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CASH AND EQUIVALENTS AND MARKETABLE SECURITIES (Tables)
 9 Months Ended
Sep. 29, 2018
Cash and Equivalents and Marketable Securities Disclosure [Abstract]  
Cash Cash Equivalents and Marketable Securities Table
Investments in available-for-sale marketable debt securities were as follows at September 29, 2018 and December 30, 2017:
 
Amortized Cost

Unrealized (Losses) Gains

Fair Value
 
2018

2017

2018

2017

2018

2017
U.S. government and agency backed securities
$
16,070,511


$
35,014,593


$
(414,404
)

$
(288,782
)

$
15,656,107


$
34,725,811

Corporate debt
11,178,825

 
8,988,608

 
1,036

 
(7,702
)
 
11,179,861

 
8,980,906

Certificates of deposit
—


201,000


—


(260
)

—


200,740

Total
$
27,249,336

 
$
44,204,201

 
$
(413,368
)
 
$
(296,744
)
 
$
26,835,968

 
$
43,907,457
Marketable Debt Securities
The contractual maturity of the Company’s marketable debt securities was as follows at September 29, 2018:
 
Less than
One year
 
One to
Five years
 
Greater than
Five years
 
Total
U.S. government and agency backed securities
$
6,223,207

 
$
9,432,900

 
$
—

 
$
15,656,107

Corporate debt
3,213,495

 
7,966,366

 
—

 
11,179,861

Total
$
9,436,702

 
$
17,399,266

 
$
—

 
$
26,835,968