Balance Sheet (Details 1) (USD $) In Thousands, unless otherwise specified	Jul. 31, 2012	Jan. 31, 2012
Inventories:
Raw materials	$ 3,025	$ 2,789
Finished goods	3,749	3,711
Work in progress	1,224	1,109
Total inventories, gross	7,998	7,609
Less allowance for obsolescence	(1,021)	(901)
Total inventories, net	$ 6,977	$ 6,708

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