DESCRIPTION OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Valuation and Qualifying Accounts Disclosure
Balance, Ending balance	$ 5,104	$ 6,124
Chargebacks
Valuation and Qualifying Accounts Disclosure
Balance, Beginning balance	5,662	3,681
Accruals/adjustments	28,009	22,912
Credits taken against reserve	(29,595)	(20,931)
Balance, Ending balance	4,076	5,662
Returns
Valuation and Qualifying Accounts Disclosure
Balance, Beginning balance	411	252
Accruals/adjustments	1,595	698
Credits taken against reserve	(1,270)	(539)
Balance, Ending balance	736	411
Administrative Fees And Other Rebates
Valuation and Qualifying Accounts Disclosure
Balance, Beginning balance	231	238
Accruals/adjustments	2,355	1,369
Credits taken against reserve	(1,851)	(1,376)
Balance, Ending balance	735	231
Prompt Payment Discounts
Valuation and Qualifying Accounts Disclosure
Balance, Beginning balance	242	166
Accruals/adjustments	1,129	775
Credits taken against reserve	(1,039)	(699)
Balance, Ending balance	$ 332	$ 242