SHAREHOLDERS' EQUITY (Details) - Cowen - USD ($)		3 Months Ended
	Oct. 10, 2016	Dec. 31, 2016	Mar. 31, 2017
Class of Stock [Line Items]
At-the-market sales agreement, maximum aggregate proceeds	$ 25,000,000.0
At-the-market sales agreement, proceeds from issuance of common stock		$ 800,000
Amount of net capacity remaining on the at-the-market sales agreement			$ 24,200,000
Common Class A
Class of Stock [Line Items]
At-the-market sales agreement, shares issued (in shares)		357,856
Maximum
Class of Stock [Line Items]
Percentage of gross proceeds payable as commission	3.00%