Statements of Cash Flows (Unaudited) - USD ($)	9 Months Ended
	Sep. 26, 2020	Sep. 28, 2019
Cash flows from operating activities:
Net income	$ 1,131,901	$ (989,586)
Adjustments to reconcile net income (loss) to cash provided by (used in) operating activities
Depreciation & amortization	382,121	391,156
Share-based compensation	100,452	115,647
Deferred taxes	33,620
Gain on sale of property and equipment	(5,000)
Changes in:
Accounts receivable-trade	125,339	257,348
Inventories	(1,087,448)	401,822
Prepaid expenses	(25,797)	(16,982)
Accounts payable	(214,775)	(206,204)
Deferred revenue	336,890
Accrued expenses	(94,984)	(274,325)
Net cash provided by (used in) operating activities	682,319	(321,124)
Cash flows from investing activities:
Purchases of property and equipment	(285,909)	(250,128)
Proceeds from sale of property and equipment	5,000
Net cash provided by (used in) investing activities	(280,909)	(250,128)
Cash flows from financing activities:
Net borrowings on line of credit	(414,465)	412,732
Net proceeds from employee stock options
Payments on note payable	(9,103)
Net cash provided by (used in) financing activities	(422,800)	412,732
Net increase (decrease) in cash and cash equivalents	(21,390)	(158,520)
Cash and cash equivalents at beginning of period	133,965	628,804
Cash and cash equivalents at end of period	112,575	470,284
Supplemental disclosures of cash flows information:
Cash paid for income taxes		485
Cash paid for interest	87,004
Supplemental disclosures of non-cash activity:
Net exercise of stock options	441,022
Issuance of long term debt to finance equipment purchases	$ 247,807