Leases - Shcedule of Supplemental Balance Sheet Information Related to Finance and Operating Leases (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Jan. 02, 2019	Dec. 31, 2018	Mar. 31, 2018
Leases [Abstract]
Finance lease right-of-use assets included within property and equipment, net	$ 2,472
Current finance lease liabilities included within other current liabilities	445
Non-current finance lease liabilities included within other long-term liabilities	1,446
Total	1,891			$ 1,891
Current operating lease liabilities included within other current liabilities	1,482
Operating lease liabilities - non current	3,566	$ 3,948
Total	$ 5,048			$ 5,048