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Note 9 - Financial Instruments and Fair Value (Tables) | 12 Months Ended
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Dec. 31, 2015
Notes Tables |
Fair Value, Assets Measured on Recurring Basis [Table Text Block] |
| At December 31, 2015 |  |  | At December 31, 2014 |
| Level 1 Inputs |  |  | Level 2 Inputs |  |  | Level 3 Inputs |  |  | Level 1 Inputs |  |  | Level 2 Inputs |  |  | Level 3 Inputs |
Investment in auction rate securities | $ | ─ |  |  | $ | ─ |  |  | $ | 6,650 |  |  | $ | ─ |  |  | $ | ─ |  |  | $ | 6,905 |
Schedule of Available-for-sale Securities Reconciliation [Table Text Block] |
|  | C ost Basis Amount |  |  | Gross Unrealized Loss In Accumulated OCI |  |  | Fair Value |
December 31, 201 5 |  |  |  |  |  |  |  |  |  |  |  |
Investment in auction rate securities |  | $ | 7,150 |  |  | $ | 500 |  |  | $ | 6,650 |
December 31, 201 4 |  |  |  |  |  |  |  |  |  |  |  |
Investment in auction rate securities |  | $ | 7,425 |  |  | $ | 520 |  |  | $ | 6,905 |
Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block] |
|  |  |  |  | Fair Value at |
Derivative Liabilities Designated as Hedging Instruments |  | Balance Sheet Location |  |  | December 31, 2015 |  |  | December 31, 2014 |
Interest Rate Swaps |  | Other Long-Term Liabilities |  |  | $ | ─ |  |  | $ | 235 |
Schedule of Derivative Instruments, Effect on Other Comprehensive Income (Loss) [Table Text Block] |
|  | Gain (Loss) Recognized in OCI on Derivatives (Effective Portion) during the Year Ended |  |  | Location of Loss |  |  | Loss Reclassified from Accumulated OCI into Income (Effective Portion) during the Year Ended |
|  | December 31, 201 5 |  |  |  | December 31, 201 4 |  |  | Reclassified into Income |  |  | December 31, 201 5 |  |  | December 31, 201 4 |
Interest rate swaps |  | $ | 235 |  |  | $ | 789 |  |  | Interest Expense |  |  | $ | (55 | ) |  | $ | (196 | )

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- Definition Tabular disclosure of assets, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, by class that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a),(b) -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19190-110258 + Details
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- Definition Tabular disclosure of the reconciliation of available-for-sale securities from cost basis to fair value. + References No definition available. + Details
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- Definition Tabular disclosure of the effective portion of the gains and losses on derivative instruments designated (and non-derivative instruments) designated and qualifying in cash flow hedges and net investment hedges that was recognized in other comprehensive income (loss) during the current period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5624171-113959 + Details
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- Definition Tabular disclosure of the location and fair value amounts of derivative instruments (and nonderivative instruments that are designated and qualify as hedging instruments) reported in the statement of financial position. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5624163-113959 + Details
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