Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)	3 Months Ended
Mar. 26, 2022	Mar. 27, 2021
Cash flows from operating activities:
Net loss	$ (1,372,664)	$ (4,185,723)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	267,590	205,023
Accretion of premium or discount on marketable debt securities	128	1,534
Stock-based compensation	656,073	2,610,166
Loss on disposal of property and plant	202,671	14,950
Gain on investments	(4,700,000)
Income taxes	35,836	32,070
Foreign currency gains	(16,351)	(68,351)
Change in allowance for bad debt	(26,281)	95,931
Write-off of excess inventory	588,175	408,939
Other non-cash items	453,262	397,211
Changes in assets and liabilities:
Accounts receivable	5,777,308	1,258,770
Contract assets	(252,809)	2,406,334
Inventory	(1,156,461)	(1,398,350)
Prepaid expenses and other current assets	(314,361)	(773,067)
Accounts payable and accrued expenses	(107,657)	(966,202)
Billings in excess of revenue earned	(2,317,122)	(284,515)
Net cash used in operating activities	(2,282,663)	(245,280)
Cash flows from investing activities:
Capital expenditures	(524,368)	(346,450)
Purchases of marketable debt securities	(3,000,030)
Proceeds from sale of marketable debt securities	1,000,000	200,000
Net cash used in investing activities	(2,524,398)	(146,450)
Cash flows from financing activities:
Sale of treasury stock, net of costs		15,520,084
Settlements of restricted stock for tax withholding obligations	(95,613)	(32,705)
Net cash (used in) provided by financing activities	(95,613)	15,487,379
Effect of exchange rate changes on cash	(17,765)	(5,207)
Net (decrease) increase in cash and cash equivalents	(4,920,439)	15,090,442
Cash and cash equivalents:
Beginning of period	26,787,931	17,112,869
End of period	$ 21,867,492	$ 32,203,311

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