STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($)	Total	Common Stock	Additional Paid-In Capital	Accumulated Deficit
Balance, shares at Sep. 30, 2018		28,034,487
Balance, amount at Sep. 30, 2018	$ 916	$ 280,346	$ 331,312,184	$ (331,591,614)
Warrant exercises, shares		298,682
Warrant exercises, amount	649,753	$ 2,987	646,766
401(k) contributions paid in common stock, shares		12,279
401(k) contributions paid in common stock, amount	35,241	$ 123	35,118	0
Stock issued to nonemployees for service, shares		62,784
Stock issued to nonemployees for service, amount	202,380	$ 628	201,752	0
Shares returned for settlement of clinical research costs, shares		(564,905)
Shares returned for settlement of clinical research costs, amount	0	$ (5,649)	5,649	0
Equity based compensation - employees, shares		0
Equity based compensation - employees, amount	573,660	0	573,660	0
Net income	1,245,902	$ 0	0	1,245,902
Balance, shares at Dec. 31, 2018		27,843,327
Balance, amount at Dec. 31, 2018	2,707,852	$ 278,435	332,775,129	(330,345,712)
Balance, shares at Sep. 30, 2018		28,034,487
Balance, amount at Sep. 30, 2018	916	$ 280,346	331,312,184	(331,591,614)
Net income	$ (17,286,547)
Option exercises, shares	42,770
Balance, shares at Jun. 30, 2019		34,066,914
Balance, amount at Jun. 30, 2019	$ 1,146,304	$ 340,669	349,683,796	(348,878,161)
Balance, shares at Dec. 31, 2018		27,843,327
Balance, amount at Dec. 31, 2018	2,707,852	$ 278,435	332,775,129	(330,345,712)
Warrant exercises, shares		1,523,933
Warrant exercises, amount	2,655,634	$ 15,239	2,640,395	0
401(k) contributions paid in common stock, shares		10,419
401(k) contributions paid in common stock, amount	36,883	$ 104	36,779	0
Stock issued to nonemployees for service, shares		77,449
Stock issued to nonemployees for service, amount	225,629	$ 774	224,855	0
Shares returned for settlement of clinical research costs, shares		500,000
Shares returned for settlement of clinical research costs, amount	1,290,000	$ 5,000	1,285,000	0
Equity based compensation - employees, shares		(3,500)
Equity based compensation - employees, amount	530,830	(35)	530,865	0
Net income	(6,447,681)	0	0	(6,447,681)
Share issuance costs	(43,625)	$ 0	(43,625)	0
Balance, shares at Mar. 31, 2019		29,951,628
Balance, amount at Mar. 31, 2019	955,522	$ 299,517	337,449,398	(336,793,393)
Warrant exercises, shares		4,014,109
Warrant exercises, amount	10,252,821	$ 40,141	10,212,680	0
401(k) contributions paid in common stock, shares		4,339
401(k) contributions paid in common stock, amount	36,361	$ 43	36,318	0
Stock issued to nonemployees for service, shares		20,825
Stock issued to nonemployees for service, amount	140,270	$ 208	140,062	0
Equity based compensation - employees, amount	1,521,821	(40)	1,521,861	0
Net income	(12,084,768)	0	0	(12,084,768)
Share issuance costs	(8,010)	$ 0	(8,010)	0
Purchase of stock by officers and directors, shares		37,243
Purchase of stock by officers and directors, amount	$ 234,997	$ 372	234,625	0
Option exercises, shares	42,770	42,770
Option exercises, amount	$ 97,290	$ 428	96,862	0
Balance, shares at Jun. 30, 2019		34,066,914
Balance, amount at Jun. 30, 2019	1,146,304	$ 340,669	349,683,796	(348,878,161)
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)
Warrant exercises, shares		132,900
Warrant exercises, amount	297,101	$ 1,329	295,772	0
401(k) contributions paid in common stock, shares		4,474
401(k) 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
Equity based compensation - employees, shares		0
Net income	(5,531,360)	0	0	(5,531,360)
Share issuance costs	(92,150)	$ 0	(92,150)	0
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
Equity based compensation - employees, amount	1,800,225	$ 0	1,800,225
Purchase of stock by officer, shares		3,725
Purchase of stock by officer, amount	25,000	$ 37	24,963	0
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 income	$ (24,876,157)
Option exercises, shares	94,199
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
401(k) contributions paid in common stock, shares		3,376
401(k) 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
Equity based compensation - employees, shares		0
Net income	(9,067,818)	0	0	(9,067,818)
Share issuance costs	(199,372)	$ 0	(199,372)	0
Purchase of stock by officers and directors, shares		16,787
Option exercises, shares		20,480
Option exercises, amount	49,898	$ 205	49,693	0
Equity based compensation - employees, amount	1,780,979	$ 0	1,780,979	0
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, amount	159,990	$ 168	159,822	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
401(k) contributions paid in common stock, shares		2,875
401(k) 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
Net income	(10,276,979)	0	0	(10,276,979)
Share issuance costs	$ (418,497)	$ 0	(418,497)	0
Option exercises, shares	73,719	73,719
Option exercises, amount	$ 276,415	$ 737	275,678	0
Equity based compensation - employees, amount	3,109,127	$ 0	3,109,127	0
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
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, amount	5,554	0	5,554	0
Warrant issuances, amount	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)