Stock Options and Equity-Classified Warrants (Details) - USD ($)				12 Months Ended
	Feb. 29, 2016	Dec. 20, 2013	Dec. 10, 2013	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2016	Jun. 02, 2015	Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options outstanding (in shares)								2,095,000
Share-based compensation arrangement by share-based payment award, fair value assumptions and methodology [Abstract]
Vesting period				3 years
Average vesting period				6 years
Number of Options (Employees and Non-Employees) [Abstract]
Exercised (in shares)				56,358
Weighted-Average Exercise Price Options [Abstract]
Exercised (in dollars per share)		$ 4.66	$ 2.39
Issuance of stock options to certain consultants in exchange for services				$ 77,967	$ 61,480
Employees [Member]
Share-based compensation arrangement by share-based payment award, fair value assumptions and methodology [Abstract]
Estimated annualized forfeiture rate				10.00%	10.00%	10.00%
Employees [Member] | Maximum [Member]
Share-based compensation arrangement by share-based payment award, fair value assumptions and methodology [Abstract]
Expected lives				10 years
Non-employees [Member]
Share-based compensation arrangement by share-based payment award, fair value assumptions and methodology [Abstract]
Unrecognized compensation expense related to unvested stock options, granted							$ 0
Weighted-Average Exercise Price Options [Abstract]
Issuance of stock options to certain consultants in exchange for services				$ 0	$ 0	$ 1,276,000
Senior Management [Member]
Share-based compensation arrangement by share-based payment award, fair value assumptions and methodology [Abstract]
Estimated annualized forfeiture rate				2.00%	2.00%	2.00%
Employees and Directors [Member]
Share-based compensation arrangement by share-based payment award, fair value assumptions and methodology [Abstract]
Unrecognized compensation expense related to unvested stock options, granted							$ 4,100,000
Unrecognized compensation cost, recognized as expense over a weighted-average period				1 year 2 months 26 days
Directors [Member]
Share-based compensation arrangement by share-based payment award, fair value assumptions and methodology [Abstract]
Estimated annualized forfeiture rate				0.00%	0.00%	0.00%
Stock Options [Member] | Employees [Member]
Share-based compensation arrangement by share-based payment award, fair value assumptions and methodology [Abstract]
Share based compensation arrangement by share-based payment award fair value assumptions method used				Black-Scholes option-pricing model
Expected dividend yield				0.00%	0.00%	0.00%
Stock Options [Member] | Employees [Member] | Minimum [Member]
Share-based compensation arrangement by share-based payment award, fair value assumptions and methodology [Abstract]
Risk-free interest rate				1.20%	1.74%	1.74%
Expected volatility				74.00%	74.00%	82.00%
Expected lives				6 years	6 years	6 years
Stock Options [Member] | Employees [Member] | Maximum [Member]
Share-based compensation arrangement by share-based payment award, fair value assumptions and methodology [Abstract]
Risk-free interest rate				2.26%	2.42%	2.12%
Expected volatility				88.00%	85.00%	90.00%
Expected lives				10 years	10 years	10 years
Stock Options [Member] | Non-employees [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options outstanding (in shares)				635,714	635,714	167,143	600,000		692,143
Share-based compensation arrangement by share-based payment award, fair value assumptions and methodology [Abstract]
Share based compensation arrangement by share-based payment award fair value assumptions method used					Black-Scholes option-pricing model
Risk-free interest rate				0.00%	0.00%	2.23%
Expected volatility				0.00%	0.00%	85.00%
Expected lives				0 years	0 years	10 years
Expected dividend yield				0.00%	0.00%	0.00%
Number of Options (Employees and Non-Employees) [Abstract]
Outstanding - beginning of year (in shares)				635,714	692,143	167,143
Granted (in shares)				0	0	550,000
Exercised (in shares)				0	0	0
Expired/Forfeited (in shares)				(35,714)	(56,429)	(25,000)
Outstanding - end of year (in shares)				600,000	635,714	692,143
Exercisable at end of year (in shares)				600,000	635,714	692,143
Weighted average fair value of stock options granted during the year (in dollars per share)				$ 0	$ 0	$ 1.98
Weighted-Average Exercise Price Options [Abstract]
Outstanding - beginning of year (in dollars per share)				3.02	3.47	5.69
Granted (in dollars per share)				0	0	2.76
Exercised (in dollars per share)				0	0	0
Expired/Forfeited (in dollars per share)				7.77	8.54	2.79
Outstanding - end of year (in dollars per share)				2.73	3.02	3.47
Exercisable at end of year (in dollars per share)				$ 2.73	$ 3.02	$ 3.47
Stock Options [Member] | Employees and Directors [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options outstanding (in shares)				13,583,862	13,583,862	6,228,593	16,879,770		9,358,592
Number of Options (Employees and Non-Employees) [Abstract]
Outstanding - beginning of year (in shares)				13,583,862	9,358,592	6,228,593
Granted (in shares)				4,857,500	4,590,000	3,190,000
Exercised (in shares)				(330,000)	(287,143)	(1,667)
Expired/Forfeited (in shares)				(1,176,737)	0	(24,333)
Exercised, forfeited or expired (in shares)				(54,855)	(77,587)	(34,001)
Outstanding - end of year (in shares)				16,879,770	13,583,862	9,358,592
Exercisable at end of year (in shares)				10,867,920	8,020,162	4,901,511
Weighted average fair value of stock options granted during the year (in dollars per share)				$ 0.43	$ 1.88	$ 1.80
Weighted-Average Exercise Price Options [Abstract]
Outstanding - beginning of year (in dollars per share)				3.11	2.83	3.11
Granted (in dollars per share)				0.59	2.61	2.47
Exercised (in dollars per share)				2.14	2.05	1.83
Expired/Forfeited (in dollars per share)				3.49	0	2.81
Expired (in dollars per share)				8.03	5.58	8.18
Outstanding - end of year (in dollars per share)				2.36	3.11	2.83
Exercisable at end of year (in dollars per share)				$ 2.95	$ 3.45	$ 3.22
Warrants [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options outstanding (in shares)				7,225,472	7,349,760	7,349,760	32,502,790		7,349,760
Number of Options (Employees and Non-Employees) [Abstract]
Outstanding - beginning of year (in shares)				7,225,472	7,349,760	8,324,609
Granted (in shares)				31,705,575	0	25,000
Exercised (in shares)				(56,358)	(10,000)	(340,527)
Expired/Forfeited (in shares)				0	0	0
Exercised, forfeited or expired (in shares)				(6,371,899)	(114,288)	(659,322)
Outstanding - end of year (in shares)				32,502,790	7,225,472	7,349,760
Exercisable at end of year (in shares)				30,190,290	7,225,472	7,149,760
Weighted average fair value of stock options granted during the year (in dollars per share)				$ 0.26	$ 0	$ 3.46
Weighted-Average Exercise Price Options [Abstract]
Outstanding - beginning of year (in dollars per share)				4.28	4.27	4.86
Granted (in dollars per share)				0.62	0	5.60
Exercised (in dollars per share)				0.70	2.50	2.56
Expired/Forfeited (in dollars per share)				0	0	0
Expired (in dollars per share)				4.48	3.82	12.66
Outstanding - end of year (in dollars per share)				0.68	4.28	4.27
Exercisable at end of year (in dollars per share)				$ 0.67	$ 4.28	$ 4.32
Issuance of stock options to certain consultants in exchange for services	$ 157,797
Restricted Stock [Member]
Share-based compensation arrangement by share-based payment award, fair value assumptions and methodology [Abstract]
Share based compensation arranged by share based payment award restricted stock granted (in shares)					0
Restricted Stock [Member] | Chief Executive Officer [Member]
Share-based compensation arrangement by share-based payment award, fair value assumptions and methodology [Abstract]
Vesting period				3 years
Share based compensation arranged by share based payment award restricted stock granted (in shares)				2,325,581
Share based compensation of fair value of the restricted stock on the grant				$ 1,000,000
2000 Long Term Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock reserved for future issuance (in shares)							1,400,000
Expiration date				Aug. 06, 2010
Share-based compensation, shares available for future grant (in shares)							0
Options outstanding (in shares)				500,000			500,000
Number of Options (Employees and Non-Employees) [Abstract]
Outstanding - end of year (in shares)				500,000
2008 Stock Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock reserved for future issuance (in shares)							30,000,000
Share-based compensation, shares available for future grant (in shares)							12,000,000
Options outstanding (in shares)				17,100,000			17,100,000
Number of Options (Employees and Non-Employees) [Abstract]
Granted (in shares)						100,000
Outstanding - end of year (in shares)				17,100,000
2008 Stock Incentive Plan [Member] | Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation, outstanding stock options (in shares)							2,300,000
2008 Stock Incentive Plan [Member] | Restricted Stock [Member] | Senior Management [Member]
Weighted-Average Exercise Price Options [Abstract]
Value of restricted shares issued									$ 626,900