Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2018

Commitments and Contingencies Disclosure [Abstract]

Estimated annual lease, royalty, and employment agreement expenses

The estimated annual lease payment and meeting space commitments are as follows (in thousands):

Years Ended December 31,
2019	$	2,605
2020	2,370
2021	1,625
2022	1,673
2023	205
Thereafter	—
	$	8,478