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BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details 3) (USD $) | 12 Months Ended
--- | ---
Dec. 31, 2012 item | Dec. 31, 2011
Changes in the reserve for product warranty claims |  |
Warranty reserve at beginning of the year | $ 372,000 | $ 341,000
Provision | 579,000 | 255,000
Warranty expenditures | (411,000) | (215,000)
Effect of foreign currency translation | 11,000 | (9,000)
Warranty reserve at end of year | 551,000 | 372,000
Expected costs of replacing certain products in the field due to an incorrect electronic component in a printed circuit board | 342,000 |
Number of Company's sub-contract suppliers who supplied an incorrect electronic component | 1 |
Accrued Liabilities |  |
Compensation and fringe benefits | 4,230,000 | 6,525,000
Warranty reserve | 551,000 | 372,000
Other accrued expenses | 1,145,000 | 945,000
Accrued liabilities | $ 5,926,000 | $ 7,842,000
Basic and Diluted Income per Share from Continuing Operations |  |
Dilutive effect of outstanding stock option awards (in shares) | 0 | 138,000
Minimum |  |
Warranty |  |
Warranty period | 12 months |
Maximum |  |
Warranty |  |
Warranty period | 18 months |
Warranty period for majority of products | 12 months |

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