Condensed Consolidated Statements of Operations and Comprehensive Loss - USD ($)	3 Months Ended	9 Months Ended
Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Revenues:
License revenue	$ 164,990	$ 0	$ 164,990	$ 428,031
Total revenues	164,990	0	164,990	428,031
Operating expenses:
Research and development	1,713,417	1,422,919	5,626,883	4,282,823
General and administrative	1,427,261	930,137	3,989,645	4,299,659
Total operating expenses	3,140,678	2,353,056	9,616,528	8,582,482
Operating loss	(2,975,688)	(2,353,056)	(9,451,538)	(8,154,451)
Other income (expense):
Interest and investment income	98,988	112,561	348,833	343,145
Interest expense	(183,500)	(218,577)	(611,864)	(622,537)
Total other expense, net	(84,512)	(106,016)	(263,031)	(279,392)
Loss before income tax expense	(3,060,200)	(2,459,072)	(9,714,569)	(8,433,843)
Income tax expense	0	0	(700)	(700)
Net loss	$ (3,060,200)	$ (2,459,072)	$ (9,715,269)	$ (8,434,543)
Basic loss per share attributable to common stock	$ (0.12)	$ (0.12)	$ (0.40)	$ (0.40)
Weighted average common shares outstanding, basic	24,911,908	21,266,639	24,301,045	21,265,247
Diluted loss per share attributable to common stock	$ (0.12)	$ (0.12)	$ (0.40)	$ (0.40)
Weighted average common shares outstanding, diluted	24,911,908	21,266,639	24,301,045	21,265,247
Comprehensive loss:
Net loss	$ (3,060,200)	$ (2,459,072)	$ (9,715,269)	$ (8,434,543)
Net unrealized gain (loss) on marketable investment securities	(2,656)	7,755	1,224	763
Comprehensive loss	$ (3,062,856)	$ (2,451,317)	$ (9,714,045)	$ (8,433,780)

Revenue from multiple-deliverable arrangements that include licensing fees and services revenue. Licensing revenue is consideration received from another party for the right to use, but not own, certain of the entity's intangible assets. Licensing arrangements include, but are not limited to, rights to use a patent, copyright, technology, manufacturing process, software or trademark. Licensing fees are generally, but not always, fixed as to amount and not dependent upon the revenue generated by the licensing party. An entity may receive licensing fees for licenses that also generate royalty payments to the entity. Services revenue may be derived by providing other, non-specified, services during the reporting period.

No definition available.