CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 26, 2015	Dec. 27, 2014
OPERATING ACTIVITIES:
Net Income	$ 22,217,600	$ 21,799,700	$ 20,066,500
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	420,500	432,600	412,000
Provision for credit losses	18,500	(149,700)	62,900
Compensation expense related to stock options	1,776,600	1,694,800	1,417,200
Deferred income taxes	(282,900)	(2,142,100)	111,900
Loss (gain) on sale of marketable securities	12,600	22,800	(8,700)
Loss from disposal of property and equipment		100	2,300
Deferred initial direct costs	(535,800)	(416,600)	(850,400)
Amortization of deferred initial direct costs	471,100	587,300	754,400
Tax benefits on exercised stock options	(599,400)	(26,300)	(91,100)
Change in operating assets and liabilities:
Receivables	(62,300)	(88,700)	(122,700)
Restricted cash	(15,000)	(25,000)
Income tax receivable/payable	2,197,100	897,000	(3,886,100)
Inventories	(42,300)	48,300	3,200
Prepaid expenses	(372,900)	(210,400)	119,900
Other assets		70,000
Accounts payable	48,700	(312,200)	(485,900)
Accrued and other liabilities	(253,400)	(147,100)	423,700
Rents received in advance and security deposits	759,900	370,600	(55,900)
Deferred revenue	(96,300)	(105,600)	109,800
Net cash provided by operating activities	25,662,300	22,299,500	17,983,000
INVESTING ACTIVITIES:
Proceeds from sale of marketable securities	52,200	299,000	862,400
Purchase of marketable securities		(75,800)	(637,200)
Purchase of property and equipment	(68,600)	(133,900)	(452,400)
Purchase of equipment for lease contracts	(26,211,100)	(22,192,800)	(27,547,400)
Principal collections on lease receivables	23,006,800	26,603,000	20,724,600
Net cash provided by (used for) investing activities	(3,220,700)	4,499,500	(7,050,000)
FINANCING ACTIVITIES:
Proceeds from borrowings on line of credit	18,800,000	62,300,000	33,900,000
Payments on line of credit	(37,800,000)	(38,400,000)	(15,400,000)
Proceeds from borrowings on notes payable		25,000,000
Payments on notes payable	(2,000,000)	(1,000,000)
Repurchases of common stock	(1,573,900)	(74,853,700)	(11,564,800)
Proceeds from exercises of stock options	1,305,900	273,600	418,000
Dividends paid	(1,526,800)	(1,228,200)	(26,930,200)
Tax benefits on exercised stock options	599,400	26,300	91,100
Net cash used for financing activities	(22,195,400)	(27,882,000)	(19,485,900)
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	246,200	(1,083,000)	(8,552,900)
Cash and cash equivalents, beginning of period	1,006,700	2,089,700	10,642,600
Cash and cash equivalents, end of period	1,252,900	1,006,700	2,089,700
SUPPLEMENTAL DISCLOSURES:
Cash paid for interest	2,296,000	1,492,500	421,200
Cash paid for income taxes	$ 11,801,400	$ 14,647,400	$ 16,229,000