ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)

12 Months Ended

Dec. 31, 2017

ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

Schedule of useful lives of property and equipment

Furniture and office equipment	3 - 5 years
Machinery and equipment	5 - 7 years
Laboratory equipment	3 - 5 years
Leasehold improvements	Shorter of estimated useful life or lease term

Schedule of total revenues

Total revenues are summarized in the following table:

(in thousands)	2017		2016		2015
Product sales:
NUCYNTA products	$	239,539	$	281,261	$	189,854
Gralise		77,034		88,446		81,054
CAMBIA		31,597		31,273		27,426
Lazanda		15,010		26,547		17,711
Zipsor		16,700		27,539		25,705
Total product sales		379,880		455,066		341,750
Royalties:
Total royalty revenue		844		831		985
Total revenues	$	380,724	$	455,897	$	342,735

Schedule of sales and accounts receivable customer concentration risk

	Product shipments			Product sales-related accounts receivable
	2017	2016	2015	2017	2016	2015
McKesson Corporation	36%	36%	36%	41%	39%	38%
AmerisourceBergin Corporation	27%	27%	24%	27%	33%	25%
Cardinal Health	26%	25%	27%	23%	20%	25%
All others	11%	12%	13%	9%	8%	12%
Total	100%	100%	100%	100%	100%	100%