REVENUE (Tables)
 12 Months Ended
Dec. 31, 2021
Revenue from Contract with Customer [Abstract]  
Schedule of disaggregated revenue from contracts with customers
The following table reflects summary revenue, net for the years ended December 31, 2021 and 2020 (in thousands):
 
 Year ended December 31,
 20212020
Product sales, net:  
INDOCIN products (1)
$60,557 $31,684 
CAMBIA24,97228,350
Zipsor10,185 13,286 
SPRIX (1)
8,67611,077 
Other products5,030 7,693 
Total product sales, net109,420 92,090 
Commercialization agreement revenue, net— 11,258 
Royalties and milestone revenue2,579 1,519 
Other revenue(985)1,408 
Total revenues$111,014 $106,275 
(1)Products acquired in connection with the May 20, 2020 Zyla Merger