Inventory (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2019	Dec. 31, 2018
Inventory [Line Items]
Inventory, Raw Materials, Gross		$ 6,125	$ 6,214
Inventory, Work in Process, Gross		1,089	549
Inventory, Finished Goods, Gross		8,333	12,179
Inventory, Net	[1]	15,547	18,942
Production Related Impairments or Charges		100
Deferred Costs and Other Assets		$ 100	$ 500

[1] unaudited