LOAN PAYABLE (Details) - USD ($) $ / shares in Units, $ in Thousands		1 Months Ended	12 Months Ended
	May 01, 2015	Oct. 31, 2012	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Loans Payable
Fair value of warrants			$ 90	$ 251
Interest expense			$ 155	172	$ 136
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 charging 6.5% interest rate		30 months
Period for charging equal interest and principal payments		54 months
Maturity date		Oct. 05, 2019
Commencement date of monthly installments			May 01, 2015
Amount of monthly principal payment	$ 41
Future Principal payment due: 2017			$ 423
Future Principal payment due : 2018			452
Future Principal payment due : 2019			400
MassDev | Common Stock
Loans Payable
Number of shares into which a warrant may be converted		9,037
MassDev | Warrants
Loans Payable
Warrant period		7 years
Exercise price of warrant (in dollars per share)		$ 6.64
Fair value of warrants		$ 32
MassDev | Warrants | Interest Expense
Loans Payable
Amortization of deferred financing costs			5	5	5
MassDev | Equipment Line of Credit
Loans Payable
Interest expense			$ 99	$ 126	$ 127