Note 6 - Revenue From Contracts with Customers (Tables)

12 Months Ended

Dec. 31, 2019

Notes Tables

Disaggregation of Revenue [Table Text Block]

	2019 Revenue Recognized From
	Non-Refundable Payments				Research and
			Up front		Development
	Milestones		Payments		Services		Total
GSK Inhaled	$	1,345,320	$	6,726,600	$	—	$	8,071,920
Other		—		—		200		200
Total	$	1,345,320	$	6,726,600	$	200	$	8,072,120

	2018 Revenue Recognized From
	Non-Refundable Payments				Research and
			Up front		Development
	Milestones		Payments		Services		Total
GSK Inhaled	$	45,058	$	225,293	$	168,000	$	438,351
Other		—		943,419		1,325,211		2,268,630
Total	$	45,058	$	1,168,712	$	1,493,211	$	2,706,981