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Note 2 - Summary of Significant Accounting Policies (Details Textual) - USD ($) $ in Thousands |  | 1 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | ---
Nov. 30, 2017 | Dec. 31, 2017 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | Jan. 01, 2019 | Jan. 01, 2018
Capitalized Computer Software, Net, Ending Balance |  | $ 4,900 | $ 16,600 | $ 4,900 |  |  |
Advertising Expense |  |  | 11,800 | 10,700 | $ 10,500 |  |
Research and Development Expense, Total |  |  | 28,735 | 23,560 | 22,388 |  |
Payments to Acquire Businesses, Net of Cash Acquired, Total |  |  | 90 | $ 110,533 |  |  |
Cumulative Effect of New Accounting Principle in Period of Adoption |  |  | 1,462 |  |  |  |
Accounting Standards Update 2016-02 [Member] | Subsequent Event [Member] |  |  |  |  |  |  |
Operating Lease, Right-of-Use Asset |  |  |  |  |  | $ 14,000 |
Operating Lease, Liability, Total |  |  |  |  |  | $ 14,000 |
Retained Earnings [Member] |  |  |  |  |  |  |
Cumulative Effect of New Accounting Principle in Period of Adoption |  |  | $ 1,462 |  |  |  |
Retained Earnings [Member] | Accounting Standards Update 2014-09 [Member] |  |  |  |  |  |  |
Cumulative Effect of New Accounting Principle in Period of Adoption |  |  |  |  |  |  | $ 1,500
Rapid [Member] |  |  |  |  |  |  |
Business Combination, Consideration Transferred, Total | $ 121,900 | 121,959 |  |  |  |  |
Payments to Acquire Businesses, Net of Cash Acquired, Total | 110,600 | 110,623 |  |  |  |  |
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable | $ 11,300 | $ 11,336 |  |  |  |  |
Building [Member] |  |  |  |  |  |  |
Property, Plant and Equipment, Useful Life |  |  | 39 years |  |  |  |
Minimum [Member] |  |  |  |  |  |  |
Property, Plant and Equipment, Useful Life |  |  | 3 years |  |  |  |
Finite-Lived Intangible Asset, Useful Life |  |  | 2 years |  |  |  |
Minimum [Member] | Equipment [Member] |  |  |  |  |  |  |
Property, Plant and Equipment, Useful Life |  |  | 3 years |  |  |  |
Minimum [Member] | Office Furniture And Equipment [Member] |  |  |  |  |  |  |
Property, Plant and Equipment, Useful Life |  |  | 3 years |  |  |  |
Minimum [Member] | Computer Equipment [Member] |  |  |  |  |  |  |
Property, Plant and Equipment, Useful Life |  |  | 3 years |  |  |  |
Minimum [Member] | Land, Buildings and Improvements [Member] |  |  |  |  |  |  |
Property, Plant and Equipment, Useful Life |  |  | 10 years |  |  |  |
Maximum [Member] |  |  |  |  |  |  |
Property, Plant and Equipment, Useful Life |  |  | 39 years |  |  |  |
Finite-Lived Intangible Asset, Useful Life |  |  | 10 years |  |  |  |
Maximum [Member] | Equipment [Member] |  |  |  |  |  |  |
Property, Plant and Equipment, Useful Life |  |  | 15 years |  |  |  |
Maximum [Member] | Office Furniture And Equipment [Member] |  |  |  |  |  |  |
Property, Plant and Equipment, Useful Life |  |  | 7 years |  |  |  |
Maximum [Member] | Computer Equipment [Member] |  |  |  |  |  |  |
Property, Plant and Equipment, Useful Life |  |  | 5 years |  |  |  |
Maximum [Member] | Land, Buildings and Improvements [Member] |  |  |  |  |  |  |
Property, Plant and Equipment, Useful Life |  |  | 39 years |  |  |  |

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- Definition Amount charged to advertising expense for the period, which are expenses incurred with the objective of increasing revenue for a specified brand, product or product line. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 720 -SubTopic 35 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6420018&loc=d3e36677-107848 + Details
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