Note 2 - Summary of Significant Accounting Policies (Tables)

9 Months Ended

Sep. 30, 2018

Notes Tables

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

	201 8			201 7
Dividend yield (1)		0.0%			0.0%
Expected volatility		28.22%	(2)		45.46% to 50.09%	(3)
Risk-free interest rate (4)		2.35% to 2.96%			1.89% to 2.26%
Expected life (5)		6.25 years			5.5 to 7.0
Assumed forfeiture rate (6)		4.0%			6.0%

Share-based Compensation, Activity [Table Text Block]

	201 8		201 7
Stock based compensation expense recognized	$	1,584,000	$	1,329,000
Number of unvested stock options		1,936,163		1,658,602
Fair value of unvested stock options	$	5,499,104	$	4,553,854
Amount remaining to be recognized as expense	$	3,886,278	$	2,966,049

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

	Three Months Ended September 30,				Nine Months Ended September 30,
	2018		2017		2018		2017
Net income (basic and diluted)	$	2,322	$	2,321	$	6,470	$	6,167
Weighted average shares outstanding		58,774		56,974		58,213		56,915
Net income per share – basic	$	0.04	$	0.04	$	0.11	$	0.11
Weighted average shares outstanding (including dilutive CSEs)		59,774		58,314		59,338		58,213
Net income per share – diluted	$	0.04	$	0.04	$	0.11	$	0.11

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

(in thousands)	Three Months Ended September 30,				Nine Months Ended September 30,
	2018		2017		2018		2017
Anti-dilutive securities
Share based compensation awards		2,845		1,698		2,720		1,740
Convertible securities		-		1,625		-		1,625
Total anti-dilutive securities		2,845		3,323		2,720		3,365