Note 9 - Subsequent Events

3 Months Ended

Mar. 31, 2017

Notes to Financial Statements

Subsequent Events [Text Block]

9. Subsequent Events

The Company has evaluated all activity that occurred subsequent to quarter end but prior to issuance of the unaudited condensed consolidated financial statements for events or transactions that could require disclosure or that could impact the carrying value of assets or liabilities as of the balance sheet date.

On

May

2,

2017,

the Company announced that planned enrollment for the PATENCY-

2

trial has increased from

500

to

600

patients. The Company expects to complete enrollment for the PATENCY-

2

trial in the

first

quarter of

2018

and to report top-line data in the

first

quarter of

2019.