CONSOLIDATED STATEMENT OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($)	Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Income (Loss)	Accumulated Deficit	Total
Balance at Dec. 31, 2018	$ 31,774	$ 186,138,466	$ 288,175	$ (169,523,815)	$ 16,934,600
Balance (in shares) at Dec. 31, 2018	31,774,139
Stock based compensation - employees, consultants and directors	$ 0	1,174,755	0	0	1,174,755
Other comprehensive income (loss), foreign translation adjustment	0	0	868,243	0	868,243
Proceeds from exercise of stock options	$ 172	728,335	0	0	728,507
Proceeds from exercise of stock options (in shares)	171,134
Cashless exercise of warrants	$ 9	(9)	0	0	0
Cashless exercise of warrants (in shares)	9,029
Issuance of restricted stock units	$ 84	663,284	0	0	663,368
Issuance of restricted stock units (in shares)	84,249
Cashless exercise of stock options	$ 22	(22)	0	0	0
Cashless exercise of stock options (in shares)	23,354
Fees related to Open Market Sales Agreement	$ 0	(87,881)	0	0	(87,881)
Proceeds from exercise of warrants	$ 361	1,768,130	0	0	1,768,491
Proceeds from exercise of warrants (in shares)	360,358
Net loss	$ 0	0	0	(15,316,292)	(15,316,292)
Balance at Sep. 30, 2019	$ 32,422	190,385,058	1,156,418	(184,840,107)	6,733,791
Balance (in shares) at Sep. 30, 2019	32,422,263
Balance at Dec. 31, 2018	$ 31,774	186,138,466	288,175	(169,523,815)	16,934,600
Balance (in shares) at Dec. 31, 2018	31,774,139
Balance at Dec. 31, 2019	$ 32,616	191,648,907	525,978	(188,789,459)	3,418,042
Balance (in shares) at Dec. 31, 2019	32,616,107
Balance at Jun. 30, 2019	$ 32,303	189,120,749	344,655	(177,955,046)	11,542,661
Balance (in shares) at Jun. 30, 2019	32,303,231
Stock based compensation - employees, consultants and directors	$ 0	802,334	0	0	802,334
Other comprehensive income (loss), foreign translation adjustment	0	0	811,763	0	811,763
Proceeds from exercise of stock options	$ 87	312,159	0	0	312,246
Proceeds from exercise of stock options (in shares)	86,600
Issuance of restricted stock units	$ 32	237,697	0	0	237,729
Issuance of restricted stock units (in shares)	32,432
Fees related to Open Market Sales Agreement	$ 0	(87,881)	0	0	(87,881)
Net loss	0	0	0	(6,885,061)	(6,885,061)
Balance at Sep. 30, 2019	$ 32,422	190,385,058	1,156,418	(184,840,107)	6,733,791
Balance (in shares) at Sep. 30, 2019	32,422,263
Balance at Dec. 31, 2019	$ 32,616	191,648,907	525,978	(188,789,459)	3,418,042
Balance (in shares) at Dec. 31, 2019	32,616,107
Stock based compensation - employees, consultants and directors	$ 0	2,863,805	0	0	2,863,805
Issuance of common stock, net of fees	$ 10,163	80,203,845	0	0	$ 80,214,008
Issuance of common stock, net of fees (in shares)	10,163,256				4,301,869
Other comprehensive income (loss), foreign translation adjustment	$ 0	0	(1,043,280)	0	$ (1,043,280)
Proceeds from exercise of stock options	$ 298	1,281,964	0	0	1,282,262
Proceeds from exercise of stock options (in shares)	298,075
Issuance of restricted stock units	$ 88	657,692	0	0	657,780
Issuance of restricted stock units (in shares)	87,728
Cashless exercise of stock options	$ 11	(11)	0	0	0
Cashless exercise of stock options (in shares)	10,519
Net loss	$ 0	0	0	(7,159,464)	(7,159,464)
Balance at Sep. 30, 2020	$ 43,176	276,656,202	(517,302)	(195,948,923)	80,233,153
Balance (in shares) at Sep. 30, 2020	43,175,685
Balance at Jun. 30, 2020	$ 36,812	218,864,425	530,447	(195,109,194)	24,322,490
Balance (in shares) at Jun. 30, 2020	36,811,870
Stock based compensation - employees, consultants and directors	$ 0	1,088,173	0	0	1,088,173
Issuance of common stock, net of fees	$ 6,295	56,195,080	0	0	56,201,375
Issuance of common stock, net of fees (in shares)	6,294,998
Other comprehensive income (loss), foreign translation adjustment	$ 0	0	(1,047,749)	0	(1,047,749)
Proceeds from exercise of stock options	$ 36	179,716	0	0	179,752
Proceeds from exercise of stock options (in shares)	35,823
Issuance of restricted stock units	$ 33	328,808	0	0	328,841
Issuance of restricted stock units (in shares)	32,994
Net loss	$ 0	0	0	(839,729)	(839,729)
Balance at Sep. 30, 2020	$ 43,176	$ 276,656,202	$ (517,302)	$ (195,948,923)	$ 80,233,153
Balance (in shares) at Sep. 30, 2020	43,175,685