ACCRUED LIABILITIES (Tables)

9 Months Ended

Sep. 30, 2019

Accounts Payable and Accrued Liabilities, Current [Abstract]

Schedule of accrued liabilities

Accrued liabilities consist of the following (in thousands): 

	September 30, 2019		December 31, 2018
Accrued compensation	$	5,677	$	5,475
Accrued royalties	5,799		2,773
Accrued restructuring and one-time termination costs	435		1,578
Accrued taxes payable	9,139		—
Other accrued liabilities	12,220		21,535
Total accrued liabilities	$	33,270	$	31,361