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CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) | Mar. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | --- | ---
CONDENSED CONSOLIDATED BALANCE SHEETS |  |  |
Unbilled receivables | $ 89,749 | $ 109,475 | $ 109,194
Non-convertible notes plus accrued interest |  | $ 16,458 | $ 12,252
Preferred stock, par value (per share) | $ 0.01 | $ 0.01 | $ 0.01
Preferred stock, shares authorized | 2,000,000 | 2,000,000 | 2,000,000
Preferred stock, shares issued | 0 | 0 | 0
Preferred stock, shares outstanding | 0 | 0 | 0
Common stock, par value | $ 0.01 | $ 0.01 | $ 0.01
Common stock, shares authorized | 50,000,000 | 50,000,000 | 50,000,000
Common stock, shares issued | 5,121,607 | 4,910,815 | 4,151,542
Common stock, shares outstanding | 5,121,607 | 4,854,302 | 4,095,029
Treasury stock, at cost, shares held | 0 | 56,513 | 56,513

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- Definition Carrying value as of the balance sheet date of [accrued] interest payable on all forms of debt, including trade payables, that has been incurred and is unpaid. Used to reflect the current portion of the liabilities (due after one year or within the normal operating cycle if longer). + References No definition available. + Details
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