Accrued Expenses and Other Current Liabilities (Tables)

6 Months Ended

Jun. 30, 2018

Payables and Accruals [Abstract]

Schedule of 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