Statements of Cash Flows (Unaudited) - USD ($)	6 Months Ended
	Jun. 26, 2021	Jun. 27, 2020
Cash flows from operating activities:
Net income	$ 270,101	$ 900,885
Adjustments to reconcile net income to cash provided by (used in) operating activities:
Depreciation and amortization	284,408	261,688
Share-based compensation	119,535	83,063
Gain on sale of property and equipment		(5,000)
Changes in:
Accounts receivable-trade	(1,517,511)	(888,897)
Inventories	(279,963)	(773,044)
Prepaid expenses and other current assets	(202,018)	(25,451)
Accounts payable	613,046	333,743
Accrued expenses	193,665	93,828
Deferred revenue	388,697	461,887
Net cash provided by (used in) operating activities	(130,040)	442,702
Cash flows from investing activities:
Purchases of property and equipment	(163,524)	(233,270)
Proceeds from sale of property and equipment		5,000
Net cash used in investing activities	(163,524)	(228,270)
Cash flows from financing activities:
Net borrowings on line of credit		(222,823)
Proceeds from exercise of employee stock options, net of repurchases	11,229
Proceeds from issuance of common stock	3,137,392
Payments on note payable	(34,500)	(8,962)
Net cash provided by (used in) financing activities	3,114,121	(231,785)
Net increase (decrease) in cash and cash equivalents	2,820,557	(17,353)
Cash and cash equivalents at beginning of period	195,203	133,965
Cash and cash equivalents at end of period	3,015,760	116,612
Supplemental disclosures of cash flows information:
Cash paid for interest	18,079	65,741
Supplemental disclosures of non-cash activity:
Issuance of note payable to finance equipment purchase		208,583
Net exercise of stock options	$ 24,514