CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
OPERATING ACTIVITIES:
Net Income	$ 32,149,300	$ 30,125,500	$ 24,580,500
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	400,100	314,100	355,400
Provision for credit losses	(78,300)	38,600	9,000
Compensation expense related to stock options	1,666,400	1,976,100	1,956,600
Deferred income taxes	(1,815,300)	827,800	(1,370,300)
Gain on sale of marketable securities			(1,400)
Loss from disposal of property and equipment	1,900
Deferred initial direct costs	(92,600)	(1,367,800)	(416,300)
Amortization of deferred initial direct costs	550,000	1,048,500	447,700
Operating lease right of use asset amortization	345,400
Tax benefits on exercised stock options	1,218,900	403,800	882,300
Change in operating assets and liabilities:
Receivables	(116,400)	242,900	(316,800)
Principal collections on lease receivables	19,421,400
Income tax receivable/payable	(1,151,300)	1,192,500	(1,371,300)
Inventories	21,600	(10,500)	(9,600)
Prepaid expenses	(66,500)		242,400
Other assets	(9,900)	(132,200)	(15,500)
Accounts payable	(336,800)	(721,200)	381,000
Accrued and other liabilities	(661,600)	1,490,000	(174,400)
Rents received in advance and security deposits	(197,300)	(358,200)	126,700
Deferred revenue	(601,800)	(132,900)	(98,300)
Net cash provided by operating activities	50,647,200	34,937,000	25,207,700
INVESTING ACTIVITIES:
Proceeds from sale of marketable securities			217,200
Purchase of property and equipment	(169,400)	(693,500)	(72,600)
Purchase of equipment for lease contracts	(9,009,000)	(23,104,800)	(25,403,200)
Principal collections on lease receivables		24,252,200	25,343,800
Net cash provided by (used for) investing activities	(9,178,400)	453,900	85,200
FINANCING ACTIVITIES:
Proceeds from borrowings on line of credit	18,800,000	7,300,000	51,900,000
Payments on line of credit	(18,800,000)	(42,700,000)	(39,900,000)
Proceeds from borrowings on notes payable			12,500,000
Payments on notes payable	(3,250,000)	(3,250,000)	(2,312,500)
Repurchases of common stock	(24,028,100)	(1,846,400)	(49,902,500)
Proceeds from exercises of stock options	10,918,300	2,819,700	2,309,700
Dividends paid	(3,449,100)	(2,169,900)	(1,765,000)
Proceeds from discounted lease rentals	944,400	5,868,500	1,747,700
Net cash used for financing activities	(18,864,500)	(33,978,100)	(25,422,600)
NET INCREASE (DECREASE) IN CASH, CASH EQUIVALENTS AND RESTRICTED CASH	22,604,300	1,412,800	(129,700)
Cash, cash equivalents and restricted cash, beginning of period	2,576,000	1,163,200	1,292,900
Cash, cash equivalents and restricted cash, end of period	$ 25,180,300	$ 2,576,000	$ 1,163,200