Note 2 - Investments and Restricted Cash

3 Months Ended

Mar. 31, 2017

Notes to Financial Statements

Investments and Restricted Cash Disclosure [Text Block]

Note

2.

    Investments and Restricted Cash

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

$36.5

million and

$29.1

million, respectively, at

March

 

31,

2017

and

December

 

31,

2016.

During the

first

quarter of

2017,

we had purchases of such investments of

$11.1

million and maturities of

$3.6

million. We held

no

such investments during the

first

quarter of

2016.

Our current investments at

March

 

31,

2017

and

December

 

31,

2016

consisted of the following:

	March 31, 2017							December 31, 2016
	Amortized cost		Unrealized loss			Fair market value		Amortized cost		Unrealized loss			Fair market value
Corporate bonds	$	30,077	$	(38	)	$	30,039	$	22,100	$	(46	)	$	22,054
Municipal bonds		3,138		—			3,138		3,727		(1	)		3,726
Agency bonds		3,331		(3	)		3,328		3,339		(2	)		3,337
Total	$	36,546	$	(41	)	$	36,505	$	29,166	$	(49	)	$	29,117

At

March

 

31,

2017

and

December

 

31,

2016,

the fair value of our non-current investments was

$5.1

million and

$5.0

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

$3.9

million and

$4.1

million, respectively, at

March

 

31,

2017

and

December

 

31,

2016.

In the

first

quarter of

2016,

we recognized total impairment charges against earnings of

$1.0

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