LOAN PAYABLE (Details) - USD ($) $ / shares in Units, $ in Thousands		1 Months Ended		6 Months Ended
	May 01, 2015	May 31, 2018	Oct. 31, 2012	Jun. 30, 2020	Jun. 30, 2019
Loans Payable
Number of warrants outstanding				4,745,334
Interest expense					$ 1
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			Mar. 01, 2019
Commencement date of monthly installments	May 01, 2015
Amount of monthly payment	$ 41
Repayment of principal		$ 300		$ 100
Number of warrants outstanding			13
Warrant period			7 years
Exercise price of warrant (in dollars per share)			$ 4,980
Fair value of warrants			$ 32
Amortization				0	$ 1
Interest expense				$ 0