Stock-Based Compensation (Tables)

3 Months Ended

Mar. 31, 2014

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 March 31, 2014 and changes during the period then ended are presented in the following table:

Options

	Number of Options		Weighted Average Exercise Price		Weighted Average Remaining Contractual Life (in years)		Aggregate Intrinsic Value (in thousands)
Outstanding as of December 31, 2013		3,291,738	$	2.11		6.13	$	738
Granted		225,000		1.21		—		—
Exercised		—		—		—		—
Forfeited or expired		(62,500)		2.25		—		—
Outstanding as of March 31, 2014		3,454,238		2.05		5.99		258
Exercisable as of March 31, 2014		3,024,237	$	2.12		5.53	$	258

Schedule of Nonvested Restricted Stock Units Activity [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, 2013		—	$	—		—
Granted		95,000		1.21		1.46
Vested (1)		(12,500)		1.21		0.75
Unvested balance as of March 31, 2014		82,500	$	1.21		1.46

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(1) Vested shares included 12,500 shares of restricted common stock issued in 2014 for which final vesting is subject to the approval of Company’s compensation committee.

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

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 three-month periods ended March 31, 2014 and 2013.

	Three-Month Periods Ended March 31,
	2014						2013
Range of values:	Low			High			Low			High
Expected volatility		73.03	%		74.03	%		75.02	%		76.49	%
Expected dividends		—			—			—			—
Expected term (in years)		3.73			9.11			3.73			9.47	%
Risk free rate		1.16	%		2.52	%		0.55	%		1.91	%