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K. INCOME TAXES - NARRATIVE (Details) - USD ($) | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Windfall tax benefits unrecognized | $ 1,300,000 |  |  |
Valuation allowance increase (decrease) | 13,100,000 | $ 2,100,000 |  |
Valuation allowance | 1,663,000 | 14,726,000 |  |
Net operating loss carryforward | $ 37,700,000 |  |  |
Loss carryforward expiration date | Dec. 31, 2032 |  |  |
Research and development tax credits | $ 1,500,000 |  |  |
Research and development tax credit expiration date | Dec. 31, 2036 |  |  |
Federal income tax rate | 35.00% |  |  |
China income tax rate | 25.00% |  |  |
Provision on foreign subsidiariess | $ 6,600,000 |  |  |
Impact on effective tax rate | 1,800,000 |  |  |
Unrecognized tax benefits | 1,797,000 | 1,797,000 | $ 1,659,000 | $ 2,200,000
Accrued penalties or interest |  | $ 0 |  |
CHINA |  |  |  |
Net operating loss carryforward | $ 8,300,000 |  |  |
Loss carryforward expiration date | Dec. 31, 2021 |  |  |
Global [Member] |  |  |  |
China income tax rate | 15.00% |  |  |
Tax rate effective period | 3 years |  |  |
Extended period of tax preferential status | 3 years |  |  |

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