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BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Warranty, Accrued Liabilities, and Basic and Diluted Income per Share (Details) - USD ($) $ in Thousands | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2016 | Dec. 31, 2015
Changes in the reserve for product warranty claims |  |  |  |  |
Warranty reserve at beginning of the year | $ 780 | $ 786 | $ 629 |  |
Warranty reserves acquired | 297 |  |  |  |
Provision | (138) | 142 | 234 |  |
Warranty expenditures | (96) | (123) | (40) |  |
Effect of foreign currency translation | (13) | (25) | (37) |  |
Warranty reserve at end of year | 830 | 780 | 786 |  |
Accrued Liabilities |  |  |  |  |
Compensation and fringe benefits |  |  |  | $ 7,379 | $ 7,791
Warranty reserve | $ 780 | $ 786 | $ 629 | 830 | 780
Other accrued expenses |  |  |  | 2,469 | 2,550
Accrued liabilities |  |  |  | $ 10,678 | $ 11,121
Basic and Diluted Income per Share from Continuing Operations |  |  |  |  |
Dilutive effect of outstanding stock option awards (in shares) | 94,000 | 10,000 | 20,000 |  |
Stock awards excluded from the calculation of diluted income per share (in shares) | 30,700 | 0 | 0 |  |
Minimum |  |  |  |  |
Warranty |  |  |  |  |
Warranty period | 3 months |  |  |  |
Maximum |  |  |  |  |
Warranty |  |  |  |  |
Warranty period | 2 years |  |  |  |

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