Note 10 - Shareholders' Equity (Tables)

12 Months Ended

Dec. 31, 2016

Notes Tables

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

				Weighted
				Average
				Exercise Price
	Shares			Per Option
Options outstanding, December 31, 2014		580,000		$	1.58
Granted to non-employee directors		120,000			1.58
Exercised		(475,000	)		1.61
Canceled/expired/forfeited		-			-
Options outstanding, December 31, 2015		225,000			1.52
Granted to non-employee directors		45,000			3.45
Granted to employees		810,000			2.12
Exercised		(15,000	)		1.15
Canceled/expired/forfeited		-			-
Options outstanding, December 31, 2016		1,065,000			2.06
Options exercisable, December 31, 2016		130,000			1.53

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

	Stock Options
	For the Years Ended December 31,
	2016			2015
Exercise price	$	2.19		$	1.58
Risk-free interest rate		1.13	%		1.69	%
Expected volatility		59.16	%		59.20	%
Expected life in years		4.25			4.25
Dividend rate		-			-
Black-Scholes fair value	$	1.03		$	0.75

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

			Options Outstanding								Options Exercisable
Range of Exercise Prices			Options		Weighted Average Exercise Price		Weighted Average Remaining Contract Life (in years)		Aggregate Intrinsic Value		Options		Weighted Average Exercise Price		Weighted Average Remaining Contract Life (in years)		Aggregate Intrinsic Value
$1.51	-	$3.45		1,065,000	$	2.06		4.2	$	1,530,000		130,000	$	1.53		2.4	$	256,000