Statements of Changes in Stockholders' Equity - USD ($)		Series A Convertible Preferred Stock [Member]	Series A-2 Convertible Preferred Stock [Member]	Series B Convertible Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Deficit [Member]	Total
Balance at Dec. 31, 2017		$ 293	$ 79	$ 92	$ 257	$ 24,351,138	$ (19,261,186)	$ 5,090,673
Balance (in shares) at Dec. 31, 2017		2,932,431	788,827	918,983	2,566,530
Issuance of common stock in initial public offering	[1]	$ 0	$ 0	$ 0	$ 273	24,547,530	0	24,547,803
Issuance of common stock in initial public offering (in shares)	[1]	0	0	0	2,730,000
Issuance of common stock in follow-on public offering (in shares)	[2]	0	0	0	1,380,000
Issuance of common stock in follow-on public offering	[2]	$ 0	$ 0	$ 0	$ 138	2,817,611	0	2,817,749
Exercise of warrants on a cashless basis		$ 0	$ 0	$ 0	$ 6	(6)	0	0
Exercise of warrants on a cashless basis (in shares)		0	0	0	61,385
Stock-based compensation		$ 0	$ 0	$ 0	$ 0	1,615,470	0	1,615,470
Net loss		0	0	0	0	0	(17,253,108)	(17,253,108)
Exercise of stock options		$ 0	$ 0	$ 0	$ 3	56,479	0	56,482
Exercise of stock options (in shares)		0	0	0	28,965
Conversion of convertible preferred stock into common stock upon completion of initial public offering		$ (293)	$ (79)	$ (92)	$ 470	(6)	0	0
Conversion of convertible preferred stock into common stock upon completion of initial public offering (in shares)		(2,932,431)	(788,827)	(918,983)	4,702,116
Balance at Dec. 31, 2018		$ 0	$ 0	$ 0	$ 1,147	53,388,216	(36,514,294)	16,875,069
Balance (in shares) at Dec. 31, 2018		0	0	0	11,468,996
Issuance of common stock in public offering	[3]	$ 0	$ 0	$ 0	$ 505	12,958,070	0	12,958,575
Issuance of common stock in public offering (in shares)	[3]	0	0	0	5,046,763
Exercise of stock options on a cashless basis		$ 0	$ 0	$ 0	$ 24	(24)	0	0
Exercise of stock options on a cashless basis (in shares)		0	0	0	236,466
Stock-based compensation		$ 0	$ 0	$ 0	$ 0	2,511,944	0	2,511,944
Net loss		0	0	0	0	0	(21,156,758)	(21,156,758)
Exercise of stock options		0	0	0	$ 348,501	551,743	0	551,777
Exercise of stock options (in shares)					34
Balance at Dec. 31, 2019		$ 0	$ 0	$ 0	$ 1,710	$ 69,409,949	$ (57,671,052)	$ 11,740,607
Balance (in shares) at Dec. 31, 2019		0	0	0	17,100,726

[1] [1] Includes gross proceeds of $27,300,000, less total issuance costs of $2,752,197.

[2] [2] Includes gross proceeds of $3,381,000, less total issuance costs of $563,251.

[3] [3] Includes gross proceeds of $14,030,001, less total issuance costs of $1,071,931.