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Other Current Assets	6 Months Ended
Other Current Assets	Jun. 30, 2019
Other Current Assets
Other Current Assets	4.Other Current Assets As of June 30, 2019, Other Current Assets included prepaid expenses of $0.8 million, comprised primarily of prepayments made for our clinical trials for prexigebersen in AML and CML of $0.4 million, prepaid insurance of $0.3 million and other prepaid expenses of $0.1 million. As of December 31, 2018, Other Current Assets included prepaid expenses of $0.8 million, comprised primarily of prepayments made for our clinical trial for prexigebersen in AML of $0.6 million, prepaid insurance of $0.1 million and other prepaid expenses of $0.1 million.