Note 2 - Summary of Significant Accounting Policies (Tables)

9 Months Ended

Sep. 30, 2015

Accounting Policies [Abstract]

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

	2015			2014
Dividend yield(1)		0.0%			0.0%
Expected volatility(2)	53.78%	to	56.00%	55.79%	to	57.99%
Risk-free interest rate(3)	1.49%	to	2.00%	1.51%	to	2.26%
Expected life(4) (years)	5.5	to	7.0	5.5	to	7.0

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

	2015		2014
Stock based compensation expense recognized	$	441,000	$	309,000
Number of unvested stock options		1,185,151		1,050,513
Fair value of unvested stock options	$	1,908,205	$	1,552,934
Amount remaining to be recognized as expense	$	1,034,337	$	812,979

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

	Three Months Ended September 30,				Nine Months Ended September 30,
	2015		2014		2015		2014
Net income (basic and diluted)	$	582	$	297	$	1,643	$	1,589
Weighted average shares outstanding		37,816		37,815		37,816		33,025
Net income per share – basic	$	0.02	$	0.01	$	0.04	$	0.05
Weighted average shares outstanding (including dilutive CSEs)		38,064		38,253		38,052		33,399
Net income per share – diluted	$	0.02	$	0.01	$	0.04	$	0.05