Note 12 - Share-Based Payments (Tables)

3 Months Ended

Mar. 31, 2013

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

	Three months ended March 31, 2013				Three months ended March 31, 2012
	Number of Shares		Weighted Average exercise price per share		Number of Shares		Weighted Average exercise price per share
Outstanding, beginning of period		8,592,686	$	0.64		8,746,041	$	0.57
Granted		150,000		1.44		45,000		1.05
Exercised		(56,857)		0.68		(294,217)		0.44
Forfeited		(13,813)		1.06		(38,125)		0.84
Expired		—		—		—		—
Outstanding, end of period		8,672,016	$	0.65		8,458,699	$	0.57
Options exercisable, end of period		7,044,598	$	0.57		6,746,199	$	0.54

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

			Options outstanding								Options exercisable
Exercise price			Outstanding Number		Weighted average exercise price per share		Weighted Average remaining contractual life (years)		Aggregate intrinsic value		Number exercisable		Weighted average exercise price per share		Aggregate intrinsic value
$0.31	-	$0.48		3,113,904	$	0.38		0.4	$	4,187,302		3,113,904	$	0.38	$	4,187,302
$0.56	-	$0.94		4,650,112	$	0.69		2.7		4,773,988		3,689,444	$	0.69		3,803,637
$1.05	-	$1.44		908,000	$	1.37		5.8		317,170		241,250	$	1.35		88,337
				8,672,016	$	0.65		2.2	$	9,278,460		7,044,598	$	0.57	$	8,079,276