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COMMITMENTS AND CONTINGENCIES (Narrative) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Guarantor Obligations [Line Items] |  |  |
Rent expenses | $ 2,568 | $ 2,548 | $ 2,966
Outstanding inventory purchase commitments | 13,494 | 14,213 |
Inventory purchase commitments, sole or limited suppliers | 5,530 | 3,789 |
Amount of claim, including interest, penalties and legal fees | 10,100 |  |
Principal Amount of Claim | 1,200 |  |
Aggregate amount of guarantees | 139,676 |  |
Restricted cash collateral | 24,143 |  |
Peru [Member] |  |  |
Guarantor Obligations [Line Items] |  |  |
Aggregate amount of guarantees | $ 135,844 |  |
OCS [Member] |  |  |
Guarantor Obligations [Line Items] |  |  |
Percentage of amount funded for research and development projects | 100.00% |  |
Accrued royalties | $ 1,237 | 749 |
OCS [Member] | Minimum [Member] |  |  |
Guarantor Obligations [Line Items] |  |  |
Royalty fee (as a percent) | 3.00% |  |
OCS [Member] | Maximum [Member] |  |  |
Guarantor Obligations [Line Items] |  |  |
Royalty fee (as a percent) | 5.00% |  |
BIRD [Member] |  |  |
Guarantor Obligations [Line Items] |  |  |
Royalty fee (as a percent) | 5.00% |  |
Percentage of amount funded for research and development projects | 150.00% |  |
Accrued royalties | $ 121 | 121 |
Spacenet Inc. [Member] |  |  |
Guarantor Obligations [Line Items] |  |  |
Service expenses | $ 10,278 | $ 8,333 | $ 7,913

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