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Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands | Dec. 31, 2016 | Dec. 31, 2015
--- | --- | ---
Other assets noncurrent: |  |
Trademarks and other intangibles, accumulated amortization | $ 10,733 | $ 7,997
Shareholders' equity: |  |
Preferred stock, par value | $ 0.01 | $ 0.01
Preferred stock, shares authorized | 5,000,000 | 5,000,000
Preferred stock, shares issued | 0 | 0
Common stock, par value | $ 0.01 | $ 0.01
Common stock, shares authorized | 75,000,000 | 75,000,000
Common stock, shares issued | 34,230,000 | 29,766,000
Treasury stock at cost, shares | 1,356,000 | 1,265,000
Series A Junior Participating Preferred Stock [Member] |  |
Shareholders' equity: |  |
Preferred stock, shares authorized | 2,000,000 | 2,000,000
Preferred stock, shares issued | 0 | 0
Convertible Preferred Stock [Member] |  |
Shareholders' equity: |  |
Preferred stock, shares authorized | 460,000 | 460,000
Preferred stock, shares issued | 0 | 0
Patents [Member] |  |
Other assets noncurrent: |  |
Accumulated amortization | $ 2,702 | $ 2,664

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