Condensed Consolidated Statements of Stockholders' Equity (Deficit) - USD ($)		Total	Public Offering [Member]	At the Market Offering [Member]	Common Stock [Member]		Common Stock [Member] Public Offering [Member]		Common Stock [Member] At the Market Offering [Member]		Additional Paid-in Capital [Member]	Additional Paid-in Capital [Member] Public Offering [Member]	Additional Paid-in Capital [Member] At the Market Offering [Member]	Accumulated Other Comprehensive Loss [Member]	Accumulated Deficit [Member]
Balance at Dec. 31, 2017		$ 1,400,997			$ 1,133	[1]					$ 150,136,191			$ (25,900)	$ (148,710,427)
Balance (in shares) at Dec. 31, 2017	[1]				113,266
Issuance of units, net of offering costs			$ 10,721,400				$ 1,510	[1]				$ 10,719,890
Issuance of units, net of offering costs (in shares)	[1]						150,962
Issuance of RSUs					$ 3	[1]					(3)
Issuance of RSUs (in shares)	[1]				270
Stock compensation expense		238,190									238,190
Stock/Share cancellation (in shares)	[1]				(2)
Foreign currency translation		(12,579)												(12,579)
Net loss		(3,048,084)													(3,048,084)
Balance at Mar. 31, 2018		9,299,924			$ 2,646	[1]					161,094,268			(38,479)	(151,758,511)
Balance (in shares) at Mar. 31, 2018	[1]				264,496
Balance at Dec. 31, 2017		1,400,997			$ 1,133	[1]					150,136,191			(25,900)	(148,710,427)
Balance (in shares) at Dec. 31, 2017	[1]				113,266
Net loss		(9,635,722)
Balance at Sep. 30, 2018		4,029,551			$ 3,214	[1]					162,391,324			(18,838)	(158,346,149)
Balance (in shares) at Sep. 30, 2018	[1]				321,274
Balance at Dec. 31, 2017		1,400,997			$ 1,133	[1]					150,136,191			(25,900)	(148,710,427)
Balance (in shares) at Dec. 31, 2017	[1]				113,266
Balance at Dec. 31, 2018		3,308,741			$ 4,323	[1]					165,396,036			(13,093)	(162,078,525)
Balance (in shares) at Dec. 31, 2018	[1]				432,286
Balance at Mar. 31, 2018		9,299,924			$ 2,646	[1]					161,094,268			(38,479)	(151,758,511)
Balance (in shares) at Mar. 31, 2018	[1]				264,496
Issuance of units, net of offering costs			6,731	$ 192,320			$ 337	[1]	$ 52	[1]		6,394	$ 192,268
Issuance of units, net of offering costs (in shares)	[1]						33,654		5,202
Stock compensation expense		213,890									213,890
Foreign currency translation		18,113												18,113
Net loss		(3,332,213)													(3,332,213)
Balance at Jun. 30, 2018		6,398,765			$ 3,035	[1]					161,506,820			(20,366)	(155,090,724)
Balance (in shares) at Jun. 30, 2018	[1]				303,352
Issuance of units, net of offering costs				$ 405,423					$ 107	[1]			$ 405,316
Issuance of units, net of offering costs (in shares)	[1]								10,710
Stock compensation expense		206,651									206,651
Interest settlement in common stock		272,609			$ 72	[1]					272,537
Interest settlement in common stock (in shares)	[1]				7,212
Foreign currency translation		1,528												1,528
Net loss		(3,255,425)													(3,255,425)
Balance at Sep. 30, 2018		4,029,551			$ 3,214	[1]					162,391,324			(18,838)	(158,346,149)
Balance (in shares) at Sep. 30, 2018	[1]				321,274
Balance at Dec. 31, 2018		3,308,741			$ 4,323	[1]					165,396,036			(13,093)	(162,078,525)
Balance (in shares) at Dec. 31, 2018	[1]				432,286
Issuance of units, net of offering costs			$ 4,782,509				$ 4,500	[1]				$ 4,778,009
Issuance of units, net of offering costs (in shares)	[1]						450,000
Stock compensation expense		98,033									98,033
Foreign currency translation		2,826												2,826
Net loss		(3,853,116)													(3,853,116)
Balance at Mar. 31, 2019		4,338,993			$ 8,823	[1]					170,272,078			(10,267)	(165,931,641)
Balance (in shares) at Mar. 31, 2019	[1]				882,286
Balance at Dec. 31, 2018		3,308,741			$ 4,323	[1]					165,396,036			(13,093)	(162,078,525)
Balance (in shares) at Dec. 31, 2018	[1]				432,286
Net loss		(9,928,565)
Balance at Sep. 30, 2019		(1,556,970)			$ 8,823	[1]					170,449,216			(7,919)	(172,007,090)
Balance (in shares) at Sep. 30, 2019	[1]				882,268
Balance at Mar. 31, 2019		4,338,993			$ 8,823	[1]					170,272,078			(10,267)	(165,931,641)
Balance (in shares) at Mar. 31, 2019	[1]				882,286
Stock compensation expense		85,971									85,971
Foreign currency translation		(4,950)												(4,950)
Net loss		(2,593,011)													(2,593,011)
Balance at Jun. 30, 2019		1,827,003			$ 8,823	[1]					170,358,049			(15,217)	(168,524,652)
Balance (in shares) at Jun. 30, 2019	[1]				882,286
Stock compensation expense		91,167									91,167
Stock/Share cancellation (in shares)	[1]				(18)
Foreign currency translation		7,298												7,298
Net loss		(3,482,438)													(3,482,438)
Balance at Sep. 30, 2019		$ (1,556,970)			$ 8,823	[1]					$ 170,449,216			$ (7,919)	$ (172,007,090)
Balance (in shares) at Sep. 30, 2019	[1]				882,268

[1] Reflects the 1-for-20 reverse stock split that became effective on August 29, 2019. Refer to Note 8 – Stockholders’ equity for further information.