Note 10 - Share Based Payments (Tables)

12 Months Ended

Dec. 31, 2019

Notes Tables

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

Black-Scholes-Merton
	2019			2018
Volatility		171	%		174	%
Expected life of options (in years)		5			5
Risk-free interest rate		1.74	%		2.50	%
Dividend yield		0	%		0	%

Share-based Payment Arrangement, Option, Activity [Table Text Block]

							Weighted Average
	Number			Weighted			Remaining		Aggregate
	Of			Average			Contractual		Intrinsic
	Shares			Exercise Price			Life (years)		Value*
Shares under option, January 1, 2018		2,461,000		$	0.15			-	$	-
Options granted		250,000		$	0.49
Options exercised		(90,000	)	$	0.10
Options cancelled and expired		(49,000	)	$	(0.37	)
Shares under option, December 31, 2018		2,572,000		$	0.18			8.66
Options granted		250,000		$	0.80
Options exercised		(604,000	)	$	0.10
Options cancelled and expired		(44,000	)	$	(0.10	)
Shares under option, December 31, 2019		2,174,000		$	0.27			7.02	$	2,947

Schedule of Nonvested Share Activity [Table Text Block]

				Weighted
	Number of			Average
	Shares			Fair Value
Non-vested stock options at January 1, 2018		2,137,000		$	0.13
Options granted		250,000		$	0.47
Vested during period		(1,231,000	)	$	(0.13	)
Options cancelled		(17,500	)	$	(0.13	)
Non-vested shares under option, December 31, 2018		1,138,500		$	0.20
Options granted		250,000		$	0.80
Vested during period		(971,833	)	$	(0.16	)
Options cancelled		-		$	-
Non-vested shares under option, December 31, 2019		416,667		$	0.67

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

			Weighted Average		Weighted
			Remaining		Average		Aggregate
			Contractual		Exercise		Intrinsic
	Options		Life (years)		Price		Value
Stock options exercisable		1,757,3330		6.60	$	0.18	$	2,550
Stock options expected to vest		416,667		9.13	$	0.68	$	397
Options exercisable and expected to vest		2,174,000

Share-based Payment Arrangement, Restricted Stock Unit, Activity [Table Text Block]

				Weighted Average
	Number of			Grant Date
	Shares			Fair Value
Unvested January 1, 2018		30,000		$	0.15
Granted restricted stock		827,000		$	0.49
Cancelled restricted stock		(30,000	)	$	(0.15	)
Vested restricted stock		-		$	-
Unvested December 31, 2018		827,000		$	0.49
Granted restricted stock		554,000		$	0.88
Cancelled restricted stock		(34,500	)	$	(0.76	)
Vested restricted stock		(390,000	)	$	(0.47	)
Unvested December 31, 2019		971,500		$	0.72