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Note 5 - Restructuring (Details Textual) - Restructuring Plan [Member] | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2016 USD ($) | Sep. 30, 2016 USD ($)
Employee Severance [Member] |  |
Restructuring and Related Cost, Expected Cost | $ 3,900,000 | $ 3,900,000
Accelerated Non-Cash Stock Option Expense [Member] |  |
Restructuring and Related Cost, Expected Cost | 2,600,000 | 2,600,000
Employee Related Liabilities [Member] |  |
Restructuring and Related Cost, Expected Cost Remaining | 1,300,000 | 1,300,000
Contractual or Lease Obligations or Other Exit Costs [Member] |  |
Restructuring Charges | 0 | 0
Research and Development Expense [Member] |  |
Restructuring Charges | 4,700,000 | 4,700,000
General and Administrative Expense [Member] |  |
Restructuring Charges | 400,000 | 400,000
Selling and Marketing Expense [Member] |  |
Restructuring Charges | 100,000 | 100,000
Accrued Payroll and Employee Liabilities [Member] |  |
Restructuring and Related Cost, Cost Incurred to Date | 3,100,000 | 3,100,000
Restructuring and Related Cost, Expected Cost | $ 6,500,000 | 6,500,000
Payments for Restructuring |  | $ 0

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- Definition Amount of cash payments made as the result of exit or disposal activities. Excludes payments associated with a discontinued operation or an asset retirement obligation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b)(2) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 25 -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3536-108585 + Details
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- Definition Amount of costs incurred to date for the specified restructuring cost. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 5.P.4(b)) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747 + Details
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- Definition Amount expected to be recognized in earnings for the specified restructuring cost. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 5.P.4(b)) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747 + Details
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