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Description of Business and Basis of Presentation - Schedule of Error Corrections (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Error Corrections and Prior Period Adjustments
Prepaid expenses and other assets	$ 1,897	$ 1,844
Accrued expenses	1,265	1,273
Accumulated deficit	$ (38,090)	(33,615)
Immaterial Error Corrections
Error Corrections and Prior Period Adjustments
Prepaid expenses and other assets		933
Accrued expenses		(96)
Accumulated deficit		$ 1,028

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