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Supplemental Information (Tables) | 3 Months Ended
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Mar. 31, 2023
Organization, Consolidation and Presentation of Financial Statements [Abstract] |
Schedules of Concentration Risk | The following table sets forth our concentration of accounts receivable, net of specific allowances for doubtful accounts.
| March 31, 2023 |  | December 31, 2022
Customer A | 39 | % |  | 23 | %
Customer B | 14 | % |  | — | %
Schedule of Inventory | Our inventory balance on the dates presented consisted of the following:
| March 31, 2023 |  | December 31, 2022
Raw materials | $ | 2,681 |  |  | $ | 2,968 |
Work-in-process | 82 |  |  | — |
Finished goods | 38 |  |  | 50 |
Other | 6 |  |  | 30 |
Inventory reserve | (136) |  |  | (268) |
Total inventory | $ | 2,671 |  |  | $ | 2,780 |
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share | The following table sets forth common stock equivalents that have been excluded from the computation of dilutive weighted average shares outstanding as their inclusion would have been anti-dilutive:
| Three Months Ended March 31, |  |
| 2023 |  | 2022 |  |  |  |
Warrants | 6,632,561 |  | 5,636,801 |  |  |  |  |
Options | 867,031 |  | 897,229 |  |  |  |  |
Restricted stock units | 5,480,225 |  | 3,480,102 |  |  |  |
Total | 12,979,817 |  | 10,014,132 |  |  |  |
Schedule of Financial Instruments Measured at Fair Value | Our assets and liabilities measured at fair value on a recurring basis as of March 31, 2023 are set forth below:
| Level 1 |  | Level 2 |  | Level 3 |  | Total
Liabilities: |  |  |  |  |  |  |
Warrant liability | $ | — |  |  | $ | 3 |  |  | $ | — |  |  | $ | 3 |
Total | $ | — |  |  | $ | 3 |  |  | $ | — |  |  | $ | 3 |
Our financial instruments measured at fair value on a recurring basis as of December 31, 2022 are set forth below:
| Level 1 |  | Level 2 |  | Level 3 |  | Total
Liabilities: |  |  |  |  |  |  |
Warrant liability | $ | — |  |  | $ | 256 |  |  | $ | — |  |  | $ | 256 |
Total | $ | — |  |  | $ | 256 |  |  | $ | — |  |  | $ | 256 |
Schedule of Calculated Aggregate Fair Values and Assumptions | The following table sets forth the assumptions used to calculate the fair values of the liability classified warrant issued in connection with our 2020 Convertible Notes as of the dates presented:
| March 31, 2023 |  | December 31, 2022
Strike price per share | $ | 1.42 |  |  | $ | 1.42 |
Closing price per share | $ | 0.71 |  |  | $ | 0.77 |
Term (years) | 0.28 |  | 0.53
Volatility | 57 | % |  | 102 | %
Risk-free rate | 4.97 | % |  | 4.70 | %
Dividend Yield | — |  | —

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- Definition Tabular disclosure of input and valuation technique used to measure fair value and change in valuation approach and technique for each separate class of asset and liability measured on recurring and nonrecurring basis. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb) -URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258 + Details
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- Definition Tabular disclosure of liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, by class that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). Where the quoted price in an active market for the identical liability is not available, the Level 1 input is the quoted price of an identical liability when traded as an asset. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258 + Details
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