Note 6 - Stockholders' Equity

3 Months Ended

Mar. 31, 2019

Notes to Financial Statements

Stockholders' Equity Note Disclosure [Text Block]

Note

6

— Stockholders’ Equity

On

November 8, 2017,

the Company filed a

$200,000

shelf registration statement on Form S-

3

with the SEC. This shelf registration statement became effective on

December 12, 2017

and allows the Company to sell securities, including common stock, preferred stock, depository shares, stock purchase contracts, warrants and units, from time to time at prices and on terms to be determined at the time of sale. 

On

August 6, 2018,

the Company completed an underwritten public offering of

10,455

shares of its common stock, offered at a price to the public of

$5.50

per share, including shares issued pursuant to the underwriters’

30

-day option to purchase additional shares, which was exercised in full. The net proceeds from this offering to the Company were approximately

$53,400

after deducting underwriting discounts and commissions and estimated offering expenses.