Note 3 - Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2022

Notes Tables

Property, Plant and Equipment, Estimated Useful Lives [Table Text Block]

Asset Classification	Estimated Useful Life
Equipment	5 years
Furniture and fixtures	7 years
Software	5 years
Leasehold improvements	Lesser of estimated useful life or lease term

Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]

	December 31,
	2022		2021
	(000's)
Restricted stock units		900		1,200
Stock options		5,378		3,659
Nonvested restricted stock		193		471
Total		6,471		5,330