Accrued Liabilities (Tables)

6 Months Ended

Jun. 30, 2018

Accrued Liabilities

Components of accrued liabilities

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

	June 30,		December 31,
	2018		2017
Preferred stock dividends payable	$	2,901	$	2,901
Accrued compensation and related charges		2,580		3,205
Payable in connection with purchase of subsidiary shares from noncontrolling interests		1,192		—
Advances from customers		927		924
Dividends payable by consolidated joint ventures		524		533
Accrued professional services		409		570
Accrued income taxes		341		270
Current portion of royalty payments		288		575
Other personnel related costs		221		230
Accrued product warranty		178		133
Other tax payable		85		395
Accrual for sales refund liabilities		82		—
Other accrued liabilities		2,065		1,413
	$	11,793	$	11,149