Note 2 - Investments

12 Months Ended

Dec. 31, 2016

Notes to Financial Statements

Investments and Restricted Cash Disclosure [Text Block]

Note

2.

Investments

Investments

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

90

days and less than

365

days, had a fair value of

$29.1

million at

December

 

31,

2016.

During

2016,

we had purchases of such investments of

$48.0

million and maturities of

$18.6

million. We held

no

such investments as of

December

 

31,

2015.

Our current investments at

December

 

31,

2016

consist of the following:

	Amortized cost		Unrealized loss			Fair market value
Corporate bonds	$	22,100	$	(46	)	$	22,054
Municipal bonds		3,727		(1	)		3,726
Agency bonds		3,339		(2	)		3,337
Total	$	29,166	$	(49	)	$	29,117

At

December

 

31,

2016

and

2015,

the fair value of our non-current investments was

$5.0

million and

$1.5

million, respectively.  Our non-current investments consist of marketable equity securities which are carried at fair value, and are primarily classified as “available-for-sale.” The cost basis of our non-current investments was approximately

$4.1

million and

$4.0

million at

December

 

31,

2016

and

2015,

respectively. In each of

2016

and

2015,

we acquired marketable equity securities having a cost basis of

$0.9

million. In

2016

and

2015,

we recognized impairment charges against current earnings of

$1.0

million and

$2.5

million, respectively, as we determined the impairments to be other-than-temporary.