Condensed Consolidated Statements of Stockholders' Equity (unaudited) - USD ($)	Common Stock [Member]	Preferred Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Accumulated Deficit [Member]	Total
Balance at Dec. 31, 2019	$ 55,823		$ 178,779,814	$ (17,315)	$ (174,524,983)	$ 4,293,339
Balance (in shares) at Dec. 31, 2019	5,582,280
At the market offering, net of offering costs	$ 28,149		5,449,283			5,477,432
At the market offering, net of offering costs, shares	2,814,934
Common stock warrant exercises	$ 40,710		8,101,290			8,142,000
Common stock warrant exercises, shares	4,071,000
Stock compensation expense			79,740			79,740
Foreign currency translation				39,477		39,477
Net loss					(3,949,294)	(3,949,294)
Balance at Mar. 31, 2020	$ 124,682		192,410,127	22,162	(178,474,277)	14,082,694
Balance (in shares) at Mar. 31, 2020	12,468,214
Balance at Dec. 31, 2019	$ 55,823		178,779,814	(17,315)	(174,524,983)	4,293,339
Balance (in shares) at Dec. 31, 2019	5,582,280
Inducement expense related to warrant reprice
Shares issued in business combination						4,847,417
Net loss						(19,100,527)
Balance at Sep. 30, 2020	$ 197,993		208,892,463	1,614,002	(193,625,510)	17,078,948
Balance (in shares) at Sep. 30, 2020	19,799,438
Balance at Dec. 31, 2019	$ 55,823		178,779,814	(17,315)	(174,524,983)	4,293,339
Balance (in shares) at Dec. 31, 2019	5,582,280
Balance at Dec. 31, 2020	$ 250,855		219,129,045	2,547,182	(200,735,827)	21,191,255
Balance (in shares) at Dec. 31, 2020	25,085,534
Balance at Mar. 31, 2020	$ 124,682		192,410,127	22,162	(178,474,277)	14,082,694
Balance (in shares) at Mar. 31, 2020	12,468,214
At the market offering, net of offering costs	$ 27,394		5,870,807			5,898,201
At the market offering, net of offering costs, shares	2,739,442
Shares issued in business combination	$ 20,282		4,827,135			4,847,417
Shares issued in business combination, shares	2,028,208
Value of equity awards assumed in business combination			136,912			136,912
Issuance of RSUs	$ 52		(52)
Issuance of RSUs (in shares)	5,166
Shares issued to settle convertible notes	$ 4,529		875,903			880,432
Shares issued to settle convertible notes (in shares)	452,902
Stock compensation expense			33,587			33,587
Foreign currency translation				324,939		324,939
Net loss					(7,475,638)	(7,475,638)
Balance at Jun. 30, 2020	$ 176,939		204,154,419	347,101	(185,949,915)	18,728,544
Balance (in shares) at Jun. 30, 2020	17,693,932
At the market offering, net of offering costs	$ 15,237		3,591,793			3,607,030
At the market offering, net of offering costs, shares	1,523,663
Common stock warrant exercises	$ 2,700		537,000			540,000
Common stock warrant exercises, shares	270,000
Issuance of RSUs	$ 7		(7)
Issuance of RSUs (in shares)	750
Shares issued to settle convertible notes	$ 3,110		567,255			570,365
Shares issued to settle convertible notes (in shares)	311,003
Stock compensation expense			41,703			41,703
Foreign currency translation				1,266,901		1,266,901
Net loss					(7,675,595)	(7,675,595)
Balance at Sep. 30, 2020	$ 197,993		208,892,463	1,614,002	(193,625,510)	17,078,948
Balance (in shares) at Sep. 30, 2020	19,799,438
Balance at Dec. 31, 2020	$ 250,855		219,129,045	2,547,182	(200,735,827)	21,191,255
Balance (in shares) at Dec. 31, 2020	25,085,534
Offering of common stock and warrants, net of issuance costs	$ 83,334		23,390,628			23,473,962
Offering of common stock and warrants, net of issuance costs (in shares)	8,333,333
Inducement expense related to warrant reprice			7,755,541			7,755,541
Common stock warrant exercises, net of issuance costs	$ 48,476		9,045,696			9,094,172
Common stock warrant exercises, net of issuance costs, shares	4,847,615
Proceeds from issuance of common stock warrants			255,751			255,751
Stock compensation expense			189,670			189,670
Foreign currency translation				(1,078,479)		(1,078,479)
Net loss					(14,850,591)	(14,850,591)
Balance at Mar. 31, 2021	$ 382,665		259,766,331	1,468,703	(215,586,418)	46,031,281
Balance (in shares) at Mar. 31, 2021	38,266,482
Balance at Dec. 31, 2020	$ 250,855		219,129,045	2,547,182	(200,735,827)	21,191,255
Balance (in shares) at Dec. 31, 2020	25,085,534
Inducement expense related to warrant reprice						7,755,541
Shares issued in business combination
Net loss						(27,993,848)
Balance at Sep. 30, 2021	$ 382,703		260,244,997	1,400,827	(228,729,675)	33,298,852
Balance (in shares) at Sep. 30, 2021	38,270,250
Balance at Mar. 31, 2021	$ 382,665		259,766,331	1,468,703	(215,586,418)	46,031,281
Balance (in shares) at Mar. 31, 2021	38,266,482
Issuance of RSUs	$ 38		(38)
Issuance of RSUs (in shares)	3,768
Stock compensation expense			261,548			261,548
Foreign currency translation				529,651		529,651
Net loss					(7,086,561)	(7,086,561)
Balance at Jun. 30, 2021	$ 382,703		260,027,841	1,998,354	(222,672,979)	39,735,919
Balance (in shares) at Jun. 30, 2021	38,270,250
Stock compensation expense			217,156			217,156
Foreign currency translation				(597,527)		(597,527)
Net loss					(6,056,696)	(6,056,696)
Balance at Sep. 30, 2021	$ 382,703		$ 260,244,997	$ 1,400,827	$ (228,729,675)	$ 33,298,852
Balance (in shares) at Sep. 30, 2021	38,270,250