Prepaid Expenses and Other Current Assets

6 Months Ended

Jun. 30, 2018

Prepaid Expense and Other Assets, Current [Abstract]

Prepaid Expenses and Other Current Assets

4. PREPAID EXPENSES AND OTHER CURRENT ASSETS

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

	June 30, 2018		December 31, 2017
	(in thousands)
Other prepaid expenses	$	1,678	$	920
Prepaid insurance		1,827		1,445
Prepaid leases		87		92
Supply inventory		306		434
Total Prepaid expenses and other	$	3,898	$	2,891