Stock-Based Compensation (Details Textual)	1 Months Ended					3 Months Ended		6 Months Ended		12 Months Ended
	Jan. 31, 2017 $ / shares shares	Oct. 31, 2016 $ / shares shares	Dec. 31, 2015 shares	Feb. 23, 2015 $ / shares shares	Jan. 31, 2013 $ / shares shares	Dec. 31, 2016 USD ($) $ / shares shares	Dec. 31, 2015 USD ($)	Dec. 31, 2016 USD ($) $ / shares shares	Dec. 31, 2015 USD ($)	Jun. 30, 2016 USD ($) $ / shares shares	Jun. 30, 2015 $ / shares shares	Mar. 26, 2014 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation | $								$ 2,125,966	$ 1,965,993
Employee service share-based compensation, nonvested awards, total compensation cost not yet recognized, stock options | $						$ 14,133,769		14,133,769
Fair value of warrants | $								1,230		$ 11,955
Adjustments to Additional Paid in Capital, Warrant Issued | $								1,778,962		$ 5,523,706
Subsequent Event [Member] | Warrants Amendment [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares	$ 1.65
Class Of Warrant Or Right Exercise Date Of Warrants Or Rights	Jan. 30, 2020
Number Of Investors Elected To Amend Warrants	189
Class of Warrant or Right, Outstanding	15,400,000
2014 Stock and Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation arrangement by share-based payment award, number of shares authorized												3,750,000
Non Qualified Stock option plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation arrangement by share-based payment award, options, grants in period, gross		28,210,000
Share-based compensation arrangements by share-based payment award, options, grants in period, weighted average exercise price | $ / shares		$ 1.20
Share-based compensation arrangement by share-based payment award, number of shares authorized		35,000,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period		4,360,000
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights		The options vest monthly over 4 years, except for 12,190,000 of the options which do not begin to vest until specific events have occurred and then begin to vest monthly over 4 years.
Two Consultants
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation arrangement by share-based payment award, options, grants in period, gross											8,334
Share-based compensation arrangements by share-based payment award, options, grants in period, weighted average exercise price | $ / shares											$ 4.50
Employees and Directors | General and Administrative Expense [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation | $						792,137	$ 673,013	1,376,196	1,346,026
Employees and Directors | Research and Development Expense [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation | $						$ 444,801	$ 312,630	$ 749,770	$ 619,967
Employees and Directors | 2014 Stock and Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation arrangement by share-based payment award, options, grants in period, gross								90,000
Share based compensation arrangement by share based payment award options shares purchased vested monthly term				4 years
Employees and Directors | 2014 Stock and Incentive Plan | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation arrangements by share-based payment award, options, grants in period, weighted average exercise price | $ / shares										$ 1.29
Employees and Directors | 2014 Stock and Incentive Plan | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation arrangements by share-based payment award, options, grants in period, weighted average exercise price | $ / shares										$ 3.44
Employee Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation arrangement by share-based payment award, options, grants in period, gross								23,940,000		285,000
Share-based compensation arrangements by share-based payment award, options, grants in period, weighted average exercise price | $ / shares								$ 1.20		$ 1.07
Employee Stock Option | Employees and Directors
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation arrangement by share-based payment award, options, grants in period, gross				4,397,000	1,500,000					3,295,000
Share-based compensation arrangements by share-based payment award, options, grants in period, weighted average exercise price | $ / shares					$ 4.50
Share-based compensation arrangement by share-based payment award, number of shares authorized				6,850,000
Employee Stock Option | Employees and Directors | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation arrangements by share-based payment award, options, grants in period, weighted average exercise price | $ / shares				$ 1.00
Employee Stock Option | Employees and Directors | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation arrangements by share-based payment award, options, grants in period, weighted average exercise price | $ / shares				$ 2.06
Warrant
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Adjustments to Additional Paid in Capital, Warrant Issued | $								$ 516,550		$ 500,321
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Warrants cancelled In Period			30,000							30,000
Warrant One
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Class of warrant or right, number of securities called by warrants or rights										5,897,677
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares										$ 1.65
Class of warrant exercisable warrants or rights										5,897,677
Warrants to purchase common stock value | $										$ 3,497,914
Warrant Two
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Class of warrant or right, number of securities called by warrants or rights						536,150		536,150		3,043,669
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares						$ 1.65		$ 1.65		$ 1.65
Class of warrant exercisable warrants or rights										3,043,558
Warrants to purchase common stock value | $										$ 1,667,630
Adjustments to Additional Paid in Capital, Warrant Issued | $										$ 1,202,336
Warrant Three
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Class of warrant or right, number of securities called by warrants or rights										184,490
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares										$ 2.34
Class of warrant exercisable warrants or rights										184,490
Warrants to purchase common stock value | $										$ 184,673
Warrant Four
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Class of warrant or right, number of securities called by warrants or rights										327,046
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares										$ 1.32
Class of warrant exercisable warrants or rights										327,046
Warrants to purchase common stock value | $										$ 113,521
Warrant Five
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Class of warrant or right, number of securities called by warrants or rights										87,500
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares										$ 2.50
Class of warrant exercisable warrants or rights										87,500
Warrants to purchase common stock value | $										$ 65,490
Warrant Six
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Class of warrant or right, number of securities called by warrants or rights										519,093
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares										$ 1.65
Class of warrant exercisable warrants or rights										519,093
Warrants to purchase common stock value | $										$ 386,800
Warrant Seven
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Class of warrant or right, number of securities called by warrants or rights										9,000
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares										$ 1.38
Class of warrant exercisable warrants or rights										9,000
Warrants to purchase common stock value | $										$ 11,407
Warrant Eight
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Class of warrant or right, number of securities called by warrants or rights										24,000
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares										$ 1.34
Class of warrant exercisable warrants or rights										24,000
Warrants to purchase common stock value | $										$ 20,943
Warrant Nine
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Class of warrant or right, number of securities called by warrants or rights										60,000
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares										$ 1.85
Class of warrant exercisable warrants or rights										60,000
Warrants to purchase common stock value | $										$ 34,122
Warrant Ten
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Class of warrant or right, number of securities called by warrants or rights										10,000
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares										$ 0.96
Class of warrant exercisable warrants or rights										10,000
Warrants to purchase common stock value | $										$ 6,500
Warrant Eleven
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Class of warrant or right, number of securities called by warrants or rights						3,248,184		3,248,184
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares						$ 1.65		$ 1.65
Class of warrant exercisable warrants or rights						3,248,184		3,248,184
Warrants to purchase common stock value | $						$ 2,759,015		$ 2,759,015
Adjustments to Additional Paid in Capital, Warrant Issued | $								$ 1,262,413
Warrant Twelve
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Class of warrant or right, number of securities called by warrants or rights						536,150		536,150
Warrants to purchase common stock value | $						$ 516,550		$ 516,550
Warrant Thirteen
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Class of warrant exercisable warrants or rights						66,667		66,667
Adjustments to Additional Paid in Capital, Warrant Issued | $								$ 50,365