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Other Current Assets	12 Months Ended
Other Current Assets	Dec. 31, 2019
Other Current Assets
Other Current Assets	4.Other Current Assets As of December 31, 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 $0.6 million and prepaid insurance of $0.2 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.