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Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Cash flows from operating activities:    
Net loss [1] $ (27,022) $ (25,978)
Adjustments to reconcile net loss to net cash used in operations    
Depreciation and intangibles amortization [2] 3,307 1,863
Amortization of issuance costs [2] 925 547
Change in fair value of warrant liabilities [1] (528) (3,392)
Provision for credit losses [2] 279
Other recognized losses (gains) [2] 5 78
Stock-based compensation expense [2] 4,271 9,323
Stock-based compensation expense for services [2] 284 2,350
Changes in operating assets and liabilities    
Accounts receivable [2] (52) (13)
Inventory [2] (70)
Prepaid expenses and other current assets [2] (110) (145)
Other non-current assets [2] 153 (1,214)
Accounts payable [2] 596 219
Accrued expenses and other current liabilities [2] 110 (319)
Other long-term liabilities [2] (463) 1,303
Net cash used in operating activities [2] (18,315) (15,378)
Cash flows from investing activities:    
Purchase of property and equipment [2] (2,112) (870)
Issuance of loan receivable [2] (500)
Net cash used for QPhoton, Inc. merger [2] (1,356)
Net cash used in investing activities [2] (2,612) (2,226)
Cash flows from financing activities:    
Proceeds raised from financial liabilities, net of issuance costs 6,960
Payments of financial liabilities, net of interest (6,187)
Series A Preferred dividend payments (865) (787)
Proceeds from stock issuance related to ATM facility [2] 24,730
Net cash provided by financing activities [2] 17,678 6,173
Net decrease in cash [2] (3,249) (11,431)
Cash and cash equivalents, beginning of period [2] 5,308 16,739
Cash and cash equivalents, end of period [2] 2,059 5,308
Supplemental disclosures of Cash flow information:    
Cash paid for interest [2] 813
Non-cash operating activities    
Non-cash issuance of shares for services [2] 2,651 502
Non-cash financing activities    
Common stock, preferred stock and warrants issued in connection with QPhoton Merger [2] $ 71,050
[1] As described in Note 3 to the Consolidated Financial Statements appearing elsewhere in this Amendment, we have restated the Consolidated Financial Statements.
[2] As described in Note 3 to the Consolidated Financial Statements appearing elsewhere in this Amendment, we have restated the Consolidated Financial Statements.