Annual report pursuant to Section 13 and 15(d)

Prepaid Expenses And Other Current Assets & Patents And Intangible Assets - Schedule of Prepaid Expenses (Details)

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Prepaid Expenses And Other Current Assets & Patents And Intangible Assets - Schedule of Prepaid Expenses (Details) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]    
Prepaid income taxes $ 5,429 $ 0
Other prepaid expenses and other current assets 1,151 765
Total $ 6,580 $ 765