Prepaid Expenses and Other Current Assets (Tables)

12 Months Ended

Dec. 31, 2016

Prepaid Expenses And Other Assets [Abstract]

Prepaid Expenses And Other Current Assets

	December 31, 2016	December 31, 2015
Prepaid voyage costs	$                    27	$      137
Inventory	220	1,160
Other	1,353	—
Total prepaid expenses and other current assets	$          1,600	$      1,297