REVENUE (Tables)

3 Months Ended

Mar. 31, 2020

Revenue from Contract with Customer [Abstract]

Schedule of revenue from contracts with customers

The following table summarizes revenue from contracts with customers for the three months ended March 31, 2020 and 2019 (in thousands):

	Three Months Ended March 31,
	2020		2019
Product sales, net
CAMBIA	$	6,274	$	8,808
Zipsor	2,331		4,231
Gralise	547		13,278
Total neurology product sales, net	9,152		26,317
NUCYNTA and Lazanda product sales adjustments	100		133
Total product sales, net	9,252		26,450
Commercialization agreement, net	11,258		30,856
Royalties and milestone revenue	407		623
Total revenues	$	20,917	$	57,929

Summary of contract assets and liabilities

The following table presents changes in the Company’s contract assets as of March 31, 2020 (in thousands):

	Balance as of				Balance as of
	December 31, 2019	Additions	Deductions		March 31, 2020
Contract asset - Collegium, net	1,896	—	(1,896	)	—