FAIR VALUE MEASUREMENT - Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) (Fair Value, Measurements, Recurring, USD $) In Thousands, unless otherwise specified	Mar. 30, 2014	Dec. 31, 2013
Fair Value, Inputs, Level 1
Assets measured at fair value:
Total assets measured at fair value	$ 11,881	$ 1,880
Fair Value, Inputs, Level 1 | Money Market Funds
Assets measured at fair value:
Cash and cash equivalents	11,881	1,880
Fair Value Disclosure, Total
Assets measured at fair value:
Total assets measured at fair value	11,881	1,880
Fair Value Disclosure, Total | Money Market Funds
Assets measured at fair value:
Cash and cash equivalents	$ 11,881	$ 1,880