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Supplemental Financial Information - Prepaid expenses and other assets and Other assets (Details) - USD ($)
$ in Thousands
Jun. 30, 2017
Dec. 31, 2016
Prepaid expenses and other assets:    
Prepaid expenses $ 1,658 $ 1,169
Other 78 188
Other current assets 1,736 1,357
Other long-term assets:    
Deposits 223 263
Intangibles 758 696
Other 730 323
Total $ 1,711 $ 1,282