vested (1)		(25,000)		1.97		0.5
Unvested balance as of June 30, 2013		25,000	$	1.97		0.5

(1) Vested shares included 25,000 shares of restricted common stock issued in 2013 for which final vesting is subject to the approval by Company’s compensation committee.

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

Restricted Stock

	Number of shares		Weighted Average Fair Value at Grant Date		Weighted Average Remaining Contractual Life (in years)
Unvested balance as of December 31, 2012		—	$	—		—
Granted		50,000		1.97		0.5
Vested (1)		(25,000)		1.97		0.5
Unvested balance as of June 30, 2013		25,000	$	1.97		0.5

(1) Vested shares included 25,000 shares of restricted common stock issued in 2013 for which final vesting is subject to the approval by Company’s compensation committee.

The following table summarizes the range of assumptions utilized in the Black-Scholes-Merton option-pricing model for the valuation of stock options granted during the six-month periods ended June 30, 2013 and 2012.

	Six-Month Periods Ended June 30,
	2013						2012
Range of values:	Low			High			Low			High
Expected volatility		73.78	%		76.49	%		90.32	%		127.83	%
Expected dividends		—			—			—			—
Expected term (in years)		3.73			9.70			3.73			9.02
Risk free rate		0.55	%		2.45	%		0.63	%		1.95	%