Inventories

6 Months Ended

Jun. 30, 2012

Inventories [Abstract]

Inventories

4. Inventories

(dollars in thousands)	June 30, 2012			December 31, 2011
Raw materials and subassemblies	$	3,017		$	3,017
Finished goods		1,176			1,147
Parts for resale		704			580
Obsolescence allowance		(407	)		(400	)
	$	4,490		$	4,344

Amounts (debited) credited to the allowance for obsolete inventory and charged to cost of sales amounted to $26,000 and $71,000 for the three month periods ended June 30, 2012 and 2011, respectively, and $82,000 and $149,000 for the six months period ended June 30, 2012 and 2011, respectively.