SUBSEQUENT EVENTS (Details) - Subsequent events	Feb. 28, 2018 USD ($) ft² item	Jan. 09, 2018 USD ($)
Lake Forest Illinois Building
Subsequent events
Square feet agreed to lease | ft²	31,209
Lease terms	5 years 6 months
Number of renewal periods | item	1
Renewal terms	5 years
Written notice period (in months)	12 months
Temporary space available to use | ft²	6,700
Initial annual base rent (per square foot)	$ 18.00
Annual increase in base rent (per square foot)	$ 0.50
Number of months rent is abated	6 months
Tenant improvement allowance (per square foot)	$ 28.00
Collegium | NUCYNTA products | Commercialization Agreement
Subsequent events
Minimum annual royalties		$ 135,000,000
Minimum royalty period (in years)		4 years
Termination fee the Company could pay		$ 80,000,000
Period of notice (in months)		12 months
Termination fee Collegium could pay		$ 25,000,000