Note 6 - Income Taxes

3 Months Ended

Mar. 31, 2019

Notes to Financial Statements

Income Tax Disclosure [Text Block]

6. Income taxes

There is

no

provision for income taxes because the Company and its subsidiaries were in a cumulative loss position for the

three

months ended

March 31, 2018

and

2019.

The Company recorded a full valuation allowance against deferred tax assets for all periods presented.

No

material unrecognized tax benefits and related interest and penalties were recorded in any of the periods presented.