Disaggregated Revenues

12 Months Ended

Dec. 31, 2019

Disaggregation of Revenue [Abstract]

Disaggregated Revenues

Disaggregated Revenues

The following tables summarize the disaggregation of revenue by nature (dollars in thousands):

	Years Ended December 31,
	2019		2018		2017
Net product sales
Trokendi XR	$	295,214	$	315,295	$	226,518
Oxtellar XR	88,186		84,576		67,579
Total net product sales	383,400		399,871		294,097
Royalty revenues	9,355		8,276		6,367
Licensing revenues	—		750		1,774
Total revenues	$	392,755	$	408,897	$	302,238

Trokendi XR accounted for more than 70% of the Company’s total net product sales in 2019, 2018 and 2017.

The Company recognized noncash royalty revenue of $6.9 million, $5.9 million and $5.3 million for the years ended December 31, 2019, 2018 and 2017, respectively, consequent to the Company's agreement with HC Royalty (see Note 2).

For the year ended December 31, 2019, revenues recognized from performance obligations related to prior periods (for example, due to changes in transaction price) were not material in the aggregate, to either Net Product Sales or to Royalty Revenue.