STOCK BASED COMPENSATION (Details) - USD ($) $ in Thousands	1 Months Ended		3 Months Ended		9 Months Ended		52 Months Ended
	Jan. 31, 2019	Mar. 31, 2015	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Dec. 31, 2018	Apr. 30, 2015
Stock options
Stock-based compensation (in dollars)			$ 68	$ 85	$ 203	$ 541
Stock Options
Stock options
Granted (in shares)					90,000
Expected term					10 years
Stock-based compensation (in dollars)			$ 42		$ 126
2010 Plan
Stock options
Granted (in shares)							0
Expected term					10 years
2015 Plan
Stock options
Shares available for future grants			2,046		2,046		2,046
Shares authorized for issuance									160,000
Expected term					10 years
2007 Plan
Stock options
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
Aggregate number of shares reserved for issuance			7,923		7,923		7,923	7,923
Offering Period	6 months
Stock-based compensation (in dollars)			$ 0	$ 1	$ 0	$ 1
Employee Stock Purchase Plan | Maximum
Stock options
Aggregate number of shares reserved for issuance		50,000
Common Stock
Stock options
Stock issued under ESPP (in shares)			0	945	1,065	1,133
Common Stock | Employee Stock Purchase Plan
Stock options
Stock issued under ESPP (in shares)	1,065