STOCK BASED COMPENSATION, SUMMARY OF OPTION ACTIVITY - (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Stock Option
Stock-based compensation (in dollars)	$ 67	$ 306
Stock Options
Summary of option activity - Shares
Outstanding at the beginning of year (in shares)	54,849
Granted (in shares)	90,000
Cancelled/Forfeited (in shares)	(17,459)
Outstanding at the end of period (in shares)	127,390		54,849
Vested at the end of period (in shares)	28,773
Summary of option activity - Weighted Average Exercise Price
Outstanding at the beginning of year (in dollars per shares)	$ 100.83
Granted (in dollars per shares)	1.53
Cancelled/Forfeited (in dollars per shares)	40.12
Outstanding at the end of period (in dollars per shares)	39.00		$ 100.83
Vested at the end of period (in dollars per share)	$ 146.51
Option activity disclosures
Weighted Average Remaining Contractual Term - Outstanding	8 years 9 months		7 years 3 months 26 days
Weighted Average Remaining Contractual Term - Vested	5 years 7 months 28 days
Aggregate Intrinsic Value - Outstanding (in dollars)	$ 2
Stock Option
Weighted average grant-date fair value of options granted	$ 1.25
Total fair value of options vested	$ 36
Stock-based compensation (in dollars)	41
Total unrecognized compensation expense	$ 305
Period for unrecognized compensation expense is estimated to be recognized	2 years 1 month 24 days