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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Fair Value Measurements (Details) (USD $)
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Dec. 31, 2013
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Dec. 31, 2012
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Fair Value [Member]
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| Cash and cash equivalents | $ 18,938,000 | $ 21,983,000 |
| Corporate bond | 530,000 | 547,000 |
| Total | 19,468,000 | 22,530,000 |
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Fair Value, Inputs, Level 1 [Member]
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| Cash and cash equivalents | 18,938,000 | 21,983,000 |
| Corporate bond | ||
| Total | 18,938,000 | 21,983,000 |
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Fair Value, Inputs, Level 2 [Member]
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| Cash and cash equivalents | ||
| Corporate bond | 530,000 | 547,000 |
| Total | 530,000 | 547,000 |
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Fair Value, Inputs, Level 3 [Member]
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| Cash and cash equivalents | ||
| Corporate bond | ||
| Total |