Accounts Payable and Accrued Liabilities (Tables)

12 Months Ended

Dec. 31, 2017

Payables and Accruals [Abstract]

Schedule of accounts payable and accrued liabilities

Accrued liabilities consist of the following (in thousands):

	December 31,
	2018		2017
Salary and payroll tax accrual	$	13,393	$	9,449
Taxes payable	3,437		2,655
License fee obligation	1,000		1,000
Placement fees payable	2,490		4,000
Accrued other	6,339		7,850
Total accrued liabilities	$	26,659	$	24,954