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Note 1 - Business Description, Basis of Presentation and Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2018
Notes Tables |
Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] |
|  | Year Ended December 31, |
|  | 201 8 |  |  | 201 7 |
Balance at beginning of the year |  | $ | 472 |  |  | $ | 187 |
Allowance increase (decrease) |  |  | 159 |  |  |  | 287 |
Write offs, net of recoveries |  |  | - |  |  |  | (2 | )
Balance at end of the year |  | $ | 631 |  |  | $ | 472 |
Schedule of Deferred Revenue and Associated Cost of Goods Sold and Gross Profit [Table Text Block] |
|  | As of December 31, |
|  | 2018 |  |  | 2017 |
Deferred revenue |  | $ | 283 |  |  | $ | 4,635 |
Deferred cost of goods sold |  |  | - |  |  |  | 1,555 |
Deferred gross profit |  | $ | 283 |  |  | $ | 3,080 |
Disaggregation of Revenue [Table Text Block] |
|  | Twelve months ended December 31, 2018 |  |  | Twelve months ended December 31, 2017 |
Audio Conferencing |  | $ | 13,946 |  |  | $ | 21,078 |
Microphones |  |  | 9,012 |  |  |  | 13,430 |
Video products |  |  | 5,198 |  |  |  | 7,296 |
|  | $ | 28,156 |  |  | $ | 41,804 |
|  | Twelve months ended December 31, 2018 |  |  | Twelve months ended December 31, 2017 |
North and South America |  | $ | 16,534 |  |  | $ | 26,310 |
Asia (including Middle East) and Australia |  |  | 7,924 |  |  |  | 11,087 |
Europe and Africa |  |  | 3,698 |  |  |  | 4,407 |
|  | $ | 28,156 |  |  | $ | 41,804 |
Schedule of Product Warranty Liability [Table Text Block] |
|  | Year Ended December 31, |
|  | 2018 |  |  | 2017 |
Balance at the beginning of year |  | $ | 245 |  |  | $ | 246 |
Accruals/additions |  |  | 288 |  |  |  | 399 |
Usage/claims |  |  | (339 | ) |  |  | (400 | )
Balance at end of year |  | $ | 194 |  |  | $ | 245 |
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] |
|  | Year Ended December 31, |
|  | 2018 |  |  | 2017 |
Numerator: |  |  |  |  |  |  |  |
Net loss |  | $ | (16,687 | ) |  | $ | (14,172 | )
Denominator: |  |  |  |  |  |  |  |
Basic weighted average shares |  |  | 8,942,629 |  |  |  | 8,576,588 |
Dilutive common stock equivalents using treasury stock method |  |  | - |  |  |  | - |
Diluted weighted average shares |  |  | 8,942,629 |  |  |  | 8,576,588 |
Basic loss per common share: |  | $ | (1.87 | ) |  | $ | (1.65 | )
Diluted loss per common share: |  | $ | (1.87 | ) |  | $ | (1.65 | )
Weighted average options outstanding |  |  | 713,331 |  |  |  | 815,870 |
Anti-dilutive options not included in the computation |  |  | 713,331 |  |  |  | 815,870 |

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