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Note 12 - Share-based Compensation (Tables) | 12 Months Ended
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Dec. 31, 2016
Notes Tables |
Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block] |
|  | Year ended December 31, |
|  | 2016 |  |  | 2015 |  |  | 2014 |
Cost of sales |  | $ | 422 |  |  | $ | 412 |  |  | $ | 337 |
Selling, general and administrative expense |  |  | 1,379 |  |  |  | 1,362 |  |  |  | 2,609 |
Total |  | $ | 1,801 |  |  | $ | 1,774 |  |  | $ | 2,946 |
Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block] |
|  | Options |  |  | Weighted Average Exercise Price |  |  | Weighted Average Remaining Contractual Life |  |  | Aggregate Intrinsic Value |
|  |  |  |  |  |  |  |  |  | (in years) |  |  | (in thousands) |
Balance, December 31, 2015 |  |  | 28,000 |  |  | $ | 25.21 |  |  |  |  |  |  |  |  |
Options granted |  |  | - |  |  |  | - |  |  |  |  |  |  |  |  |
Options exercised |  |  | - |  |  |  | - |  |  |  |  |  |  |  |  |
Options canceled |  |  | (2,000 | ) |  |  | 28.31 |  |  |  |  |  |  |  |  |
Balance, December 31, 2016 |  |  | 26,000 |  |  |  | 24.97 |  |  |  |  |  |  |  |  |
Exercisable, December 31, 2016 |  |  | 26,000 |  |  |  | 24.97 |  |  |  | 3.03 |  |  | $ | - |
Schedule of Share-based Payment Award, Employee Stock Purchase Plan, Valuation Assumptions [Table Text Block] |
Expected stock price volatility |  | 23.7% | - | 65.0% |
Risk free interest rate |  | 0.61% |
Expected dividend yield |  | 0% |
Schedule of Unvested Restricted Stock Units Roll Forward [Table Text Block] |
|  | Number of RSUs and PSAs (1) |  |  | Weighted Average Grant Date Fair Value |
Unvested RSUs and PSAs at December 31, 2015 |  |  | 127,852 |  |  | $ | 38.87 |
RSUs and PSAs granted |  |  | 169,583 |  |  |  | 9.50 |
Unvested RSUs and PSAs canceled |  |  | (63,432 | ) |  |  | 36.96 |
RSUs and PSAs vested |  |  | (12,212 | ) |  |  | 31.50 |
Unvested RSUs and PSAs at December 31, 2016 |  |  | 221,791 |  |  | $ | 17.36 |

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- Definition Tabular disclosure of the allocation of equity-based compensation costs to a given line item on the balance sheet and income statement for the period. This may include the reporting line for the costs and the amount capitalized and expensed. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14.F) -URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809 + Details
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- Definition Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for share options (or share units) that were outstanding at the beginning and end of the year, vested and expected to vest, exercisable or convertible at the end of the year, and the number of share options or share units that were granted, exercised or converted, forfeited, and expired during the year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of employee stock purchase plans, including, but not limited to: (a) expected term, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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