Accrued Liabilities

3 Months Ended

Mar. 31, 2018

Payables and Accruals [Abstract]

Accrued Liabilities

Accrued Liabilities:

Accrued liabilities consist of the following (in thousands):

	March 31, 2018		December 31, 2017
Accrued payroll and related costs	$	980	$	1,088
Warranty reserve	209		142
Restructuring charges	185		185
Payable to joint venture partner (see Note 13 - Joint Venture)	438		—
Other accrued liabilities	444		463
	$	2,256	$	1,878