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Condensed Consolidated Balance Sheets (Unaudited) - USD ($)
$ in Thousands
Mar. 31, 2024
Dec. 31, 2023
Current assets    
Cash and cash equivalents $ 11,760 $ 12,646
Restricted cash 50 50
Short-term investments 15,360 19,808
Accounts receivable, net 1,564 241
Inventory 3,634 3,322
Prepaid expenses and other current assets 1,278 1,091
Total current assets 33,646 37,158
Property, plant and equipment, net 1,336 1,352
Right-of-use assets 1,117 103
Total assets 36,099 38,613
Current liabilities    
Accounts payable 1,487 1,012
Accrued expenses 4,395 5,249
Lease liabilities, current 102 37
Loan payable 2,408 5,239
Convertible notes payable 4,949 4,911
Total current liabilities 13,341 16,448
Warrant liability 6,160 5,548
Lease Liabilities, non-current 1,016 0
Other liabilities, non-current 962 840
Total liabilities 21,479 22,836
Commitments and contingencies (see Note 15)
Stockholders’ equity    
Preferred stock, $0.01 par value; 10,000,000 shares authorized; 16,809 and 24,819 shares issued and outstanding at March 31, 2024 and December 31, 2023, respectively 0 0
Common stock, $0.01 par value; 80,000,000 shares authorized; 25,439,319 shares and 22,761,554 shares issued and outstanding at March 31, 2024 and December 31, 2023, respectively 254 228
Additional paid-in capital 530,482 520,576
Accumulated deficit (516,273) (505,162)
Accumulated other comprehensive loss 157 135
Total stockholders’ equity 14,620 15,777
Total liabilities and stockholders’ equity $ 36,099 $ 38,613