Note 8 - Stockholders' Equity (Tables)

3 Months Ended

Mar. 31, 2019

Notes Tables

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

		Warrants Outstanding						Warrants Exercisable
Exercise Prices		Number Outstanding		Weighted Average Remaining Contractual Life (years)		Weighted Average Exercise Price		Number Exercisable		Weighted Average Exercise Price
$	6.60		100,000		0.32	$	6.60		100,000	$	6.60
Total			100,000		0.32	$	6.60		100,000	$	6.60

Share-based Payment Arrangement, Option, Exercise Price Range [Table Text Block]

		Options Outstanding						Options Exercisable
Exercise Prices		Number Outstanding		Weighted Average Remaining Contractual Life (years)		Weighted Average Exercise Price		Number Exercisable		Weighted Average Exercise Price
$	2.96		25,000		1.37	$	2.96		25,000	$	2.96
Total			25,000		1.37	$	2.96		25,000	$	2.96

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

	Shares			Weighted Average Exercise Price		Average Remaining Life		Weighted Average Intrinsic Value
Outstanding at beginning of period		70,000		$	2.96		1.62	$	-
Granted		-			-		-		-
Exercised		(45,000	)		-		-		-
Forfeited		-			-		-		-
Expired		-			-		-		-
Outstanding at end of period		25,000		$	2.96		1.37	$	-
Vested and expected to vest		25,000		$	2.96		1.37	$	-
Exercisable end of period		25,000		$	2.96		1.37	$	-