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COMMITMENTS AND CONTINGENCIES (Royalty Commitments) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Long-term Purchase Commitment [Line Items] |  |  |
Proceeds from grants received | $ 215 | $ 55 | $ 150
OCS [Member] |  |  |
Long-term Purchase Commitment [Line Items] |  |  |
Royalty rates | 3.50% |  |
Percent of grants received paid in royalties | 100.00% |  |
Total commitment with respect to royalty-bearing participation received, net of royalties paid | $ 40,693 |  |
Proceeds from grants received | 38,442 |  |
Accumulated interest, grants | 13,995 |  |
Accumulated royalties paid | 11,744 |  |
Royalty expenses | $ 655 | $ 827 | $ 706
BIRD-F [Member] |  |  |
Long-term Purchase Commitment [Line Items] |  |  |
Royalty rates | 5.00% |  |
Percent of grants received paid in royalties | 150.00% |  |
Proceeds from grants received | $ 359 |  |
Royalties due based on stated percentage | 798 |  |
Linkage to the United States Consumer Price Index | 439 |  |
Accumulated royalties paid | $ 359 |  |
MOE [Member] |  |  |
Long-term Purchase Commitment [Line Items] |  |  |
Royalty rates | 3.00% |  |
Proceeds from grants received | $ 523 |  |
Maximum term for required royalty payments | 5 years |  |

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- Definition Carrying value as of the balance sheet date of obligations incurred through that date and payable for royalties. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.15(5)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.15(a)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
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