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Note 5 - Supplemental Balance Sheet and Cash Flow Information (Tables) | 6 Months Ended
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Jun. 30, 2020
Notes Tables |
Schedule of Inventory, Current [Table Text Block] |
|  | June 30, 2020 |  |  | December 31, 2019 |
Raw materials |  | $ | 478 |  |  | $ | 470 |
Work in process and finished goods |  |  | 706 |  |  |  | 787 |
Inventory reserves |  |  | (68 | ) |  |  | (64 | )
Total |  | $ | 1,116 |  |  | $ | 1,193 |
Schedule of Cash and Cash Equivalents [Table Text Block] |
|  | June 30, 2020 |  |  | December 31, 2019 |  |  | June 30, 2019 |  |  | December 31, 2018 |
Cash and cash equivalents |  | $ | 694 |  |  | $ | 508 |  |  | $ | 289 |  |  | $ | 510 |
Restricted cash included in other current assets |  |  | 5 |  |  |  | 6 |  |  |  | 5 |  |  |  | 7 |
Restricted cash included in other noncurrent assets |  |  | 3 |  |  |  | 4 |  |  |  | 4 |  |  |  | 3 |
Total cash, cash equivalents and restricted cash |  | $ | 702 |  |  | $ | 518 |  |  | $ | 298 |  |  | $ | 520 |

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