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Condensed Statements of Cash Flows - USD ($)
$ in Thousands
 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Cash Flows From Operating Activities    
Net loss $ (22,765) $ (24,767)
Adjustments to reconcile net loss to net cash used in operating activities:    
Depreciation and amortization 1,937 1,894
Loss on disposal of Autonomous Security Robots 761 1,075
(Gain)/Loss on disposal of property and equipment (10)  
Stock compensation expense 1,183 1,327
Warrants issued in exchange for consulting services 43  
Change in fair value of warrant and derivative liabilities   1,515
Accrued interest 315 264
Amortization of debt discount 58 51
Changes in operating assets and liabilities:    
Accounts receivable, net (733) (265)
Prepaid expenses and other assets (707) 474
Inventory (21) (576)
Accounts payable (210) 676
Accrued expenses and other current liabilities 494 275
Deferred revenue (467) 736
Lease liabilities and other noncurrent liabilities 387 (56)
Net cash used in operating activities (19,735) (17,377)
Cash Flows From Investing Activities    
Purchases and related costs incurred for Autonomous Security Robots (1,480) (2,468)
Purchases of property and equipment (412) (12)
Net cash used in investing activities (1,892) (2,480)
Cash Flows From Financing Activities    
Proceeds from stock options exercised   18
Cash paid for fractional shares   (78)
Proceeds from equity sale, net of issuance costs 31,219 20,426
Proceeds from issuance of Public Safety Infrastructure Bonds, net of issuance costs   2,639
Proceeds from Direct Registration Offering 1,436  
Repayments of debt obligations (1,865) (227)
Share conversion costs   (2)
Net cash provided by financing activities 30,790 22,776
Net change in cash, cash equivalents and restricted cash 9,163 2,919
Cash, cash equivalents and restricted cash at beginning of the period 11,226 2,382
Cash, cash equivalents and restricted cash at end of the period 20,389 5,301
Supplemental Disclosure of Cash Flow Information    
Capital expenditures in accounts payable, accruals and other long-term liabilities 82 53
Preferred stock warrant reclassification to equity   4,762
Operating lease liabilities arising from obtaining right-of-use-assets 3,049  
Promissory note issued in exchange for cancellation of Class A Common Stock Warrants   3,000
Financing of insurance premiums $ 591  
Conversion of preferred stock to common stock   $ 34,203