Accrued Liabilities (Tables)

6 Months Ended

Jun. 30, 2017

Accrued Liabilities

Components of accrued liabilities

The components of accrued liabilities are summarized below (in thousands):

	June 30,		December 31,
	2017		2016
Preferred stock dividends payable	$	2,901	$	2,901
Accrued compensation and related charges		1,955		2,610
Advance from customers		1,286		238
Current portion of royalty payments		575		575
Dividends payable by consolidated joint ventures		512		499
Accrued professional services		401		583
Accrued income taxes		264		203
Accrued product warranty		130		251
Other accrued liabilities		1,339		1,400
	$	9,363	$	9,260