Accrued Liabilities (Tables)

9 Months Ended

Sep. 30, 2018

Payables and Accruals [Abstract]

Schedule of accrued liabilities

Accrued liabilities consisted of the following for the periods indicated (in thousands):

	September 30, 2018		December 31, 2017
Accrued payroll	$	11,649	$	11,693
Accrued rent		1,198		1,180
Accrued employee benefits		2,236		2,035
Accrued state and local taxes		792		951
Advance payments		320		441
Accrued product warranty		1,218		1,118
Accrued commission expenses		209		425
Accrued professional fees		443		181
Accrued capital expenditures		1,131		—
Accrued other		1,527		1,079
Total accrued liabilities	$	20,723	$	19,103