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Note 18 - Valuation and Qualifying Accounts - Schedule of Valuation and Qualifying Accounts (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Allowance for Doubtful Accounts [Member] |  |  |  |
Balance at Beginning of Year |  | $ 2,494 | $ 2,275 | $ 2,658
Reserves Established for Acquisitions |  | 1,654 | 481 | 672
Additions Charged to Earnings |  | (1,110) | (325) | (1,264)
Charges to Reserve, Net | [1] | 2,604 | 63 | 209
Balance at End of Year |  | 5,642 | 2,494 | 2,275
Inventory Valuation Reserve [Member] |  |  |  |
Balance at Beginning of Year |  | 10,582 | 9,387 | 6,558
Reserves Established for Acquisitions |  | 5,359 | 3,739 | 2,797
Additions Charged to Earnings |  | (5,357) | (3,158) | (2,250)
Charges to Reserve, Net | [1] | 2,447 | 614 | 2,282
Balance at End of Year |  | 13,031 | 10,582 | 9,387
Valuation Allowance of Deferred Tax Assets [Member] |  |  |  |
Balance at Beginning of Year |  | 1,523 | 1,385 | 1,021
Reserves Established for Acquisitions |  | 638 | 138 | 364
Additions Charged to Earnings |  |  |  |
Charges to Reserve, Net | [1] | 2,201 |  |
Balance at End of Year |  | $ 4,362 | $ 1,523 | $ 1,385
[1] | Deductions from the allowance for doubtful accounts equal accounts receivable written off, less recoveries, against the allowance. Deductions from the reserves for inventory excess and obsolete items equal inventory written off against the reserve as items were disposed of.

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- Definition Total of allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability established to represent expected future costs. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690 + Details
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- Definition Amount of increase in the allowances and reserves, which consist of the valuation and qualifying accounts that are either netted against the cost of an asset or that reflect a liability established to represent expected future costs, from charges to costs and expenses. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690 + Details
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- Definition Amount of increase (decrease) in allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset or that reflect a liability established to represent expected future costs. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690 + Details
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- Definition Total of allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability established to represent expected future costs, acquired in a business combination. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690 + Details
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