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Note 1 - Description of Business and Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2019
Notes Tables |
Schedule of Principal Transactions Revenue [Table Text Block] |
|  | Year Ended December 31, |
|  | 2019 |  |  | 2018 |  |  | 2017 |
Trade revenue |  | $ | 8 |  |  | $ | 3 |  |  | $ | 2 |
Trade expense |  |  | (8 | ) |  |  | (3 | ) |  |  | (2 | )
Net trade (loss) income |  | $ | - |  |  | $ | - |  |  | $ | - |
Property, Plant and Equipment [Table Text Block] |
|  |  |  |  |  |  |  |  |  | Estimated
|  | December 31, |  |  | Useful Lives
|  | 2019 |  |  | 2018 |  |  | (in years)
Property and equipment: |  |  |  |  |  |  |  |  |  |  |  |
Land |  | $ | 119 |  |  | $ | 52 |  |  |  |  |
Buildings and improvements |  |  | 291 |  |  |  | 166 |  |  | 7 | to | 40
Equipment |  |  | 776 |  |  |  | 548 |  |  | 3 | to | 20
|  |  | 1,186 |  |  |  | 766 |  |  |  |  |
Accumulated depreciation |  |  | (461 | ) |  |  | (403 | ) |  |  |  |
Total property and equipment, net |  | $ | 725 |  |  | $ | 363 |  |  |  |  |
Schedule of Disposal of Assets and Purchase of Property and Equipment [Table Text Block] |
|  | Year ended December 31, |
|  | 2019 |  |  | 2018 |  |  | 2017 |
Gain (loss) on disposal of assets, net: |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from sale of assets |  | $ | 253 |  |  | $ | 9 |  |  | $ | 91 |
Proceeds from Repack |  |  | 41 |  |  |  | 14 |  |  |  | - |
Net book value of assets disposed |  |  | (240 | ) |  |  | (6 | ) |  |  | (17 | )
Total |  | $ | 54 |  |  | $ | 17 |  |  | $ | 74 |
Purchase of property and equipment: |  |  |  |  |  |  |  |  |  |  |  |
Recurring purchases - operations |  | $ | 89 |  |  | $ | 41 |  |  | $ | 32 |
Repack |  |  | 20 |  |  |  | 27 |  |  |  | 3 |
Repack related |  |  | 1 |  |  |  | 2 |  |  |  | - |
Total |  | $ | 110 |  |  | $ | 70 |  |  | $ | 35 |
Schedule of Weighted Average Number of Shares [Table Text Block] |
|  | Year Ended December 31, |
|  | 2019 |  |  | 2018 |  |  | 2017 |
Weighted-average shares outstanding, basic |  |  | 99 |  |  |  | 88 |  |  |  | 73 |
Weighted-average shares underlying stock options and restricted shares |  |  | 1 |  |  |  | 1 |  |  |  | 1 |
Weighted-average shares outstanding, diluted |  |  | 100 |  |  |  | 89 |  |  |  | 74 |
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] |
|  | December 31, |
|  | 2019 |  |  | 2018 |
Accumulated balances of items included in accumulated other comprehensive loss: |  |  |  |  |  |  |  |
Increase in pension liability |  | $ | (42 | ) |  | $ | (35 | )
Income tax benefit |  |  | (11 | ) |  |  | (14 | )
Accumulated other comprehensive loss |  | $ | (31 | ) |  | $ | (21 | )

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