COMMITMENTS AND CONTINGENCIES - Narrative (Details) $ in Thousands |
3 Months Ended | 6 Months Ended | 12 Months Ended | |||||
---|---|---|---|---|---|---|---|---|
Jun. 30, 2018
USD ($)
|
Jun. 30, 2017
USD ($)
|
Jun. 30, 2018
USD ($)
|
Jun. 30, 2017
USD ($)
|
Dec. 31, 2017
USD ($)
|
Dec. 31, 2016
USD ($)
ft²
|
Oct. 31, 2016
USD ($)
ft²
|
Jan. 20, 2016
ft²
|
|
Loss Contingencies [Line Items] | ||||||||
Rent expense | $ 272 | $ 268 | $ 512 | $ 448 | ||||
Area of real estate property | ft² | 29,622 | |||||||
Security deposit | $ 307 | |||||||
Operating leases, landlord reimbursement for lease improvements | $ 889 | |||||||
Operating leases, landlord reimb for lease improvements, additional payments | $ 444 | |||||||
Loss on contract termination | $ 2,641 | |||||||
Subsidiaries | ||||||||
Loss Contingencies [Line Items] | ||||||||
Area of real estate property | ft² | 4,100 | |||||||
Six Hundred Fifty Suffolk Street, Lowell, Massachusetts | ||||||||
Loss Contingencies [Line Items] | ||||||||
Area of real estate property | ft² | 13,702 | |||||||
CJ CheilJedang Corporation | ||||||||
Loss Contingencies [Line Items] | ||||||||
Area of real estate property | ft² | 9,874 | |||||||
Security deposit | $ 103 | |||||||
Future minimum payments due | $ 6,404 | $ 6,404 |