STOCK BASED COMPENSATION (Details) - USD ($) $ in Thousands		1 Months Ended	3 Months Ended		12 Months Ended	34 Months Ended
	Jan. 01, 2017	Jan. 31, 2018	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017	Mar. 31, 2018	Apr. 30, 2015	Mar. 31, 2015
Stock options
Stock-based compensation (in dollars)			$ 306	$ 1,315
Stock option modification (in dollars)				24
Stock Options
Stock options
Shares outstanding			81,011		134,770	81,011
Granted (in shares)			3,000
Stock-based compensation (in dollars)			$ 250
2007 Plan
Stock options
Shares outstanding			1,859		1,859	1,859
Shares available for future grants			0			0
Expected term			10 years
2010 Plan
Stock options
Shares outstanding			27,252		57,786	27,252
Shares available for future grants			12,894			12,894
Expected term			10 years
Granted (in shares)						0
2015 Plan
Stock options
Shares outstanding			48,599		75,125	48,599
Shares available for future grants			160,199			160,199
Shares authorized for issuance							160,000
Expected term			10 years
Employee Stock Purchase Plan
Stock options
Shares authorized for issuance								7,500
Percentage of outstanding shares reserved for future issuance			1.00%
Increase in shares of common stock reserved for issuance (in shares)			2,000
Maximum aggregate number of shares reserved for issuance during term of employee stock purchase plan			9,933		9,933	9,933
Stock issued under ESPP (in shares)		188
Offering Period			6 months
Stock-based compensation (in dollars)			$ 1	$ 4
Employee Stock Purchase Plan | Maximum
Stock options
Maximum aggregate number of shares reserved for issuance during term of employee stock purchase plan			50,000			50,000
Common Stock
Stock options
Stock issued under ESPP (in shares)			188		710
Accrued expenses. | Employee Stock Purchase Plan
Stock options
Employee payroll deductions (in dollars)			$ 1
ASU 2016-09
Stock options
Cumulative effect adjustment (in dollars)	$ 155