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Note 10 - Accrued Expenses | 12 Months Ended
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Dec. 31, 2017
Notes to Financial Statements |
Accounts Payable and Accrued Liabilities Disclosure [Text Block] | 10. Accrued Expenses Accrued expenses consist of the following:
|  | December 31,
|  | 2017 |  | 2016
Compensation and related expenses |  | $ | 2,893 |  |  | $ | 3,089 |
Facility construction costs |  |  | - |  |  |  | 804 |
Research grants |  |  | 419 |  |  |  | 463 |
Clinical trial costs |  |  | 2,318 |  |  |  | 227 |
Professional fees |  |  | 448 |  |  |  | 802 |
Deferred rent |  |  | - |  |  |  | 231 |
Other |  |  | 248 |  |  |  | 880 |
Total |  | $ | 6,326 |  |  | $ | 6,496 |

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- Definition The entire disclosure for accounts payable and accrued liabilities at the end of the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(a),20,24) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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