Stock Options (Tables)

6 Months Ended

Jun. 30, 2014

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block]

Following is a summary of the amount included as stock-based compensation expense in the accompanying consolidated statements of operations and comprehensive loss:

	Three Months Ended				Six Months Ended
	June 30, 2014		June 30, 2013		June 30, 2014		June 30, 2013
Stock options:
General and administrative expense	$	195,000	$	733,000	$	390,000	$	845,000
Research and development expense		40,000		70,000		78,000		113,000
Total stock-based compensation expense	$	235,000	$	803,000	$	468,000	$	958,000

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

The following table summarizes Option activity:

	Shares		Weighted Average Exercise Price		Average Remaining Contractual Term (Years)		Intrinsic Value
Outstanding at December 31, 2013		25,721,000	$	0.20		9.15	$	6,451,441
Granted		—		—
Exercised		—		—
Forfeited		—		—
Expired		2,000		13.10
Outstanding at June 30, 2014		25,719,000	$	0.19		8.63	$	6,442,700
Exercisable at June 30, 2014		11,651,493	$	0.19		8.65	$	3,017,673

Schedule of Common Stock, Capital Shares Reserved for Future Issuance [Table Text Block]

As of June 30, 2014, the Company had reserved shares of its common stock for future issuance as follows:

	Shares Reserved
Stock options outstanding		25,719,000
Available for future grants under the 2013 Stock Incentive Plan		40,000,000
Warrants		38,890,451
Total Shares reserved		104,609,451