LOAN PAYABLE (Details) - USD ($) $ / shares in Units, $ in Thousands		1 Months Ended	12 Months Ended
	May. 01, 2015	Oct. 31, 2012	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Loans Payable
Interest expense			$ 126
MassDev
Loans Payable
Line of credit for the purchase of capital equipment		$ 2,000
Line of credit for working capital purpose		$ 200
Interest expense				$ 127	$ 120
Additional disclosure
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
Amount of monthly principal payment	$ 41
Commencement date of monthly installments			May 01, 2015
Future Principal payment due: 2016			$ 395
Future Principal payment due : 2017			423
Future Principal payment due : 2018			451
Future Principal payment due : 2019			400
MassDev | Warrants
Loans Payable
Number of shares into which a warrant may be converted		9,037
Warrant period		7 years
Exercise price of warrant (in dollars per share)		$ 6.64
Additional disclosure
Approximate fair value of warrant		$ 32
Amortization period of deferred financing cost		7 years
Amortization of deferred financing costs			$ 5	5	$ 5
MassDev | Equipment Line of Credit
Additional disclosure
Withdrawal for capital equipment				$ 342