Cost Method Investment and Collaborative Arrangement (Tables)

3 Months Ended

Mar. 31, 2018

Investments, All Other Investments [Abstract]

Schedule Of Periodic Payments For Prepaid Royalties

As of March 31, 2018, expected future royalty prepayments are as follows:

Fiscal year	(in thousands)
2018 (remaining 9 months)	$	2,625
2019	$	5,000