Other current liabilities (Tables)

12 Months Ended

Dec. 31, 2018

Other Current Assets and Liabilities and Other Noncurrent Liabilities [Abstract]

Other current liabilities

Other current liabilities as of December 31, 2018 and 2017 comprised the following (in thousands):

	December 31,
	2018		2017
Accrued royalties	$	534	$	605
Accrued warranties	330		469
Deferred revenue	245		448
Deferred rent	520		593
Other accrued liabilities	1,414		1,111
Total other current liabilities	$	3,043	$	3,226