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Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands | Dec. 31, 2015 | Dec. 31, 2014
--- | --- | ---
Net long-term deferred assets and (liabilities) relating to: |  |
Accounts receivable and inventory reserves | $ 351 | $ 355
Warranty accrual | 3,405 | 3,263
Other accruals | 1,248 | 1,238
Share-based compensation | 1,099 | 707
Donations | 691 | 1,309
Other, net | 986 | 888
Total deferred income tax assets | 7,780 | 7,760
Property & equipment | (16,486) | (15,294)
Total deferred income tax liabilities | (16,486) | (15,294)
Net deferred income tax liabilities | $ 8,706 | $ 7,534

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