Note 9 - Stockholders' Equity (Tables)

3 Months Ended

Mar. 31, 2021

Notes Tables

Schedule of Stockholders' Equity Note, Warrants or Rights [Table Text Block]

	Warrant shares outstanding			Weighted Average exercise price		Weighted Average remaining life		Intrinsic value
Outstanding at January 1, 2021		6,369,396		$	1.49	$	2.48	$	2,784,117
Issued		-
Exercised		(1,918,925	)		1.57		-		4,044,164
Expired or cancelled		-			-		-		-
Outstanding and exercisable at March 31, 2021		4,450,471		$	2.14	$	2.26	$	6,381,930

	Warrant shares outstanding			Weighted Average exercise price		Weighted Average remaining life		Intrinsic value
Outstanding at January 1, 2020		1,074,171		$	0.50	$	4.10	$	956,012
Issued		-			-		-
Exercised		(460,725	)		0.50		-		630,389
Expired or cancelled		-			-		-		-
Outstanding and exercisable at March 31, 2020		613,446		$	0.50	$	3.85	$	460,085

Deferred Compensation Arrangement with Individual, Share-based Payments [Table Text Block]

	March 31, 2021			March 31, 2020
Shares-to-be-issued, outstanding January 1, 2021 and 2020, respectively		2,440,878			2,375,760
Granted in current period		33,238			102,768
Issued in current period		(65,965	)		(11,995	)
Shares-to be issued outstanding March 31, 2021 and 2020, respectively		2,408,151			2,466,533

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

	Number of Options	Weighted Averaged Exercise Price $		Weighted Average Remaining Contractual Life (Years)		Aggregate Intrinsic Options Value $
Options outstanding January 1, 2021	1,953,443		1.88		3.09		476,964
Granted	32,175		3.11		-		-
Exercised during 2021	-		-		-		-
Forfeited or expired	(435,558)		1.58		-		-
Options outstanding March 31, 2021	1,550,060		1.98		3.62		2,457,153
Exercisable, March 31, 2021	745,045		1.93		2.60		1,222,127

	Number of Options	Weighted Averaged Exercise Price $		Weighted Average Remaining Contractual Life (Years)		Aggregate Intrinsic Options Value $
Options outstanding January 1, 2020	1,212,442		1.71		2.40		-
Granted	-		-		-		-
Exercised during 2020	-		-		-		-
Forfeited or expired	-		-		-		-
Options outstanding March 31, 2020	1,212,442		1.71		2.40		-
Exercisable, March 31, 2020	1,117,829		1.84		1.84		-

	Number of Options	Weighted Averaged Exercise Price $		Weighted Average Remaining Contractual Life (Years)		Aggregate Intrinsic Options Value $
Options outstanding January 1, 2021	74,997		1.41		3.18		54,748
Granted	16,666		4.30
Exercised during 2021	-		-		-		-
Options outstanding March 31, 2021	91,663		1.87		3.30		161,660
Exercisable, March 31, 2021	52,769		1.34		2.37		117,829

	Number of Options	Weighted Averaged Exercise Price $		Weighted Average Remaining Contractual Life (Years)		Aggregate Intrinsic Options Value $
Options outstanding January 1, 2020	49,998		1.87		2.94		-
Granted	8,333		1.65				-
Exercised during 2020	-		-		-		-
Options outstanding March 31, 2020	58,331		1.87		2.94
Exercisable, March 31, 2020	41,663		1.71		2.03		84,579