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Note 4 - Property and Equipment (Details) - Cost, Accumulated Depreciation and Amortization and Net Carrying Value of Property and Equipment (USD $)
In Thousands, unless otherwise specified
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Dec. 31, 2014
|
Dec. 31, 2013
|
| Property, Plant and Equipment [Line Items] |
|
|
| Cost |
$ 4,311 |
$ 3,923 |
| Accumulated Depreciation and Amortization |
(2,735) |
(2,228) |
| Net Carrying Value |
1,576 |
1,695 |
| Scientific Equipment [Member] |
|
|
| Property, Plant and Equipment [Line Items] |
|
|
| Cost |
2,273 |
1,985 |
| Accumulated Depreciation and Amortization |
(1,429) |
(1,096) |
| Net Carrying Value |
844 |
889 |
| Leasehold Improvements [Member] |
|
|
| Property, Plant and Equipment [Line Items] |
|
|
| Cost |
1,590 |
1,579 |
| Accumulated Depreciation and Amortization |
(948) |
(787) |
| Net Carrying Value |
642 |
792 |
| Computer Equipment [Member] |
|
|
| Property, Plant and Equipment [Line Items] |
|
|
| Cost |
414 |
325 |
| Accumulated Depreciation and Amortization |
(327) |
(319) |
| Net Carrying Value |
87 |
6 |
| Office Equipment [Member] |
|
|
| Property, Plant and Equipment [Line Items] |
|
|
| Cost |
34 |
34 |
| Accumulated Depreciation and Amortization |
(31) |
(26) |
| Net Carrying Value |
$ 3 |
$ 8 |