Note 2 - Summary of Significant Accounting Policies (Tables)

9 Months Ended

Sep. 30, 2016

Notes Tables

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

	201 6				201 5
Dividend yield (1)			0.0%				0.0%
Expected volatility (2)		46.38%	to	52.54%		53.78%	to	56.00%
Risk-free interest rate (3)		1.23%	to	1.82%		1.49%	to	2.00%
Expected life (4) (years)		5.5	to	7.0		5.5	to	7.0
Assumed forfeiture rate			10.0%				19.0%

Schedule of Share-based Compensation, Activity [Table Text Block]

	September 30, 2016		September 30, 2015
Stock based compensation expense recognized	$	764,000	$	441,000
Number of unvested stock options		1,316,476		1,185,151
Fair value of unvested stock options	$	2,608,986	$	1,908,205
Amount remaining to be recognized as expense	$	1,284,071	$	1,034,337

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

	Three Months Ended September 30,				Nine Months Ended September 30,
	2016		2015		2016		2015
Net income (basic and diluted)	$	1,340	$	582	$	3,448	$	1,643
Weighted average shares outstanding		37,916		37,816		37,879		37,816
Net income per share – basic	$	0.04	$	0.02	$	0.09	$	0.04
Weighted average shares outstanding (including dilutive CSEs)		38,375		38,064		38,355		38,052
Net income per share – diluted	$	0.03	$	0.02	$	0.09	$	0.04

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,
	2016		2015		2016		2015
Anti-dilutive securities
Share based compensation awards		2,022		1,735		2,005		1,747
Convertible securities		1,662		1,662		1,662		1,662
Total anti-dilutive securities		3,684		3,397		3,667		3,409