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Note 1 - Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2017
Notes Tables |
Schedules of Concentration of Risk, by Risk Factor [Table Text Block] |
|  | 201 7 |  |  | 201 6 |
US-based IT OEM |  |  | 67% |  |  |  | 39% |
US- based technology company |  |  | 4% |  |  |  | 12% |
US-based data center company |  |  | 0% |  |  |  | 13% |
Allowance for Doubtful Accounts [Table Text Block] |
|  | Year Ended December 31, |
|  | 2017 |  |  | 2016 |
Balance at beginning of year |  | $ | 4 |  |  | $ | 19 |
Additions charged to expense |  |  | 2 |  |  |  | 5 |
Recovery of amounts previously reserved |  |  | 2 |  |  |  | (7 | )
Amounts written off |  |  | - |  |  |  | (13 | )
Balance at end of year |  | $ | 8 |  |  | $ | 4 |

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