Note 6 - Income Taxes

6 Months Ended

Jun. 30, 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

and

six

months ended

June 30, 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.