ACCRUED LIABILITIES (Tables)

3 Months Ended

Mar. 31, 2019

Accounts Payable and Accrued Liabilities, Current [Abstract]

Schedule of accounts payable and accrued liabilities

Accrued liabilities consist of the following (in thousands):

	March 31, 2019		December 31, 2018
Accrued compensation	$	2,916	$	5,475
Accrued royalties	2,192		2,773
Accrued restructuring and one-time termination costs	820		1,578
Other accrued liabilities	14,048		21,535
Total accrued liabilities	$	19,976	$	31,361