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Condensed Consolidated Balance Sheets - USD ($)
$ in Thousands
Jun. 30, 2023
Dec. 31, 2022
Current assets    
Cash and cash equivalents $ 8,599 $ 14,549
Accounts receivable, net 144 71
Other receivables 41 272
Inventory, net 563 589
Prepaid expenses and other current assets 918 1,216
Total current assets 10,265 16,697
Property and equipment, net 345 347
Intangible assets, net 65 140
Operating lease right-of-use asset, net 78 103
Total assets 10,753 17,287
Current liabilities    
Accounts payable 576 627
Accrued and other current liabilities 856 1,280
Current portion of operating lease liabilities 49 54
Current portion of deferred revenue 43 27
Total current liabilities 1,524 1,988
Operating lease liabilities, net of current portion 35 56
Deferred revenue, net of current portion 149 175
Derivative liability 4,473 6,917
Total liabilities 6,181 9,136
Commitments and contingencies (Note 9)
Stockholders' equity    
Class A common stock, $0.001 par value; 150,000,000 shares authorized; 28,270,762 and 28,207,330 shares issued and outstanding as of June 30, 2023 and December 31, 2022, respectively 28 28
Additional paid-in capital 160,443 159,618
Accumulated deficit (155,249) (151,107)
Accumulated other comprehensive loss (650) (388)
Total stockholders' equity 4,572 8,151
Total liabilities and stockholders' equity $ 10,753 $ 17,287