Patents (Tables)

3 Months Ended

Mar. 31, 2019

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Finite-Lived Intangible Assets, Future Amortization Expense

The following table presents the scheduled annual aggregate amortization expense as of March 31, 2019 (in thousands):

For the years ending December 31,
Remainder of 2019	$	2,464
2020	2,421
2021	1,561
2022	1,561
2023	1,486
Thereafter	188
	$	9,681