Consolidated Statements of Changes in Shareholders' Equity (Unaudited) - USD ($)	Common Stock	Additional Paid-In Capital	Accumulated Other Comprehensive Loss	Accumulated Deficit	Total
Balance at Dec. 31, 2018	$ 17,683	$ 172,436,176	$ (3,669)	$ (166,170,020)	$ 6,280,170
Balance (in Shares) at Dec. 31, 2018	17,682,839
Issuance of common stock pursuant to FBR At Market Sales Issuance Agreement	$ 861	841,383			842,244
Issuance of common stock pursuant to FBR At Market Sales Issuance Agreement (in Shares)	861,352
Issuance costs associated with FBR At Market Sales Issuance Agreement		(33,215)			(33,215)
Issuance of common stock to vendors	$ 197	160,860			161,057
Issuance of common stock to vendors (in Shares)	197,019
Share-based compensation expense		152,465			152,465
Foreign currency translation adjustment			(3,339)		(3,339)
Net loss				(3,763,148)	(3,763,148)
Balance at Jun. 30, 2019	$ 18,741	173,557,669	(7,008)	(169,933,168)	3,636,234
Balance (in Shares) at Jun. 30, 2019	18,741,210
Balance at Mar. 31, 2019	$ 18,189	173,076,044	(3,020)	(167,809,647)	5,281,566
Balance (in Shares) at Mar. 31, 2019	18,189,208
Issuance of common stock pursuant to FBR At Market Sales Issuance Agreement	$ 415	319,245			319,660
Issuance of common stock pursuant to FBR At Market Sales Issuance Agreement (in Shares)	414,983
Issuance costs associated with FBR At Market Sales Issuance Agreement		(13,832)			(13,832)
Issuance of common stock to vendors	$ 137	103,320			103,457
Issuance of common stock to vendors (in Shares)	137,019
Share-based compensation expense		72,892			72,892
Foreign currency translation adjustment			(3,988)		(3,988)
Net loss				(2,123,521)	(2,123,521)
Balance at Jun. 30, 2019	$ 18,741	173,557,669	(7,008)	(169,933,168)	3,636,234
Balance (in Shares) at Jun. 30, 2019	18,741,210
Balance at Dec. 31, 2019	$ 21,753	177,006,004	(45,010)	(175,525,612)	1,457,135
Balance (in Shares) at Dec. 31, 2019	21,753,124
Issuance of common stock pursuant to FBR At Market Sales Issuance Agreement	$ 4,545	9,455,404			9,459,949
Issuance of common stock pursuant to FBR At Market Sales Issuance Agreement (in Shares)	4,545,116
Issuance costs associated with FBR At Market Sales Issuance Agreement		(425,524)			(425,524)
Issuance of common stock for milestone	$ 1,956	4,998,044			5,000,000
Issuance of common stock for milestone (in Shares)	1,956,182
Issuance of common stock to vendors	$ 30	58,970			59,000
Issuance of common stock to vendors (in Shares)	30,000
Exercise of common stock options	$ 2				2
Exercise of common stock options (in Shares)	2,189
Exercise of warrants	$ 305	685,079			685,384
Exercise of warrants (in Shares)	304,821
Share-based compensation expense		144,694			144,694
Foreign currency translation adjustment			8,059		8,059
Net loss				(10,358,097)	(10,358,097)
Balance at Jun. 30, 2020	$ 28,591	191,922,671	(36,951)	(185,883,709)	6,030,602
Balance (in Shares) at Jun. 30, 2020	28,591,432
Balance at Mar. 31, 2020	$ 25,778	186,624,561	(28,767)	(183,106,946)	3,514,626
Balance (in Shares) at Mar. 31, 2020	25,778,431
Issuance of common stock pursuant to FBR At Market Sales Issuance Agreement	$ 2,813	5,467,910			5,470,723
Issuance of common stock pursuant to FBR At Market Sales Issuance Agreement (in Shares)	2,813,001
Issuance costs associated with FBR At Market Sales Issuance Agreement		(250,803)			(250,803)
Share-based compensation expense		81,003			81,003
Foreign currency translation adjustment			(8,184)		(8,184)
Net loss				(2,776,763)	(2,776,763)
Balance at Jun. 30, 2020	$ 28,591	$ 191,922,671	$ (36,951)	$ (185,883,709)	$ 6,030,602
Balance (in Shares) at Jun. 30, 2020	28,591,432