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Cash, Cash Equivalents, and Restricted Cash	6 Months Ended
Cash, Cash Equivalents, and Restricted Cash	Jun. 30, 2019
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents [Abstract]
Cash, Cash Equivalents, and Restricted Cash	Cash, Cash Equivalents, and Restricted Cash Restricted cash at June 30, 2019 and December 31, 2018 includes $0.7 million and $0.6 million respectively, in cash accounts held as collateral primarily under the terms of an office operating lease, credit card agreement and automobile leases.