COMMITTMENTS AND CONTINGENCIES - Fair Value Supply Agreement (Details) - Supply Commitments - Fair Value, Inputs, Level 3 - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Accrued expenses and other short-term liabilities | Supply Agreement Liability Short-term
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, Beginning of Period	$ 166	$ 1,991
Payments	(166)	(1,500)
Transfer from long-term to current portion	0	161
Balance, End of Period	0	665
Accrued expenses and other short-term liabilities | Supply Agreement Liability Short-term | Selling, general and administrative
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Loss from increase in fair value	0	13
Accrued expenses and other short-term liabilities | Supply Agreement Liability Short-term | Goodwill
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Other		0
Accrued expenses and other short-term liabilities | Supply Agreement Liability Long-term
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, Beginning of Period		161
Transfer from long-term to current portion		(161)
Balance, End of Period		0
Accrued expenses and other short-term liabilities | Supply Agreement Liability Long-term | Selling, general and administrative
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Loss from increase in fair value		0
Accrued expenses and other short-term liabilities | Supply Agreement Liability Long-term | Goodwill
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Other		0
Accrued expenses and other short-term liabilities | Above Market Supply Agreement Liability
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, Beginning of Period	0
Payments
Transfer from long-term to current portion	3,216
Balance, End of Period	2,864
Accrued expenses and other short-term liabilities | Above Market Supply Agreement Liability | Selling, general and administrative
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Loss from increase in fair value	(352)
Other Long-term Liabilities | Above Market Supply Agreement Liability
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, Beginning of Period	2,648	931
Payments	(415)	0
Transfer from long-term to current portion	(3,216)	0
Balance, End of Period	57	2,621
Other Long-term Liabilities | Above Market Supply Agreement Liability | Selling, general and administrative
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Loss from increase in fair value	$ 1,040	1,009
Other Long-term Liabilities | Above Market Supply Agreement Liability | Goodwill
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Other		$ 681