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Consolidated Balance Sheets - USD ($)
$ in Thousands
Dec. 31, 2023
Dec. 31, 2022
Current assets    
Cash and cash equivalents $ 12,646 $ 7,671
Restricted cash 50 4,151
Short-term investments 19,808 0
Accounts receivable, net 241 366
Inventories 3,322 1,998
Prepaid expenses and other current assets 1,091 1,969
Total current assets 37,158 16,155
Property, plant and equipment, net 1,352 1,422
Right-of-use assets 103 285
Total assets 38,613 17,862
Current liabilities    
Accounts payable 1,012 2,018
Accrued expenses 5,249 4,685
Lease liabilities, current 37 186
Loan payable, current 5,239 7,846
Convertible notes payable, current 4,911 0
Total current liabilities 16,448 14,735
Warrant Liability 5,548 0
Other liabilities, non-current 840 1,144
Loan payable, non-current 0 3,070
Convertible notes payable, non-current 0 4,772
Total liabilities 22,836 23,721
Commitments and contingencies (see note 15)
Stockholders’ equity (deficit)    
Preferred stock, $.01 par value; 10,000,000 shares authorized; 24,819 and 11,357 shares issued and outstanding at December 31, 2023 and 2022, respectively 0 0
Common stock, $.01 par value; 80,000,000 shares authorized; 22,761,554 shares and 10,046,571 shares issued and outstanding at December 31, 2023 and 2022, respectively 228 100
Additional paid-in capital 520,576 451,608
Accumulated deficit (505,162) (457,484)
Accumulated other comprehensive income (loss) 135 (83)
Total stockholders’ equity (deficit) 15,777 (5,859)
Total liabilities and stockholders’ equity $ 38,613 $ 17,862