Note 8 - Stock Warrants (Tables)

3 Months Ended

Mar. 31, 2018

Disclosure Text Block Supplement [Abstract]

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

A summary of warrants issued, exercised and expired are as follows:

	Shares		Weighted- Average Exercise Price ($)		Weighted- Average Remaining Contractual Term
Outstanding at December 31, 2017		142,653	$	17.42		1.25
Granted		—		—		—
Expired		—		—		—

Outstanding at March 31, 2018		142,653	$	17.42		1.00

Exercisable at March 31, 2018		142,653	$	17.42		1.00

- Definition

Tabular disclosure of warrants or rights issued. Warrants and rights outstanding are derivative securities that give the holder the right to purchase securities (usually equity) from the issuer at a specific price within a certain time frame. Warrants are often included in a new debt issue to entice investors by a higher return potential. The main difference between warrants and call options is that warrants are issued and guaranteed by the company, whereas options are exchange instruments and are not issued by the company. Also, the lifetime of a warrant is often measured in years, while the lifetime of a typical option is measured in months. Disclose the title of issue of securities called for by warrants and rights outstanding, the aggregate amount of securities called for by warrants and rights outstanding, the date from which the warrants or rights are exercisable, and the price at which the warrant or right is exercisable.

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