Note 15 - Employee Equity Incentive Plans (Tables)

12 Months Ended

Dec. 31, 2014

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

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

	Number of shares			Weighted average exercise price (per share)		Weighted average remaining contractual term (in years)		Aggregate intrinsic value
Outstanding at December 31, 2012		10,452,500		$	0.36		1.68	$	149,598
Granted		350,000			0.17
Exercised		(100,000	)		0.18
Forfeited/cancelled/expired		(4,957,500	)		0.42
Outstanding at December 31, 2013		5,745,000			0.29		1.70	$	93,945
Granted		150,000			0.16
Exercised		(150,000	)		0.13
Forfeited/cancelled/expired		(2,615,000	)		0.40
Outstanding at December 31, 2014		3,130,000		$	0.20		1.59	$	364,900
Vested and exercisable at December 31, 2014		2,855,000		$	0.21		1.35	$	332,850

Schedule of Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding [Table Text Block]

	Number of options vested		Fair value of options vested
Fair value of options vesting during the year ended December 31, 2014		695,834	$	84,450
Fair value of options vesting during the year ended December 31, 2013		768,833	$	81,391

Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table Text Block]

Awards breakdown by price range at December 31, 2014
			Outstanding						Vested
Strike price range ($)			Outstanding stock options		Weighted average remaining contractual life		Weighted average outstanding strike price		Vested stock options		Weighted average remaining vested contractual life		Weighted average vested strike price
0.00	to	0.20		2,080,000		1.98	$	0.13		1,855,000		1.72	$	0.12
0.21	to	0.29		600,000		0.92		0.24		550,000		0.69		0.25
0.30	to	0.49		-0-		0.00		0.00		-0-		0.00		0.00
0.50	to	0.70		450,000		0.68		0.50		450,000		0.68		0.50
0.00	to	0.70		3,130,000		1.59	$	0.20		2,855,000		1.35	$	0.21

Awards breakdown by price range at December 31, 2013
			Outstanding						Vested
Strike price range ($)			Outstanding stock options		Weighted average remaining contractual life		Weighted average outstanding strike price		Vested stock options		Weighted average remaining vested contractual life		Weighted average vested strike price
0.00	to	0.20		3,251,000		2.16	$	0.15		2,530,166		1.86	$	0.16
0.21	to	0.29		750,000		1.64		0.25		650,000		1.20		0.25
0.30	to	0.49		110,000		0.98		0.38		110,000		0.98		0.38
0.50	to	0.70		1,634,000		0.87		0.59		1,634,000		0.87		0.59
0.00	to	0.70		5,745,000		1.70	$	0.29		4,924,166		1.42	$	0.32

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

	Stock option assumptions for the year ended
Stock option assumptions	December 31, 2014		December 31, 2013
Risk-free interest rate		0.93%		0.58%
Expected dividend yield		0.0%		0.0%
Expected volatility		199.0%		202.7%
Expected life of options (in years)		5		5

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

	Weighted average grant date fair value
	2014		2013
Stock options granted during the year ended December 31,	$	0.16	$	0.17
Stock options vested during the year ended December 31,	$	0.12	$	0.11
Stock options forfeited during the year ended December 31,	$	0.31	$	0.29

Schedule of Nonvested Share Activity [Table Text Block]

	Shares underlying stock options		Weighted average grant date fair value
Nonvested shares at January 1, 2014		820,834	$	0.13
Nonvested shares at December 31, 2014		275,000	$	0.17