SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Fair Value of Financial Instruments (Details)	12 Months Ended
	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Jan. 31, 2016 contract
Liabilities:
Transfers of financial assets between Level 1 and Level 2	$ 0
Transfers of financial assets between Level 2 and Level 1	0
Number of foreign currency derivatives | contract			4
Long term debt	125,289,000	$ 50,800,000
Change in the contingent consideration liability
Beginning Balance	4,019,000	4,825,000
Payment of contingent consideration	(3,954,000)	(2,322,000)
Acquisition	4,946,000	986,000
Change in fair value of contingent consideration	(210,000)	468,000
Accretion of contingent consideration	1,259,000	259,000
Unrealized gain (loss) related to currency translation	13,000	(197,000)
Ending Balance	6,073,000	4,019,000
Saugatuck Technology Inc.
Change in the contingent consideration liability
Ending Balance	$ 1,000,000
Minimum
Liabilities:
Discounted rate of cash outflow projections (as a percent)	13.50%
Incremental borrowing rate used to discount future cash flows from financial instruments (as a percent)	2.00%
Maximum
Liabilities:
Discounted rate of cash outflow projections (as a percent)	19.80%
Incremental borrowing rate used to discount future cash flows from financial instruments (as a percent)	4.50%
Level 3
Liabilities:
Long-term debt , including current portion	$ 124,900,000	50,800,000
Fair value of outstanding borrowing	124,900,000	50,800,000
Recurring
Assets:
Cash equivalents	22,000	20,000
Total	22,000	20,000
Liabilities:
Contingent consideration	6,073,000	4,019,000
Total	6,073,000	4,019,000
Recurring | Level 1
Assets:
Cash equivalents	22,000	20,000
Total	22,000	20,000
Recurring | Level 3
Liabilities:
Contingent consideration	6,073,000	4,019,000
Total	$ 6,073,000	$ 4,019,000