FAIR VALUE OF ASSETS AND LIABILITIES (Tables)

12 Months Ended

Dec. 31, 2017

FAIR VALUE OF ASSETS AND LIABILITIES

Summary of assets and liabilities measured at fair value on a recurring basis

	At December 31, 2017
(In thousands)	Level 1		Level 2		Level 3		Fair Value
Cash equivalents	$	12,887	$	—	$	—	$	12,887
Marketable securities	$	—	$	—	$	—	$	—
Derivative warrant liability	$	—	$	4	$	—	$	4

	At December 31, 2016
(In thousands)	Level 1		Level 2		Level 3		Fair Value
Cash equivalents	$	21,353	$	—	$	—	$	21,353
Marketable securities	$	—	$	11,577	$	—	$	11,577
Derivative warrant liability	$	—	$	1,314	$	—	$	1,314