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STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Cash Flows From Operating Activities    
Net loss $ (22,118) $ (25,643)
Adjustments to reconcile net loss to net cash used in operating activities:    
Depreciation and amortization 2,364 1,710
Stock compensation expense 2,726 3,539
Change in fair value of warrant and derivative liability (4,910) (20,857)
Change in fair value of convertible note   4,650
Amortization of debt discount 5 8,878
Loss from damage of Autonomous Security Robots 19  
Common stock issued in exchange for consulting services 385 267
Non-cash interest 454 343
Changes in operating assets and liabilities:    
Accounts receivable (720) 181
Inventory 240 (41)
Prepaid expenses and other current assets (457) 361
Other assets (5) (11)
Accounts payable (599) 944
Accrued expenses (1,258) 1,213
Deferred revenue (548) 607
Other current and noncurrent liabilities 267 (205)
Net cash used in operating activities (24,155) (24,064)
Cash Flows From Investing Activities    
Acquisition of business, net of cash acquired   (5,421)
Purchase of Autonomous Security Robots (4,665) (4,399)
Purchase of property and equipment (457) (111)
Net cash used in investing activities (5,122) (9,931)
Cash Flows From Financing Activities    
Proceeds from stock options exercise 263 551
Proceeds from issuance of REG A Bonds, net of issuance costs 1,237  
Proceeds for the issuance of convertible notes, net of issuance costs   3,157
Offering proceeds, net of issuance costs   19,625
Proceeds from issuance of warrants, net of issuance costs   1,818
Proceeds from equity sale, net of issuance costs 25,918 2,879
Net repayments from financing obligations (560)  
Share conversion costs (9) (74)
Net cash provided by financing activities 26,849 27,956
Net change in cash and cash equivalents (2,428) (6,039)
Cash, cash equivalents and restricted cash at beginning of year 4,810 10,849
Cash, cash equivalents and restricted cash at end of year 2,382 4,810
Supplemental Disclosure of Non-Cash Financing and Investing Activities    
Goodwill adjustment 578  
Cashless exercise of warrants for preferred stock   370
Conversion of preferred stock to common stock 1,580 21,436
Conversion of debt obligations to Class A Common Stock 8,592 16,011
Fair value of shares issued for consulting services   386
Operating lease liabilities arising from obtaining right of use asset $ 134  
Holdback liability for acquisition of business included in accrued liabilities   $ 232