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CASH, CASH EQUIVALENTS AND INVESTMENTS
 12 Months Ended
Dec. 31, 2018
Cash And Cash Equivalents [Abstract]  
CASH, CASH EQUIVALENTS AND INVESTMENTS

4.

CASH, CASH EQUIVALENTS AND INVESTMENTS:

The Company considers all highly liquid debt instruments purchased with an original maturity of three months or less to be cash equivalents. The Company classifies its remaining investments as available-for-sale. These debt securities are carried at fair market value, with unrealized gains and losses reported in shareholders’ equity. Gains or losses on securities sold are based on the specific identification method. Investments as of December 31, 2018 and December 31, 2017 consisted of the following (in thousands):

 

 

 

Amortized

 

 

Unrealized

 

 

Aggregate Fair

 

Investment Classification

 

Cost

 

 

Gains

 

 

(Losses)

 

 

Market Value

 

December 31, 2018

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Certificates of deposit

 

$

500

 

 

$

—

 

 

$

(1

)

 

$

499

 

Corporate bonds

 

 

114,678

 

 

 

1

 

 

 

(19

)

 

 

114,660

 

U.S. Government bonds

 

 

317,984

 

 

 

14

 

 

 

(43

)

 

 

317,955

 

 

 

$

433,162

 

 

$

15

 

 

$

(63

)

 

$

433,114

 

December 31, 2017

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Certificates of deposit

 

$

1,296

 

 

$

1

 

 

$

(1

)

 

$

1,296

 

Corporate bonds

 

 

104,626

 

 

 

—

 

 

 

(252

)

 

 

104,374

 

U.S. Government bonds

 

 

214,641

 

 

 

—

 

 

 

(139

)

 

 

214,502

 

 

 

$

320,563

 

 

$

1

 

 

$

(392

)

 

$

320,172

 

 

As of December 31, 2018 and 2017, there was none and $17.9 million of corporate bonds, respectively, and $128.8 million and none of U.S. government securities, respectively, included in cash equivalents on the consolidated balance sheet.