Note 7 - Letters of Credit

12 Months Ended

Dec. 31, 2018

Notes to Financial Statements

Letters of Credit Disclosure [Text Block]

NOTE

7

– LETTERS OF CREDIT

As of

December 31, 2018

and

2017,

the Company had

$1.2

 million in letters of credit outstanding with financial institutions. The annual fee for letters of credit is

1%

of the outstanding balance. The letters of credit are secured by a certificate of deposit maintained at the financial institutions and that mature in

September 2019.