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CASH AND EQUIVALENTS AND MARKETABLE SECURITIES (Details) - USD ($)	Sep. 29, 2018	Dec. 30, 2017
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 27,249,336	$ 44,204,201
Unrealized Losses	(413,368)	(296,744)
Fair Value	26,835,968	43,907,457
Debt Securities, Available-for-sale, Fair Value, Fiscal Year Maturity [Abstract]
Less than one year	9,436,702
One to five years	17,399,266
Greater than five years	0
Available-for-sale Securities	26,835,968
U.S. government and agency backed securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	16,070,511	35,014,593
Unrealized Losses	(414,404)	(288,782)
Fair Value	15,656,107
Debt Securities, Available-for-sale, Fair Value, Fiscal Year Maturity [Abstract]
Less than one year	6,223,207
One to five years	9,432,900
Greater than five years	0
Available-for-sale Securities	15,656,107	34,725,811
Corporate Debt Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	11,178,825	8,988,608
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	1,036
Unrealized Losses		(7,702)
Fair Value	11,179,861	8,980,906
Debt Securities, Available-for-sale, Fair Value, Fiscal Year Maturity [Abstract]
Less than one year	3,213,495
One to five years	7,966,366
Greater than five years	0
Available-for-sale Securities	11,179,861
Certificates of Deposit [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	0	201,000
Unrealized Losses	0	(260)
Fair Value	$ 0	$ 200,740

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