Note 3 - Stockholders' Equity (Tables)

9 Months Ended

Sep. 30, 2019

Notes Tables

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

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2019		2018		2019		2018
Basic and diluted		19,191,848		19,102,889		19,172,772		19,084,242
Potentially dilutive		2,500		27,500		8,382		27,500