STOCKHOLDERS' EQUITY (Details) - USD ($)			3 Months Ended		12 Months Ended
	Apr. 06, 2018	Mar. 27, 2018	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018	Nov. 26, 2018
Class of Stock [Line Items]
Common stock, shares authorized			47,000,000		47,000,000
New shares issued (in shares)			0
Net proceeds from units issued in the period				$ 18,381,000
Preferred stock, shares authorized			3,000,000		3,000,000
Loss Per Share
Total shares excluded from net loss per share attributable to common stockholders			7,087,528	6,101,177
Common stock warrants
Loss Per Share
Total shares excluded from net loss per share attributable to common stockholders			3,245,100	3,465,256
Common stock options
Stock Repurchase Program [Abstract]
Shares authorized, amount						$ 4,000,000.0
Stock repurchased during period (in shares)			0
Stock repurchased during period					$ 152,000
Loss Per Share
Total shares excluded from net loss per share attributable to common stockholders			1,294,028	1,080,152
Non-vested restricted stock unit awards
Loss Per Share
Total shares excluded from net loss per share attributable to common stockholders			2,548,400	1,555,769
Common stock options
Class of Stock [Line Items]
New shares issued (in shares)		5,714,286		5,714,286
Share price (in dollars per share)		$ 3.50
Net proceeds from the sale of common stock from private placement offering		$ 20,000,000
Net proceeds from units issued in the period		$ 18,400,000		$ 6,000
Over-Allotment Option | Common stock options
Class of Stock [Line Items]
New shares issued (in shares)	857,142
Share price (in dollars per share)	$ 3.50
Net proceeds from the sale of common stock from private placement offering	$ 3,000,000
Net proceeds from units issued in the period	$ 2,800,000