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PREPAID EXPENSES AND OTHER ASSETS - Summary of other noncurrent assets (Details 1) (USD $)
In Thousands, unless otherwise specified |
Dec. 31, 2013
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Oct. 31, 2013
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Dec. 31, 2012
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|---|---|---|---|
| Other Assets, Noncurrent Disclosure [Abstract] | |||
| Prepaid carrier fees | $ 1,658 | $ 1,879 | |
| Cost method investments | 200 | 300 | 522 |
| Deposits | 168 | 186 | |
| Other | 272 | 102 | |
| Total other noncurrent assets | $ 2,298 | $ 2,689 |