Note 5 - Net Gain (Loss) Per Share (Tables)

6 Months Ended

Jun. 30, 2021

Notes Tables

Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]

	Three Months Ended June 30,				Six Months Ended June 30,
	2021		2020		2021		2020
Shares used in basic earnings per share calculation:		40,786		38,614		40,689		38,571
Effect of dilutive securities:		-		-		-		-
Stock options		436		-		-		-
Restricted stock/Deferred stock units		-		-		-		-
Total effects of dilutive securities		436		-		-		-
Shares used in dilutive earnings per share calculation:		41,222		38,614		40,689		38,571

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

	Three Months Ended June 30,				Six Months Ended June 30,
	2021		2020		2021		2020
Anti-dilutive securities:
Stock options		62		1,948		2,114		1,948