Accrued Expenses and Other Current Liabilities

6 Months Ended

Jun. 30, 2018

Payables and Accruals [Abstract]

Accrued Expenses and Other Current Liabilities

7. ACCRUED EXPENSES AND OTHER CURRENT LIABILITIES

Accrued expenses and other current liabilities as of June 30, 2018 and December 31, 2017 consisted of the following:

	June 30, 2018		December 31, 2017
	(in thousands)
Payroll, bonus and vacation expense	$	2,299	$	2,633
Non income taxes		3,548		2,738
Royalty expenses		2,222		2,410
Accrued interest		86		132
Health claims		680		871
Workers’ compensation & pneumoconiosis		1,750		1,750
Deferred revenues		985		-
Other		963		652
Total	$	12,533	$	11,186