Balance Sheets (Current Period Unaudited) - USD ($)	Jul. 02, 2022	Jun. 30, 2022	Dec. 31, 2021	Dec. 25, 2021
Current assets:
Cash and cash equivalents	$ 5,076,282			$ 5,050,312
Accounts receivable-trade, net	4,536,973			4,870,021
Inventories, net	4,665,719			3,911,602
Prepaid expenses and other current assets	313,501			225,873
Total current assets	14,592,475			14,057,808
Property and equipment:
Production equipment	10,545,236			10,489,729
Furniture and office equipment	738,205			673,305
Leasehold improvements	968,509			951,384
Total cost	12,251,950			12,114,418
Accumulated depreciation and amortization	(11,212,803)			(11,028,154)
Construction in progress	373,776			246,669
Net property and equipment	1,412,923			1,332,933
Right-of-use lease asset	528,000			586,000
Deferred taxes, net	2,482,720			2,823,978
Total assets	19,016,118			18,800,719
Current liabilities:
Note payable, current portion		$ 47,321	$ 55,906
Accounts payable		1,621,278	2,100,251
Accrued expenses		648,180	1,086,429
Deferred revenue		1,752,543	1,707,138
Current lease liability	157,000	157,000	155,000
Total current liabilities		4,226,322	5,104,724
Note payable less current portion		77,120	98,684
Long-term lease liability	371,000	371,000	431,000
Total liabilities		4,674,442	5,634,408
Commitments and contingencies (note 4)
Stockholders` equity:
Common stock, $0.01 par value, authorized 20,000,000 shares; issued 14,438,786 and 14,350,786; outstanding 14,434,468 and 14,350,451; at July 2, 2022 and December 25, 2021, respectively;		144,388	143,508
Additional paid-in capital		39,600,085	39,281,810
Accumulated deficit		(25,381,948)	(26,256,492)
Less cost of 4,318 and 335 common shares repurchased at July 2, 2022 and December 25, 2021, respectively;		(20,849)	(2,515)
Total stockholders` equity	$ 14,341,676	14,341,676	13,166,311	$ 13,166,311
Total liabilities and stockholders` equity		$ 19,016,118	$ 18,800,719