Note 9 - Stock-based Payments for Compensation, Services and Royalties

3 Months Ended

Mar. 31, 2019

Notes to Financial Statements

Share-based Payment Arrangement [Text Block]

9.

STOCK-BASED PAYMENTS FOR COMPENSATION, SERVICES AND ROYALTIES

The Company records its stock-based compensation expense on options issued in the past under its stock option plans and the Company also issues stock for services and royalties. The Company's stock option plans expired in

2018

and there are

no

immediate plans to issue stock options. A detailed description of the awards under these plans and the respective accounting treatment is included in the “Notes to the Consolidated Financial Statements” included in the Company’s Annual Report on Form

10

-K for the year ended

December 

31,

2018

and filed with the SEC on

March 18, 2019.

For the

three

months ended

March 

31,

2019

and

2018

the Company recorded stock-based expense of

$51

thousand and

$66

thousand, respectively.