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CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($)
$ in Thousands
Sep. 30, 2022
Dec. 31, 2021
Current assets    
Cash and cash equivalents $ 3,889 $ 10,777
Restricted cash 0 5
Marketable securities 6,574 0
Accounts receivable, net 958 1,080
Inventories 1,057 814
Prepaid expenses and other current assets 453 391
Total current assets 12,931 13,067
Property, plant and equipment, net 196 338
Intangible assets, net 89 131
Right-of-use assets 197 163
Deferred tax assets 8 8
Other assets 39 72
Total assets 13,460 13,779
Current liabilities    
Accounts payable 358 338
Accrued liabilities 334 507
Lease liabilities, current 144 138
Accrued income taxes 113 54
Total current liabilities 949 1,037
Long-term liabilities    
Lease liabilities, long-term 60 37
Total long-term liabilities 60 37
Total liabilities 1,009 1,074
Commitments and contingencies (Note 8)
Stockholders' equity    
Preferred stock, $0.01 par value: 1,000 shares authorized, 200 shares of Series A Convertible Preferred Stock issued and outstanding at both September 30, 2022 and December 31, 2021 ($5.0 million liquidation preference) 2 2
Common stock, $0.001 par value: 30,000 shares authorized, 6,604 shares issued and outstanding at September 30, 2022, 6,602 shares issued and outstanding at December 31, 2021 7 7
Additional paid-in-capital 62,567 62,552
Accumulated other comprehensive income (loss) (133) 96
Accumulated deficit (49,992) (49,952)
Total stockholders' equity 12,451 12,705
Total liabilities and stockholders' equity $ 13,460 $ 13,779