Quarterly report pursuant to Section 13 or 15(d)

Consolidated Balance Sheets (Unaudited) (Parentheticals)

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Consolidated Balance Sheets (Unaudited) (Parentheticals) - USD ($)
$ in Thousands
Mar. 31, 2024
Dec. 31, 2023
Accounts receivable, allowance $ 150 $ 150
Preferred stock, par value (in dollars per share) $ 0.001 $ 0.001
Preferred stock, authorized (in shares) 25,000,000 25,000,000
Preferred stock, outstanding (in shares) 14,071,431 14,071,431
Common stock, par value (in dollars per share) $ 0.001 $ 0.001
Common stock, authorized (in shares) 990,000,000 990,000,000
Common stock, outstanding (in shares) 8,499,105 8,509,384