LOAN PAYABLE (Details) - USD ($) $ / shares in Units, $ in Thousands			1 Months Ended	3 Months Ended
	May 03, 2018	May 01, 2015	Oct. 31, 2012	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017	Mar. 31, 2016
Common Stock
Loans Payable
Number of shares into which a warrant may be converted						23,102
Common Stock | Public Offering, March 2016
Loans Payable
Number of shares into which a warrant may be converted							85,869
Warrants. | Public Offering, March 2016
Loans Payable
Exercise price of warrant (in dollars per share)							$ 250.00
Fair value of warrants							$ 11,726
Equipment Line of Credit
Loans Payable
Interest expense				$ 14	$ 20
MassDev
Loans Payable
Line of credit, maximum			$ 2,000
Line of credit for working capital purpose			$ 200
Fixed interest rate (as a percent)			6.50%
Period for interest-only payments			30 months
Period for charging equal installments of interest and principal			54 months
Maturity date			Oct. 05, 2019
Commencement date of monthly installments		May 01, 2015
Amount of monthly payment		$ 41
Future Principal payment due remainder of year : 2018				341
Future Principal payment due : 2019				400
MassDev | Subsequent event
Loans Payable
Principal paydown commitment	$ 300
MassDev | Common Stock
Loans Payable
Number of shares into which a warrant may be converted			362
MassDev | Warrants.
Loans Payable
Warrant period			7 years
Exercise price of warrant (in dollars per share)			$ 166.00
Fair value of warrants			$ 32
MassDev | Warrants. | Interest Expense
Loans Payable
Amortization of warrant				$ 1	$ 1