Stockholders' Equity (Narrative) (Details)					1 Months Ended		3 Months Ended	9 Months Ended
	Sep. 29, 2016 USD ($) $ / shares shares	May 24, 2016 shares	Jun. 10, 2014 shares	Jun. 05, 2013 shares	Sep. 30, 2016 USD ($) $ / shares shares	May 31, 2014 USD ($)	Sep. 30, 2016 USD ($) $ / shares shares	Sep. 30, 2016 USD ($) $ / shares item shares	Dec. 31, 2015 $ / shares
Shareholders' Equity and Share-based Payments [Line Items]
Votes per share | item								1
Dividends declared					$ 0		$ 0	$ 0
Dividends paid								$ 0
Proceeds from preferred stock and warrants issued, gross	$ 24,000,000
Preferred stock, shares issued | shares	24,000
Preferred stock, par value | $ / shares					$ 0.001		$ 0.001	$ 0.001	$ 0.001
Common stock issuable from warrants | shares	36,923,078
Proceeds from preferred stocks and warrants, net	$ 23,200,000
Preferred stock dividend rate								6.00%
Preferred Stock, Liquidation Preference, Value					$ 1,000		$ 1,000	$ 1,000
Preferred stock, conversion price | $ / shares					$ 0.65		$ 0.65	$ 0.65
Preferred stock redemption, triggering event, Percent of common stock sold threshold								50.00%
Preferred stock, Accretion of dicount								$ 6,100,000
Exercise price of warrants | $ / shares	$ 0.70
Warrant term								180 days
Increase in number of shares authorized for issuance under the Plan | shares		1,500,000	1,000,000	1,000,000
Total compensation cost not yet recognized					$ 1,700,000		$ 1,700,000	$ 1,700,000
Estimated forfeitures								$ 800,000
Weighted average amortization period of total compensation cost not yet recognized								4 years
Remaining shares available for issuance | shares					1,477,178		1,477,178	1,477,178
Sales Agreement [Member]
Shareholders' Equity and Share-based Payments [Line Items]
Aggregate gross sales price						$ 18,000,000
Commission percentage of gross proceeds						3.00%
Gross proceeds from common stock sold							$ 0
Remaining common stock available					$ 13,800,000		$ 13,800,000	$ 13,800,000
Warrants [Member]
Shareholders' Equity and Share-based Payments [Line Items]
Exercise price of warrants | $ / shares					$ 0.84		$ 0.84	$ 0.84
Number of common shares exercised upon conversion of warrants | shares								267,256
Gross proceeds from stock warrants exercised								$ 293,982
Healthcare Royalty Partners Debt [Member]
Shareholders' Equity and Share-based Payments [Line Items]
Payments of debt					$ 13,000,000