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Consolidated Statements of Cash Flows - USD ($) | 12 Months Ended
--- | ---
Dec. 28, 2024 | Dec. 30, 2023 | Dec. 31, 2022
Cash flows from operating activities: |  |  |
Net loss | $ (43,877,896) | $ (19,748,219) | $ (19,326,265)
Adjustments to reconcile net loss to net cash used in operating activities: |  |  |
Depreciation and amortization | 636,580 | 608,222 | 722,024
Accretion of discount on marketable securities |  |  | 128
Stock-based compensation | 3,334,671 | 3,875,273 | 1,267,705
Net loss (gain) on remeasurement of investments | 1,612,105 | 2,887,893 | (2,700,000)
Income taxes | 170,642 |  | 143,345
Foreign currency losses | (207,926) | 91,791 | 449,443
Loss on sale of property and equipment | 59,151 | 46,231 | 317,032
Provision for credit losses | 105,842 | 709,721 | 162,638
Noncash provision for excess inventory | 2,378,675 | 1,143,622 | 2,078,750
Accrued litigation damages | 24,800,000 |  |
Changes in other non-cash items | 396,451 | 193,708 | 2,329,000
Changes in assets and liabilities: |  |  |
Accounts receivable | (1,578,548) | (5,271,763) | 6,806,578
Contract assets | (3,917,280) | 821,094 | (1,835,518)
Inventory | (922,589) | (2,255,352) | (2,010,749)
Prepaid expenses, other current assets and other assets | 53,610 | (202,504) | 908,156
Accounts payable and accrued expenses | 3,574,948 | 1,836,038 | (3,859,768)
Contract liabilities and billings in excess of revenue earned | (845,041) | 3,568 | (3,139,749)
Net cash used in operating activities | (14,226,605) | (15,260,677) | (17,687,250)
Cash flows from investing activities: |  |  |
Proceeds from sale of marketable securities | 9,713,366 | 10,374,593 | 2,000,024
Purchase of equity investments |  |  | (499,998)
Other assets | (45) | 62,694 | 20,909
Capital expenditures | (815,299) | (949,487) | (832,712)
Purchases of marketable securities | (19,186,857) | (17,624,779) | (4,000,042)
Net cash used in investing activities | (10,288,835) | (8,136,979) | (3,311,819)
Cash flows from financing activities: |  |  |
(Purchase) sale of treasury stock, net of costs |  |  | 461,723
Issuance of common stock and pre-funded warrants, net of costs | 33,782,712 | 21,335,000 | 2,397,618
Settlements of restricted stock for tax withholding obligations | (266,885) |  | (198,740)
Net cash provided by financing activities | 33,515,827 | 21,335,000 | 2,660,601
Effect of exchange rate changes on cash | (952) | 14,463 | (190,585)
Net increase (decrease) in cash, cash equivalents and restricted cash | 8,999,435 | (2,048,193) | (18,529,053)
Cash and cash equivalents at beginning of year | 6,210,685 | 8,258,878 | 26,787,931
Cash, cash equivalents and restricted cash at end of year | 15,210,120 | 6,210,685 | 8,258,878
Supplemental disclosure of cash flow information: |  |  |
Construction in progress included in accrued expenses | 17,000 | 200,000 | 168,000
Right-of-use asset obtained in exchange for lease liability | $ 217,046 |  |

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