Note 3 - Investments

12 Months Ended

Dec. 31, 2018

Notes to Financial Statements

Investments and Restricted Cash Disclosure [Text Block]

Note

3.

Investments

Investments

Our current investments, which are classified as "available for sale" and consist of bonds having maturities of greater than

90

days, were

$33.8

million at

December 

31,

2017.

We held

no

such investments as of

December 

31,

2018.

During

2018

and

2017,

we had purchases of such investments of

$31.2

million and

$55.0

million, respectively, and maturities of

$64.9

million and

$50.0

million, respectively. Our current investments at

December 

31,

2017

consisted of the following (in thousands):

	December 31, 2017
	Amortized cost		Unrealized loss			Fair market value
Corporate bonds	$	33,778	$	(20	)	$	33,758

At

December 

31,

2018

and

2017,

the fair value of our non-current investments was

$6.6

million and

$7.6

million, respectively.  Our non-current investments consist of marketable equity securities which are carried at fair value. The cost basis of our non-current investments was approximately

$7.7

million and

$5.7

million at

December 

31,

2018

and

2017,

respectively. In

2018

and

2017,

we acquired marketable equity securities having a cost basis of

$2.4

million and

$1.6

million, respectively. During

2018,

we recognized

$2.8

million in net unrealized losses in current earnings. During

2017,

we recognized

$2.1

million in net unrealized gains in other comprehensive income and

$0.2

million in net unrealized losses in current earnings.