CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Revenues:
Revenue, product and service [extensible list]	us-gaap:ServiceMember	us-gaap:ServiceMember	us-gaap:ServiceMember	us-gaap:ServiceMember
Research and development revenue	$ 524,271	$ 390,874	$ 839,643	$ 793,401
Costs and expenses:
Costs of research and development revenue	624,240	322,228	902,422	650,131
Provision for contract losses	74,955	0	74,955	0
Research and development	1,116,163	818,240	1,871,616	1,510,610
Research and development - related party	0	336,310	0	725,783
General and administrative	1,475,232	1,870,678	3,128,624	3,298,745
Foreign currency exchange loss (gain), net	31,690	4,932	42,557	10,966
Total costs and expenses	3,322,280	3,352,388	6,020,174	6,196,235
Loss from operations	(2,798,009)	(2,961,514)	(5,180,531)	(5,402,834)
Interest income	146,587	265,722	314,970	532,684
Loss before income taxes	(2,651,422)	(2,695,792)	(4,865,561)	(4,870,150)
Provision for income taxes	0	0	0	900
Net loss	$ (2,651,422)	$ (2,695,792)	$ (4,865,561)	$ (4,871,050)
Basic and diluted net loss per common share (USD per share)	$ (0.10)	$ (0.10)	$ (0.18)	$ (0.18)
Basic and diluted weighted-average common shares outstanding (in shares)	27,467,366	26,828,754	27,459,415	26,771,439