Note 12 - Earnings Per Share (Tables)

3 Months Ended

Mar. 31, 2019

Notes Tables

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

	Three Months Ended March 31,
	2019		2018
Common stock options		1,127,625		1,276,719
Unvested restricted stock units and market value stock units		2,808,654		2,720,952
Convertible debt		10,830,038		10,830,038
		14,766,317		14,827,709