ACCRUED LIABILITIES (Tables)

12 Months Ended

Dec. 31, 2018

Accounts Payable and Accrued Liabilities, Current [Abstract]

Schedule of accounts payable and accrued liabilities

Accrued liabilities consist of the following (in thousands):

	December 31,		December 31,
	2018		2017
Accrued compensation	$	5,475	$	7,345
Accrued royalties	2,773		17,370
Accrued restructuring and one-time termination costs	1,578		9,483
Other accrued liabilities	21,535		26,298
Total accrued liabilities	$	31,361	$	60,496