STATEMENTS OF STOCKHOLDERS' EQUITY (UNAUDITED) - USD ($)	Total	Common Stock	Additional Paid-In Capital	Accumulated Deficit
Balance, shares at Sep. 30, 2019		35,231,776
Balance, amount at Sep. 30, 2019	$ 5,133,667	$ 352,318	$ 358,507,603	$ (353,726,254)
Adoption of new accounting standard	2,146,195			2,146,195
Issuance of common stock, shares		606,395
Issuance of common stock, amount	5,050,003	$ 6,064	5,043,939	0
Warrant exercises, shares		132,900
Warrant exercises, amount	297,101	$ 1,329	295,772	0
Equity based compensation - employees	1,800,225	$ 0	1,800,225	0
contributions paid in common stock, shares		4,474
contributions paid in common stock, amount	40,937	$ 45	40,892	0
Stock issued to nonemployees for service, shares		15,819
Stock issued to nonemployees for service, amount	84,447	$ 158	84,289	0
Purchase of stock by officer, shares		3,725
Purchase of stock by officer, amount	25,000	$ 37	24,963	0
Share issuance costs	(92,150)	0	(92,150)	0
Net loss	(5,531,360)	$ 0	0	(5,531,360)
Balance, shares at Dec. 31, 2019		35,995,089
Balance, amount at Dec. 31, 2019	8,954,065	$ 359,951	365,705,533	(357,111,419)
Balance, shares at Sep. 30, 2019		35,231,776
Balance, amount at Sep. 30, 2019	5,133,667	$ 352,318	358,507,603	(353,726,254)
Net loss	(24,876,157)
Balance, shares at Jun. 30, 2020		38,522,236
Balance, amount at Jun. 30, 2020	20,888,291	$ 385,223	396,959,284	(376,456,216)
Balance, shares at Dec. 31, 2019		35,995,089
Balance, amount at Dec. 31, 2019	8,954,065	$ 359,951	365,705,533	(357,111,419)
Warrant exercises, shares		562,100
Warrant exercises, amount	4,318,706	$ 5,621	4,313,085	0
Equity based compensation - employees	1,780,979	$ 0	1,780,979	0
contributions paid in common stock, shares		3,376
contributions paid in common stock, amount	38,959	$ 34	38,925	0
Stock issued to nonemployees for service, shares		17,120
Stock issued to nonemployees for service, amount	235,024	$ 171	234,853	0
Share issuance costs	(199,372)	0	(199,372)	0
Net loss	(9,067,818)	$ 0	0	(9,067,818)
Proceeds from the sale of common stock, shares		721,459
Proceeds from the sale of common stock, amount	7,867,629	$ 7,215	7,860,414	0
Purchase of stock by officers and directors, shares		16,787
Purchase of stock by officers and directors, amount	159,990	$ 168	159,822	0
Option exercises, shares		20,480
Option exercises, amount	49,898	$ 205	49,693	0
Balance, shares at Mar. 31, 2020		37,336,411
Balance, amount at Mar. 31, 2020	14,138,060	$ 373,365	379,943,932	(366,179,237)
Warrant exercises, shares		849,845
Warrant exercises, amount	10,156,275	$ 8,498	10,147,777	0
Equity based compensation - employees	3,109,127	$ 0	3,109,127	0
contributions paid in common stock, shares		2,875
contributions paid in common stock, amount	42,895	$ 29	42,866	0
Stock issued to nonemployees for service, shares		14,811
Stock issued to nonemployees for service, amount	205,381	$ 148	205,233	0
Share issuance costs	(418,497)	0	(418,497)	0
Net loss	(10,276,979)	$ 0	0	(10,276,979)
Proceeds from the sale of common stock, shares		94,575
Proceeds from the sale of common stock, amount	1,074,807	$ 946	1,073,861	0
Option exercises, shares		73,719
Option exercises, amount	276,415	$ 737	275,678	0
Shares issued for settlement of clinical research costs, shares		150,000
Shares issued for settlement of clinical research costs, amount	1,769,500	$ 1,500	1,768,000	0
Modification of warrants	5,554	0	5,554	0
Warrant issuances	805,753	$ 0	805,753	0
Balance, shares at Jun. 30, 2020		38,522,236
Balance, amount at Jun. 30, 2020	20,888,291	$ 385,223	396,959,284	(376,456,216)
Balance, shares at Sep. 30, 2020		38,730,150
Balance, amount at Sep. 30, 2020	19,726,674	$ 387,302	401,174,675	(381,835,303)
Warrant exercises, shares		15,000
Warrant exercises, amount	89,250	$ 150	89,100	0
Equity based compensation - employees	3,296,309	$ (20)	3,296,329	0
contributions paid in common stock, shares		3,564
contributions paid in common stock, amount	41,671	$ 36	41,635	0
Share issuance costs	(117,021)	0	(117,021)	0
Net loss	(7,936,864)	$ 0	0	(7,936,864)
Proceeds from the sale of common stock, shares		1,000,000
Proceeds from the sale of common stock, amount	13,559,500	$ 10,000	13,549,500	0
Option exercises, shares		5,300
Option exercises, amount	23,511	$ 53	23,458	0
Modification of warrants	192	$ 0	192	0
Equity based compensation - employees, shares		(2,000)
Stock and options issued to nonemployees for service, shares		15,044
Stock and options issued to nonemployees for service, amount	152,450	$ 150	152,300	0
Balance, shares at Dec. 31, 2020		39,767,058
Balance, amount at Dec. 31, 2020	28,835,672	$ 397,671	418,210,168	(389,772,167)
Balance, shares at Sep. 30, 2020		38,730,150
Balance, amount at Sep. 30, 2020	19,726,674	$ 387,302	401,174,675	(381,835,303)
Net loss	(28,156,252)
Balance, shares at Jun. 30, 2021		42,963,391
Balance, amount at Jun. 30, 2021	59,793,744	$ 429,634	469,355,665	(409,991,555)
Balance, shares at Dec. 31, 2020		39,767,058
Balance, amount at Dec. 31, 2020	28,835,672	$ 397,671	418,210,168	(389,772,167)
Warrant exercises, shares		991,239
Warrant exercises, amount	7,938,841	$ 9,912	7,928,929	0
Equity based compensation - employees	3,282,742	$ 0	3,282,742	0
contributions paid in common stock, shares		3,347
contributions paid in common stock, amount	51,420	$ 33	51,387	0
Share issuance costs	(13,828)	0	(13,828)	0
Net loss	(11,281,120)	$ 0	0	(11,281,120)
Option exercises, shares		48,845
Option exercises, amount	138,788	$ 489	138,299	0
Stock and options issued to nonemployees for service, shares		13,486
Stock and options issued to nonemployees for service, amount	379,277	$ 135	379,142	0
Balance, shares at Mar. 31, 2021		40,823,975
Balance, amount at Mar. 31, 2021	29,331,792	$ 408,240	429,976,839	(401,053,287)
Warrant exercises, shares		437,312
Warrant exercises, amount	1,379,490	$ 4,373	1,375,117	0
Equity based compensation - employees	3,511,359	$ 0	3,511,359	0
contributions paid in common stock, shares		6,111
contributions paid in common stock, amount	53,205	$ 61	53,144	0
Share issuance costs	(103,185)	0	(103,185)	0
Net loss	(8,938,268)	$ 0	0	(8,938,268)
Proceeds from the sale of common stock, shares		1,610,000
Proceeds from the sale of common stock, amount	33,803,926	$ 16,100	33,787,826	0
Option exercises, shares		72,809
Option exercises, amount	464,162	$ 728	463,434	0
Modification of warrants	24,195	$ 0	24,195	0
Stock and options issued to nonemployees for service, shares		13,184
Stock and options issued to nonemployees for service, amount	267,068	$ 132	266,936	0
Balance, shares at Jun. 30, 2021		42,963,391
Balance, amount at Jun. 30, 2021	$ 59,793,744	$ 429,634	$ 469,355,665	$ (409,991,555)