Condensed Statements of Changes in Stockholders' Equity - USD ($)		Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Deficit [Member]	Total
Balance at Dec. 31, 2018		$ 1,147	$ 53,388,216	$ (36,514,294)	$ 16,875,069
Balance (in shares) at Dec. 31, 2018		11,468,996
Exercise of stock options on a cashless basis		$ 24	(24)	0	0
Exercise of stock options on a cashless basis (in shares)		236,466
Stock-based compensation		$ 0	1,032,960	0	1,032,960
Net loss		0	0	(5,932,384)	(5,932,384)
Exercise of stock options		$ 31	483,857	0	483,888
Exercise of stock options (in shares)		313,686
Balance at Mar. 31, 2019		$ 1,202	54,905,009	(42,446,678)	12,459,533
Balance (in shares) at Mar. 31, 2019		12,019,148
Balance at Dec. 31, 2019		$ 1,710	69,409,949	(57,671,052)	11,740,607
Balance (in shares) at Dec. 31, 2019		17,100,726
Issuance of common stock and warrants in public offering	[1]	$ 267	5,451,475	0	5,451,742
Issuance of common stock and warrants in public offering (in shares)	[1]	2,675,293
Stock-based compensation		$ 0	583,865	0	583,865
Net loss		0	0	(5,450,910)	(5,450,910)
Balance at Mar. 31, 2020		$ 1,977	$ 75,445,289	$ (63,121,962)	$ 12,325,304
Balance (in shares) at Mar. 31, 2020		19,776,019

[1] Includes gross proceeds of $5,984,931, less total issuance costs of $533,189.