Statements of Cash Flows (Unaudited) - USD ($)	6 Months Ended
	Jun. 29, 2019	Jun. 30, 2018
Cash flows from operating activities:
Net loss	$ (493,615)	$ (831,547)
Adjustments to reconcile net loss to cash provided by (used in) operating activities:
Depreciation and amortization	278,369	284,209
Share-based compensation	87,647	103,029
Deferred taxes		(270,000)
Changes in:
Accounts receivable-trade	(1,057,298)	(497,231)
Inventories	292,034	(1,652,830)
Prepaid expenses and other current assets	(64,304)	(1,338)
Accounts payable	4,819	1,064,654
Deferred revenue		(100,000)
Accrued expenses	(148,844)	331,799
Net cash provided by (used in) operating activities	(1,101,192)	(1,569,255)
Cash flows from investing activities:
Purchases of property and equipment	(166,011)	(252,250)
Net cash provided by (used in) investing activities	(166,011)	(252,250)
Cash flows from financing activities:
Net borrowings on line of credit	800,000	900,000
Net cash provided by (used in) financing activities	800,000	900,000
Net increase (decrease) in cash and cash equivalents	(467,203)	(921,505)
Cash and cash equivalents at beginning of period	628,804	1,339,572
Cash and cash equivalents at end of period	$ 161,601	$ 418,067