FAIR VALUE OF FINANCIAL INSTRUMENTS - Assets and Liabilities Measured at Fair Value on Non-Recurring Basis (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Assets:
Cost method investment	$ 12,333	$ 12,333
GreenerU Inc
Assets:
Cost method investment	309
Recycle Rewards Inc
Assets:
Cost method investment	$ 1,069
Quoted Prices in Active Markets for Identical Assets (Level 1) | Fair Value, Measurements, Nonrecurring
Assets:
Cost method investment		0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Fair Value, Measurements, Nonrecurring | GreenerU Inc
Assets:
Cost method investment		0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Fair Value, Measurements, Nonrecurring | Recycle Rewards Inc
Assets:
Cost method investment		0
Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Nonrecurring
Assets:
Cost method investment		0
Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Nonrecurring | GreenerU Inc
Assets:
Cost method investment		0
Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Nonrecurring | Recycle Rewards Inc
Assets:
Cost method investment		0
Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Nonrecurring
Assets:
Cost method investment		1,378
Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Nonrecurring | GreenerU Inc
Assets:
Cost method investment		309
Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Nonrecurring | Recycle Rewards Inc
Assets:
Cost method investment		$ 1,069