| Dec 31, 2011 | Dec 31, 2012 | Dec 31, 2013 | Dec 31, 2014 | Dec 31, 2015 | Dec 31, 2016 | Dec 31, 2017 | Dec 31, 2018 | Dec 31, 2019 | Dec 31, 2020 | Dec 31, 2021 | Dec 31, 2022 |
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Cash and cash equivalents | 3 | 3 | 1 | 32 | 12 | 9 | 12 | 8 | 6 | 18 | 30 | 4 |
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Restricted cash | - | - | - | - | 0 | 0 | 0 | 0 | 0 | 0 | 0 | - |
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Accounts Receivable, after Allowance for Credit Loss, Current | 9 | 12 | 11 | 9 | 9 | 10 | 10 | 11 | 9 | 3 | 4 | 6 |
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Inventory | 11 | 11 | 11 | 13 | 13 | 14 | 12 | 12 | 11 | 11 | 13 | 16 |
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Prepaid expenses and other current assets | 2 | 2 | 2 | 2 | 1 | 2 | 2 | 2 | 1 | 3 | 2 | 3 |
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Total current assets | 25 | 27 | 26 | 55 | 35 | 34 | 36 | 33 | 27 | 35 | 49 | 29 |
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Property, Plant and Equipment, Net | 1 | 2 | 2 | 1 | 4 | 4 | 4 | 2 | 1 | 1 | 1 | 4 |
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Goodwill | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 |
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Right of use asset | - | - | - | - | - | - | - | - | 0 | 2 | 2 | 2 |
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Other assets | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
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Total assets | 30 | 32 | 31 | 59 | 42 | 42 | 43 | 39 | 32 | 41 | 55 | 38 |
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Accounts payable | 8 | 8 | 9 | 8 | 6 | 9 | 5 | 6 | 5 | 3 | 3 | 6 |
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Accrued liabilities | 6 | 6 | 5 | 5 | 6 | 6 | 6 | 8 | 5 | 7 | 8 | 9 |
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Deferred Revenue, Current | 2 | 3 | 3 | 2 | 3 | 3 | 3 | 2 | 2 | 2 | 2 | 2 |
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Medium-term Notes, Current | - | - | - | - | - | - | - | - | - | - | - | 1 |
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Total current liabilities | 16 | 19 | 22 | 16 | 15 | 18 | 13 | 16 | 26 | 11 | 14 | 18 |
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Deferred revenue | 0 | 0 | 0 | - | 0 | 0 | 0 | - | 0 | 0 | 0 | 0 |
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Warranty accrual | - | - | - | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 1 | 0 |
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Medium-term Notes, Noncurrent | - | - | - | - | - | - | - | - | - | - | 14 | 13 |
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Non current operating lease liability | - | - | - | - | - | - | - | - | - | 2 | 1 | 1 |
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Other liabilities | 0 | 0 | - | - | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 0 |
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Total liabilities | 17 | 20 | 23 | 17 | 17 | 20 | 14 | 27 | 28 | 31 | 30 | 33 |
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Preferred Stock, Value, Issued | - | - | - | - | - | - | - | - | - | 0 | 0 | - |
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Common Stock, Value, Issued | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
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Additional paid-in capital | 139 | - | - | 185 | 189 | 201 | 225 | 228 | 236 | 262 | 293 | 302 |
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Accumulated other comprehensive loss | -0 | -0 | -0 | -1 | -1 | -1 | -1 | -1 | -1 | -0 | -1 | -1 |
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Accumulated deficit | -109 | -112 | -124 | -143 | -163 | -178 | -195 | -217 | -235 | -251 | -268 | -296 |
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Total stockholders' equity | 13 | 12 | 8 | 42 | 25 | 22 | 29 | 11 | 0 | 10 | 25 | 5 |
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Total liabilities, redeemable preferred stock and stockholders' equity | 30 | 32 | 31 | 59 | 42 | 42 | 43 | 39 | 32 | 41 | 55 | 38 |
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