Condensed Consolidated Statements of Stockholders' Equity - USD ($)	Common Stock [Member]	Additional Paid-In Capital [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive Income [Member]	Class A Preferred Stock	Class B Preferred Stock	Class C Preferred Stock	Total
Balance at Dec. 31, 2018	$ 30,319	$ 179,501,577	$ (140,988,484)	$ 3,153	$ 0	$ 0	$ 0	$ 38,546,565
Balance (in shares) at Dec. 31, 2018	30,319,038				0	0	0
Net loss	$ 0	0	(17,383,940)	0	$ 0	$ 0	$ 0	(17,383,940)
Other comprehensive income (loss), net of taxes	0	0	0	(69,155)	0	0	0	(69,155)
Stock-based compensation expense	0	5,280,931	0	0	0	0	0	5,280,931
Accelerated stock-based compensation expense		10,789,774						10,789,774
Proceeds from public offering, net of costs of $106,300	$ 4,313	68,806,405	0	0	0	0	$ 0	68,810,718
Proceeds from public offering, net of costs of $106,300 (in shares)	4,312,500						0
Issuance of common stock for board of director compensation	$ 5	70,329	0	0	0	0	$ 0	70,334
Issuance of common stock for board of director compensation (in shares)	4,488						0
Proceeds from exercise of stock options and warrants	$ 1,207	4,282,688	0	0	0	0	$ 0	4,283,895
Proceeds from exercise of stock options and warrants (in shares)	1,207,506						0
Balance at Sep. 30, 2019	$ 35,844	268,731,704	(158,372,424)	(66,002)	$ 0	$ 0	$ 0	110,329,122
Balance (in shares) at Sep. 30, 2019	35,843,532				0	0	0
Balance at Jun. 30, 2019	$ 35,486	254,580,262	(145,903,877)	38,304	$ 0	$ 0	$ 0	108,750,175
Balance (in shares) at Jun. 30, 2019	35,485,570						0
Net loss	$ 0	0	(12,468,547)	0	0	0	$ 0	(12,468,547)
Other comprehensive income (loss), net of taxes	0	0	0	(104,306)	0	0	0	(104,306)
Stock-based compensation expense	0	1,925,108	0	0	0	0	0	1,925,108
Accelerated stock-based compensation expense	0	10,789,774	0	0	0	0	0	10,789,774
Issuance of common stock for board of director compensation	$ 1	20,665	0	0	0	0	$ 0	20,666
Issuance of common stock for board of director compensation (in shares)	1,249						0
Proceeds from exercise of stock options and warrants	$ 357	1,415,895	0	0	0	0	$ 0	1,416,252
Proceeds from exercise of stock options and warrants (in shares)	356,713						0
Balance at Sep. 30, 2019	$ 35,844	268,731,704	(158,372,424)	(66,002)	$ 0	$ 0	$ 0	110,329,122
Balance (in shares) at Sep. 30, 2019	35,843,532				0	0	0
Balance at Dec. 31, 2019	$ 37,340	285,609,022	(159,319,963)	(45,051)	$ 0	$ 0	$ 0	126,281,348
Balance (in shares) at Dec. 31, 2019	37,339,787				0	0	0
Net loss	$ 0	0	(21,163,460)	0	$ 0	$ 0	$ 0	(21,163,460)
Other comprehensive income (loss), net of taxes	0	0	0	251,677	0	0	0	251,677
Stock-based compensation expense	0	6,292,546	0	0	0	0	0	6,292,546
Issuance of common stock for board of director compensation	$ 2	61,998	0	0	0	0	$ 0	62,000
Issuance of common stock for board of director compensation (in shares)	2,400						0
Proceeds from exercise of stock options and warrants	$ 1,642	8,310,253	0	0	0	0	$ 0	8,311,895
Proceeds from exercise of stock options and warrants (in shares)	1,641,637						0
Balance at Sep. 30, 2020	$ 38,984	300,273,819	(180,483,423)	206,626	$ 0	$ 0	$ 0	120,036,006
Balance (in shares) at Sep. 30, 2020	38,983,824				0	0	0
Balance at Jun. 30, 2020	$ 38,565	295,423,521	(169,065,602)	260,204	$ 0	$ 0	$ 0	126,656,688
Balance (in shares) at Jun. 30, 2020	38,565,193				0	0	0
Net loss	$ 0	0	(11,417,821)	0	$ 0	$ 0	$ 0	(11,417,821)
Other comprehensive income (loss), net of taxes	0	0	0	(53,578)	0	0	0	(53,578)
Stock-based compensation expense	0	2,412,005	0	0	0	0	0	2,412,005
Issuance of common stock for board of director compensation	$ 1	20,666	0	0	0	0	$ 0	20,667
Issuance of common stock for board of director compensation (in shares)	432						0
Proceeds from exercise of stock options and warrants	$ 418	2,417,627	0	0	$ 0	$ 0	$ 0	2,418,045
Proceeds from exercise of stock options and warrants (in shares)	418,199				0	0	0
Balance at Sep. 30, 2020	$ 38,984	$ 300,273,819	$ (180,483,423)	$ 206,626	$ 0	$ 0	$ 0	$ 120,036,006
Balance (in shares) at Sep. 30, 2020	38,983,824				0	0	0