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Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)
 3 Months Ended 9 Months Ended 12 Months Ended
Sep. 24, 2022
Mar. 26, 2022
Sep. 25, 2021
Mar. 27, 2021
Sep. 24, 2022
Sep. 25, 2021
Dec. 25, 2021
Cash flows from operating activities:              
Net loss $ (6,149,174) $ (1,372,664) $ (2,128,683) $ (4,185,723) $ (13,169,027) $ (10,163,289)  
Adjustments to reconcile net loss to net cash used in operating activities:              
Depreciation and amortization         665,217 566,092  
Accretion of premium or discount on marketable debt securities         128 6,559  
Stock-based compensation         1,370,654 3,766,859  
Foreign currency losses (gains)         339,186 (174,213)  
Change in allowance for bad debt         4,772 70,552  
Write-off of excess inventory         1,670,993 492,230  
Unrealized gains on investments, net of impairment         (2,700,000)  
Loss on disposal of property and plant         202,670 71,400  
Deferred income taxes         107,509 96,210  
Provision for warranty         1,451,478 6,861  
Changes in assets and liabilities:              
Accounts receivable         3,756,182 2,148,942  
Contract assets         (2,302,972) 617,191  
Inventory         (1,944,577) (2,772,548)  
Prepaid expenses and other current assets         (272,446) (765,430)  
Accounts payable and accrued expenses         (1,651,538) (2,938,795)  
Billings in excess of revenue earned         (3,130,965) (82,850)  
Net cash used in operating activities         (15,602,736) (9,054,229) $ (10,700,000)
Cash flows from investing activities:              
Other assets         23,802 (9,309)  
Capital expenditures         (642,146) (865,417)  
Equity investment purchase         (499,998)  
Proceeds from sale of marketable debt securities         1,000,000 200,000  
Purchases of marketable debt securities         (4,000,042)  
Net cash used in investing activities         (4,118,384) (674,726)  
Cash flows from financing activities:              
Sale of treasury stock, net of costs         461,723  
Settlements of restricted stock for tax withholding obligations         (95,613) (32,705)  
Issuance of common stock, net of costs         2,397,618 21,051,373  
Net cash provided by financing activities         2,763,728 21,018,668  
Effect of exchange rate changes on cash         (205,125) (52,784)  
Net (decrease) increase in cash and cash equivalents         (17,162,517) 11,236,929  
Cash and cash equivalents:              
Beginning of period   $ 26,787,931   $ 17,112,869 26,787,931 17,112,869 17,112,869
End of period $ 9,625,414   $ 28,349,798   $ 9,625,414 $ 28,349,798 $ 26,787,931