REVENUE (Tables)

6 Months Ended

Jun. 30, 2019

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 and six months ended June 30, 2019 and 2018 (in thousands):

	Three Months Ended June 30,					Six Months Ended June 30,
	2019			2018		2019			2018
Product sales, net
Gralise	$	17,800		$	13,815	$	31,078		$	28,642
CAMBIA	6,758			8,089		15,566			14,505
Zipsor	1,524			3,988		5,755			8,734
Total neurology product sales, net	26,082			25,892		52,399			51,881
NUCYNTA products	(163		)	626		(101		)	18,771
Lazanda	18			320		89			540
Total product sales, net	25,937			26,838		52,387			71,192
Commercialization agreement:
Commercialization rights and facilitation services, net	31,003			31,179		61,859			59,274
Revenue from transfer of inventory	—			—		—			55,705
Royalties and milestone revenue	263			5,257		886			5,507
Total revenues	$	57,203		$	63,274	$	115,132		$	191,678

Summary of contract assets and liabilities

The following table presents changes in the Company’s contract assets as of June 30, 2019 (in thousands):

	Balance as of							Balance as of
	December 31, 2018		Additions		Deductions			June 30, 2019
Contract assets:
Contract asset - CAMBIA Canada	$	—	$	300	$	—		$	300
Contract asset - Collegium, net	2,416		375		(672		)	2,119
	$	2,416	$	675	$	(672	)	$	2,419