Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2018

Accounting Policies [Abstract]

Schedule of Intangible Assets

Intangible assets consist of the following at December 31, 2018 (in thousands).

	Amount		Accumulated Amortization			Net Amount		Useful Lives (years)
Patents and merger costs	$	22,003	$	(3,534	)	$	18,469		11
Total	$	22,003	$	(3,534	)	$	18,469

Schedule of Future Amortization Expense

Future amortization expense for intangible assets over their remaining useful lives is as follows (in thousands).

Year ending December 31	Patents and trademarks
2019	$	1,944
2020		1,944
2021		1,944
2022		1,944
2023		1,944
2024 and thereafter		8,749
Total	$	18,469