Note 4 - Shareholders' Equity

3 Months Ended

Mar. 31, 2019

Notes to Financial Statements

Stockholders' Equity Note Disclosure [Text Block]

4. Shareholders’ Equity

During the

three

months ended

March 

31,

2019

and

2018,

we repurchased and contemporaneously retired

5,944

and

7,006

shares of our common stock at an aggregate cost of

$21,000

and

$14,000,

respectively, pursuant to the return of stock by holders of equity incentive awards to pay tax withholding obligations.

We had

1,459,233

loaned shares outstanding at

March 

31,

2019

and

December 

31,

2018,

which were originally lent in connection with our

November 2005

issuance of convertible senior notes. We retire lent shares as they are returned to us.