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Stockholders' Equity (Narrative) (Details)	1 Months Ended		12 Months Ended
Stockholders' Equity (Narrative) (Details)	Jun. 30, 2014 shares	May. 31, 2014 USD ($)	Dec. 31, 2015 USD ($) $ / shares item shares	Dec. 31, 2014 USD ($) shares	Dec. 31, 2009 USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Votes per share \| item			1
Dividends declared			$ 0
Dividends paid			$ 0
Share price \| $ / shares			$ 0.74
Gross proceeds from common stock sold			$ 941,354	$ 2,853,673
Exercise price of warrants \| $ / shares			$ 4.82
Warrants outstanding \| shares			2,120,365	2,197,883
Weighted average remaining contractual life			8 years
Options and stock appreciation rights outstanding \| shares			706,494	487,146
Options and stock appreciation rights vested and exercisable \| shares			235,572
Options and stock appreciation rights weighted average exercise price \| $ / shares			$ 22.43
Options and stock appreciation rights weighted average remaining term			6 years 5 months 1 day
Options and stock appreciation rights intrinsic value			$ 0
Options and stock appreciation rights exercised \| shares				0
Proceeds from options and stock appreciation rights exercised			$ 0	$ 0
Weighted average grant date fair value of options and stock appreciation rights granted \| $ / shares			$ 2.07
Adjustment for forfeiture rate			$ (200,000)
Total compensation cost not yet recognized			2,100,000
Estimated forfeitures			$ 800,000
Weighted average amortization period of total compensation cost not yet recognized			2 years
2012 Stock Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options expiration term			10 years
Exercise price as percentage of fair value			100.00%
2009 Employee Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Increase in number of shares authorized for issuance under the Plan \| shares	250,000
Eligible employees new purchase period			3 months
Percentage of compensation eligible employees can use to purchase common stock, maximum					15.00%
Compensation amount eligible employees can use to purchase common stock, maximum					$ 25,000
Percentage of fair value eligible employees can purchase common stock					95.00%
Shares available under ESPP \| shares			231,298
September 9, 2015 Warrants Offering [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Warrants Offering commencement date			Sep. 09, 2015
Number of common shares exercised upon conversion of warrants \| shares			267,256
Exercise price of warrants \| $ / shares			$ 1.10
Warrants outstanding \| shares			5,755,775
Number of common shares to purchase per subscription warrant \| shares			0.25
Gross proceeds from stock warrants exercised			$ 293,982
Sales Agreement [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate gross sales price		$ 18,000,000
Commission percentage of gross proceeds		3.00%
Aggregate shares of common stock sold \| shares			542,996
Share price \| $ / shares			$ 1.98
Gross proceeds from common stock sold			$ 1,072,743
Net proceeds from common stock sold			1,040,561
Remaining common stock available			$ 13,800,000
Director [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options expiration term			10 years
Exercise price as percentage of fair value			100.00%
Director [Member] \| Initial Grant [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options vesting period			2 years
Director [Member] \| Annual Grants [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options vesting period			1 year
Incentive Stock Options [Member] \| 2012 Stock Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options vesting period			3 years
Incentive Stock Options [Member] \| First Anniversary [Member] \| 2012 Stock Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options vesting percentage			25.00%
Incentive Stock Options [Member] \| Subsequent Monthly Vesting [Member] \| 2012 Stock Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options vesting percentage			2.0833%
Stock Option, Appreciation Rights And Warrants [Member] \| 2012 Stock Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options expiration term			10 years
Options vesting period			3 years
Stock Option, Appreciation Rights And Warrants [Member] \| First Anniversary [Member] \| 2012 Stock Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options vesting percentage			25.00%
Stock Option, Appreciation Rights And Warrants [Member] \| Subsequent Monthly Vesting [Member] \| 2012 Stock Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options vesting percentage			2.0833%
Time Based Restricted Shares [Member] \| 2012 Stock Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options vesting period			3 years
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted shares outstanding \| shares			0
Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share price \| $ / shares			$ 0.74
Options vesting period			4 years
Restricted shares granted \| shares			391,200
Restricted shares outstanding \| shares			752,008	697,751
Intrinsic value of restricted awards outstanding			$ 600,000
Intrinsic value of restricted awards vested			$ 400,000