STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($)	Common Stock	Additional Paid-In Capital	Accumulated Deficit	Total
Beginning balance, shares at Sep. 30, 2018	28,034,487
Beginning balance, amount at Sep. 30, 2018	$ 280,346	$ 331,312,184	$ (331,591,614)	$ 916
Warrant exercises, shares	298,682
Warrant exercises	$ 2,987	646,766		649,753
Equity based compensation - employees		573,660		573,660
401(k) contributions paid in common stock, shares	12,279
401(k) contributions paid in common stock	$ 123	35,118		35,241
Stock issued to nonemployees for service, shares	62,784
Stock issued to nonemployees for service	$ 628	201,752		202,380
Shares issued (returned) for settlement of clinical research costs, shares	(564,905)
Shares issued (returned) for settlement of clinical research costs	$ (5,649)	5,649		0
Net income (loss)			1,245,902	1,245,902
Ending balance, shares at Dec. 31, 2018	27,843,327
Ending balance, amount at Dec. 31, 2018	$ 278,435	332,775,129	(330,345,712)	2,707,852
Beginning balance, shares at Sep. 30, 2018	28,034,487
Beginning balance, amount at Sep. 30, 2018	$ 280,346	331,312,184	(331,591,614)	916
Net income (loss)				(5,201,779)
Ending balance, shares at Mar. 31, 2019	29,951,628
Ending balance, amount at Mar. 31, 2019	$ 299,517	337,449,398	(336,793,393)	955,522
Beginning balance, shares at Dec. 31, 2018	27,843,327
Beginning balance, amount at Dec. 31, 2018	$ 278,435	332,775,129	(330,345,712)	2,707,852
Warrant exercises, shares	1,523,933
Warrant exercises	$ 15,239	2,640,395		2,655,634
Equity based compensation - employees, shares	(3,500)
Equity based compensation - employees	$ (35)	530,865		530,830
401(k) contributions paid in common stock, shares	10,419
401(k) contributions paid in common stock	$ 104	36,779		36,883
Stock issued to nonemployees for service, shares	77,449
Stock issued to nonemployees for service	$ 774	224,855		225,629
Shares issued (returned) for settlement of clinical research costs, shares	500,000
Shares issued (returned) for settlement of clinical research costs	$ 5,000	1,285,000		1,290,000
Share issuance costs		(43,625)		(43,625)
Net income (loss)			(6,447,681)	(6,447,681)
Ending balance, shares at Mar. 31, 2019	29,951,628
Ending balance, amount at Mar. 31, 2019	$ 299,517	337,449,398	(336,793,393)	955,522
Beginning balance, shares at Sep. 30, 2019	35,231,776
Beginning balance, amount at Sep. 30, 2019	$ 352,318	358,507,603	(353,726,254)	5,133,667
Adoption of new accounting standard			2,146,195	2,146,195
Issuance of common stock, shares	606,395
Issuance of common stock, amount	$ 6,064	5,043,939		5,050,003
Warrant exercises, shares	132,900
Warrant exercises	$ 1,329	295,772		297,101
Equity based compensation - employees		1,800,225		1,800,225
401(k) contributions paid in common stock, shares	4,474
401(k) contributions paid in common stock	$ 45	40,892		40,937
Stock issued to nonemployees for service, shares	15,819
Stock issued to nonemployees for service	$ 158	84,289		84,447
Purchase of stock by officers and directors, shares	3,725
Purchase of stock by officers and directors	$ 37	24,963		25,000
Share issuance costs		(92,150)		(92,150)
Net income (loss)			(5,531,360)	(5,531,360)
Ending balance, shares at Dec. 31, 2019	35,995,089
Ending balance, amount at Dec. 31, 2019	$ 359,951	365,705,533	(357,111,419)	8,954,065
Beginning balance, shares at Sep. 30, 2019	35,231,776
Beginning balance, amount at Sep. 30, 2019	$ 352,318	358,507,603	(353,726,254)	5,133,667
Net income (loss)				(14,599,178)
Ending balance, shares at Mar. 31, 2020	37,336,411
Ending balance, amount at Mar. 31, 2020	$ 373,365	379,943,932	(366,179,237)	14,138,060
Beginning balance, shares at Dec. 31, 2019	35,995,089
Beginning balance, amount at Dec. 31, 2019	$ 359,951	365,705,533	(357,111,419)	8,954,065
Issuance of common stock, shares	721,459
Issuance of common stock, amount	$ 7,215	7,860,414		7,867,629
Warrant exercises, shares	562,100
Warrant exercises	$ 5,621	4,313,085		4,318,706
Equity based compensation - employees		1,780,979		1,780,979
401(k) contributions paid in common stock, shares	3,376
401(k) contributions paid in common stock	$ 34	38,925		38,959
Stock issued to nonemployees for service, shares	17,120
Stock issued to nonemployees for service	$ 171	234,853		235,024
Purchase of stock by officers and directors, shares	16,787
Purchase of stock by officers and directors	$ 168	159,822		159,990
Option exercises, shares	20,480
Option exercises	$ 205	49,693		49,898
Share issuance costs		(199,372)		(199,372)
Net income (loss)			(9,067,818)	(9,067,818)
Ending balance, shares at Mar. 31, 2020	37,336,411
Ending balance, amount at Mar. 31, 2020	$ 373,365	$ 379,943,932	$ (366,179,237)	$ 14,138,060