Note 20 - Employee Benefit Plans

12 Months Ended

Dec. 31, 2017

Notes to Financial Statements

Pension and Other Postretirement Benefits Disclosure [Text Block]

( 20 ) Employee Benefit Plans

The Company

’s U.S. employees are eligible to participate in a retirement and savings plan that qualifies under Section

401

(k) of the Internal Revenue Code. Participating employees

may

contribute up to

75%

of their pretax salary, but

not

more than statutory limits. The Company did

not

make any matching contributions during the years ended

December 31, 2017,

2016

and

2015,

but

may

elect to do so in the future.