SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Fair Value of Financial Instruments (Details) $ in Thousands, € in Millions	3 Months Ended
	Mar. 31, 2016 USD ($)	Mar. 31, 2015 USD ($)	Mar. 31, 2016 EUR (€) derivative	Mar. 31, 2016 USD ($) derivative	Jan. 31, 2016 derivative	Dec. 31, 2015 USD ($)
Liabilities:
Unrealized loss in foreign currency transaction	$ 400
Change in the contingent consideration liability
Beginning Balance	4,019	$ 4,825
Payment of contingent consideration	(200)
Acquisition	881
Change in fair value of contingent consideration	(35)
Accretion of contingent consideration	51	47
Unrealized gain (loss) related to currency translation	62	(116)
Ending Balance	4,778	$ 4,756
Foreign exchange forward | Not designated as hedges
Liabilities:
Number of foreign currency derivatives | derivative			3	3	4
Notional amount of foreign currency derivatives			€ 7.7	$ 8,400
Saugatuck Technology Inc.
Change in the contingent consideration liability
Ending Balance	$ 900
Minimum
Liabilities:
Discounted rate of cash outflow projections (as a percent)	2.30%
Incremental borrowing rate used to discount future cash flows from financial instruments (as a percent)	2.56%
Maximum
Liabilities:
Discounted rate of cash outflow projections (as a percent)	14.50%
Incremental borrowing rate used to discount future cash flows from financial instruments (as a percent)	2.75%
Recurring
Assets:
Cash equivalents				20		$ 20
Total				20		20
Liabilities:
Contingent consideration				4,778		4,019
Foreign currency exchange forward contract				393
Long-term debt , including current portion				50,218		50,829
Total				55,389		54,848
Recurring | Level 1
Assets:
Cash equivalents				20		20
Total				20		20
Recurring | Level 2
Liabilities:
Foreign currency exchange forward contract				393
Total				393
Recurring | Level 3
Liabilities:
Contingent consideration				4,778		4,019
Long-term debt , including current portion				50,218		50,829
Total				$ 54,996		$ 54,848