Stockholders' Equity (Details Textual) - USD ($)									1 Months Ended		2 Months Ended	3 Months Ended	12 Months Ended
	Mar. 24, 2017	Feb. 22, 2017	Dec. 31, 2016	Sep. 13, 2016	Jun. 27, 2016	May 19, 2016	Jul. 14, 2015	May 08, 2015	Jul. 31, 2016	Jul. 31, 2015	Jun. 30, 2016	Dec. 31, 2015	Dec. 31, 2016	Dec. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock, shares authorized			200,000,000									200,000,000	200,000,000	200,000,000
Common stock, shares issued			25,304,270									12,547,684	25,304,270	12,547,684
Common stock, shares outstanding			25,304,270									12,547,684	25,304,270	12,547,684
Preferred stock, shares authorized			10,000,000									10,000,000	10,000,000	10,000,000
Preferred stock, shares issued			0									0	0	0
Preferred stock, shares outstanding			0									0	0	0
Proceeds from issuance of common stock, net of issuance costs													$ 4,405,973	$ 17,366,620
Proceeds from issuance of private placement net					$ 9,500,000								9,460,749	0
Convertible preferred stock, beneficial conversion feature recognized as deemed dividend									$ 332,550
Proceeds from issuance of units under initial public offering gross								$ 17,100,000
Proceeds from issuance of units under initial public offering net								$ 12,100,000
Stock and warrants issued during period shares initial public offering purchase price per unit								$ 6.00
Share-based compensation, tax benefit from compensation expense													0
Employee service share-based compensation, non-vested awards, compensation cost not yet recognized, total			$ 2,200,000										$ 2,200,000
Employee service share-based compensation, non-vested awards, compensation cost not yet recognized, period for recognition													1 year 2 months 1 day
Share-based compensation arrangement by share-based payment award, options, vested in period, fair value													$ 1,088,978	$ 1,140,079
Share-based compensation arrangement by share-based payment award, options, grants in period, gross													1,463,650	1,961,637
Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation arrangement by share-based payment award, equity instruments other than options, grants in period												75,000
Share-based compensation arrangement by share-based payment award, equity instruments other than options, grants in period, weighted average grant date fair value												$ 1.70	$ 1.70
Share-based compensation arrangement by share-based payment award, equity instruments other than options, non-vested, outstanding			18,750										18,750
Share-based compensation arrangement by share-based payment award, equity instruments other than options, vested in period													16,666
Share-based compensation arrangement by share-based payment award, equity instruments other than options, forfeited in period													39,584
2015 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation arrangement by share-based payment award, number of shares authorized			1,355,000										1,355,000
Share-based compensation arrangement by share-based payment award, description													the number of shares that have been authorized for issuance under the 2015 Plan will be automatically increased on the first day of each fiscal year beginning on January 1, 2016 and ending on (and including) January 1, 2025, in an amount equal to the lesser of (1) 4% of the outstanding shares of common stock on the last day of the immediately preceding fiscal year, or (2) another lesser amount determined by the Company’s Board of Directors.
Share-based compensation arrangement by share-based payment award, number of shares available for grant			669,651										669,651
Share-based compensation arrangement by share-based payment award, common stock percentage													4.00%
Demand Notes Payable [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Debt conversion, converted instrument, amount								$ 2,100,000
May 2016 Warrant [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Class of warrant or right, exercise price of warrants or rights						$ 1.3125
Warrant expiration period						5 years
Expiration date of warrants issued													May 18, 2021
June 2016 Warrant [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Class of warrant or right, exercise price of warrants or rights					$ 1.3125
Warrant expiration period					5 years
Expiration date of warrants issued													May 18, 2021
Common Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Conversion of stock, shares issued									2,309,428
Stock and warrants issued in conjunction with initial public offering								2,850,000
Warrants issued during period on exercise of over allotment option shares								422,500
Proceeds from issuance of warrants								$ 4,225
Underwriting discounts commissions and offering expenses								$ 2,900,000
Convertible preferred stock, shares issued upon conversion								7,374,852				7,374,852		7,374,852
Common Stock [Member] | Merck GHI [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock issued during period, shares, new issues							1,136,364			1,136,364
Proceeds from issuance of common stock, net of issuance costs							$ 5,000,000
Non-voting Convertible Preferred Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Conversion of stock, shares converted									2,309,428
At the Market Offering [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock issued during period, value, new issues													$ 4,405,973
At the Market Offering [Member] | Common Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock issued during period, value, new issues													$ 36,199
Stock issued during period, shares, new issues													3,619,863
Private Placement [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock issued during period, value, new issues													$ 9,460,749
Class of warrant or right, number of securities called by each warrant or right					0.75
Class of warrant or right, number of securities called by warrants or rights					6,790,169						6,790,169
Class of warrant or right, exercise price of warrants or rights					$ 1.14						$ 1.14
Sale of stock, description of transaction													(i) one share of common stock and a detachable stock purchase warrant to purchase an additional 0.75 shares of common stock, or (ii) one share of non-voting convertible preferred stock and a detachable stock purchase warrant to purchase an additional 0.75 shares of common stock, at a price of $1.14 per unit.
Proceeds from issuance of private placement net											$ 9,500,000
Private Placement [Member] | Common Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock issued during period, value, new issues													$ 67,441
Stock issued during period, shares, new issues					6,744,127						6,744,127		6,744,127
Private Placement [Member] | Non-voting Convertible Preferred Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock issued during period, shares, new issues					2,309,428						2,309,428
IPO [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock issued during period, value, new issues														$ 12,129,133
Debt conversion, converted instrument, shares issued								350,000
Debt conversion, converted instrument, amount													$ 0	2,100,000
IPO [Member] | Common Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock issued during period, value, new issues														$ 25,000
Stock issued during period, shares, new issues														2,500,000
Over-Allotment Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Class of warrant or right, number of securities called by warrants or rights								3,272,500
Class of warrant or right, exercise price of warrants or rights								$ 6.60
Warrant expiration period								5 years
Expiration date of warrants issued													May 08, 2020
Over-Allotment Option [Member] | Common Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Class of warrant or right, number of securities called by warrants or rights								185,250
Scenario, Plan [Member] | Cowen and Company, LLC [Member] | At the Market Offering [Member] | Sales Agreement [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock issued during period, value, new issues				$ 11,500,000
Proceeds from issuance of common stock, net of issuance costs			$ 4,400,000										$ 4,400,000
Gross proceeds from sale of common stock			4,700,000										4,700,000
Maximum commission percentage on gross proceeds				3.00%
Remaining availability under at the market offering			$ 6,800,000										$ 6,800,000
Scenario, Plan [Member] | Cowen and Company, LLC [Member] | At the Market Offering [Member] | Sales Agreement [Member] | Common Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock issued during period, shares, new issues			3,600,000										3,600,000
Scenario, Plan [Member] | Maximum [Member] | Cowen and Company, LLC [Member] | At the Market Offering [Member] | Sales Agreement [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate gross proceeds from issuance of common stock				$ 25,000,000
Subsequent Event [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		723,300
Share based compensation arrangements by share based payment award options grants in period exercise price		$ 1.03
Subsequent Event [Member] | Scenario, Plan [Member] | Cowen and Company, LLC [Member] | At the Market Offering [Member] | Sales Agreement [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Proceeds from issuance of common stock, net of issuance costs	$ 2,100,000
Gross proceeds from sale of common stock	2,200,000
Remaining availability under at the market offering	$ 4,600,000
Subsequent Event [Member] | Scenario, Plan [Member] | Cowen and Company, LLC [Member] | At the Market Offering [Member] | Sales Agreement [Member] | Common Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock issued during period, shares, new issues	2,100,000