Financial Instruments (Tables)

12 Months Ended

Dec. 30, 2017

Financial Instruments [Abstract]

Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation

Changes in Level 3 investments are as follows:

	December 31, 2016		Net unrealized gains/(losses)		Purchases, issuances and settlements		Transfers in and or out of Level 3		December 30, 2017
Warrant	$	—	$	2,000,000	$	—	$	—	$	2,000,000
	$	—	$	2,000,000	$	—	$	—	$	2,000,000

Fair Value, by Balance Sheet Grouping

The following table details the fair value measurements of the Company’s financial assets:

			Fair Value Measurement at December 30, 2017 Using:
	Total		Level 1		Level 2		Level 3
Cash and cash equivalents	$	24,848,227	$	24,848,227	$	—	$	—
U.S. government and agency backed securities	34,725,811		6,927,323		27,798,488		—
Corporate debt	8,980,906		—		8,980,906		—
Certificates of deposit	200,740		—		200,740		—
GCS Holdings	478,546		478,546		—		—
Warrant	2,000,000		—		—		2,000,000
	$	71,234,230	$	32,254,096	$	36,980,134	$	2,000,000

			Fair Value Measurement at December 31, 2016 Using:
	Total		Level 1		Level 2		Level 3
Cash and cash equivalents	$	15,822,495	$	15,822,495	$	—	$	—
U.S. government and agency backed securities	36,091,261		7,144,767		28,946,494		—
Corporate debt	7,557,029		—		7,557,029		—
Certificates of deposit	17,727,111		—		17,727,111		—
GCS Holdings	331,454		331,454		—		—
	$	77,529,350	$	23,298,716	$	54,230,634	$	—

Available-for-sale Securities

Investments in available-for-sale marketable debt securities are as follows at December 30, 2017 and December 31, 2016:

	Amortized Cost				Unrealized Gains				Unrealized Losses						Fair Value
	2017		2016		2017		2016		2017			2016			2017		2016
U.S. government and agency backed securities	$	35,014,593	$	36,343,817	$	—	$	—	$	(288,782	)	$	(252,556	)	$	34,725,811	$	36,091,261
Corporate debt	8,988,608		7,596,755		—		—		(7,702		)	(39,727		)	8,980,906		7,557,028
Certificates of deposits	201,000		17,726,673		—		439		(260		)	—			200,740		17,727,112
Total	$	44,204,201	$	61,667,245	$	—	$	439	$	(296,744	)	$	(292,283	)	$	43,907,457	$	61,375,401

Investments Classified by Contractual Maturity Date

The contractual maturity of the Company’s marketable debt securities is as follows at December 30, 2017:

	Less than One year		One to Five years		Greater than Five years		Total
U.S. government and agency backed securities	$	20,390,246	$	12,411,125	$	1,924,440	$	34,725,811
Corporate debt	1,715,720		7,265,186		—		8,980,906
Certificates of deposits	200,740		—		—		200,740
Total	$	22,306,706	$	19,676,311	$	1,924,440	$	43,907,457