Condensed Consolidated Statements of Stockholders' Equity - USD ($)	Total	Public Offering [Member]	Common Stock [Member]	Common Stock [Member] Public Offering [Member]	Additional Paid-in Capital [Member]	Additional Paid-in Capital [Member] Public Offering [Member]	Accumulated Other Comprehensive Loss [Member]	Accumulated Deficit [Member]
Balance at Dec. 31, 2017	$ 1,400,997		$ 22,653		$ 150,114,671		$ (25,900)	$ (148,710,427)
Balance (in shares) at Dec. 31, 2017			2,265,320
Issuance of units, net of offering costs		$ 10,721,400		$ 30,192		$ 10,691,208
Issuance of units, net of offering costs (in shares)				3,019,230
Issuance of RSUs			$ 54		(54)
Issuance of RSUs (in shares)			5,400
Stock compensation expense	238,190				238,190
Stock cancellation (in shares)			(31)
Foreign currency translation	(12,579)						(12,579)
Net loss	(3,048,084)							(3,048,084)
Balance at Mar. 31, 2018	9,299,924		$ 52,899		161,044,015		(38,479)	(151,758,511)
Balance (in shares) at Mar. 31, 2018			5,289,919
Balance at Dec. 31, 2017	1,400,997		$ 22,653		150,114,671		(25,900)	(148,710,427)
Balance (in shares) at Dec. 31, 2017			2,265,320
Balance at Dec. 31, 2018	3,308,741		$ 86,457		165,313,902		(13,093)	(162,078,525)
Balance (in shares) at Dec. 31, 2018			8,645,720
Issuance of units, net of offering costs		$ 4,782,509		$ 90,000		$ 4,692,509
Issuance of units, net of offering costs (in shares)				9,000,000
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		$ 176,457		$ 170,104,444		$ (10,267)	$ (165,931,641)
Balance (in shares) at Mar. 31, 2019			17,645,720