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Accrued Expenses and Other Current Liabilities - Other Current Liabilities (Details) - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Payables and Accruals [Abstract]    
Deferred revenue $ 2,213 $ 211
Reserve for unclaimed property 1,208 1,107
Legal accrual 919 450
Restructure reserves 585 337
Lease settlements reserve 346 278
Other 258 238
Other current liabilities $ 5,529 $ 2,621