The amount of the valuation account as of the balance sheet date which reduces the carrying amount of inventory to net realizable value; takes into consideration such factors as market value, excessive quantities based on expected sales, technological obsolescence, and shrinkage. May also provide for estimated product returns or price concessions pertaining to product cost.

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+ Details

INVENTORIES (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011
Inventory Disclosure [Abstract]
Finished goods	$ 3,187		$ 4,057
Raw materials and work in process	1,561		1,547
Demonstration inventory	252		104
Inventory, gross	5,000		5,708
Less allowance for obsolescence	(593)	(611)	(616)	(559)	(509)	(511)
Inventories, net	$ 4,407		$ 5,092