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RETIREMENT SAVINGS PLANS	12 Months Ended
RETIREMENT SAVINGS PLANS	Dec. 31, 2018
RETIREMENT SAVINGS PLANS [Abstract]
RETIREMENT SAVINGS PLANS	10. RETIREMENT SAVINGS PLANS Substantially all of our employees in the United States are eligible to participate in a qualified defined contribution 401(k) plan. Participants may elect to have a specified portion of their salary contributed to the plan, and we may make discretionary contributions to the plan. We made contributions totaling $49,000 and $81,000 to the plans for 2018 and 2017, respectively.