Other current assets (Tables)

6 Months Ended

Jun. 30, 2018

Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]

Schedule of other current assets

Other current assets consisted of the following (in thousands):

	June 30,		December 31,
	2018		2017
Prepaid expenses	$	1,551	$	3,085
Deposits and other receivables	1,071		1,600
Interest receivable	790		237
	$	3,412	$	4,922