XML 31 R22.htm IDEA: XBRL DOCUMENT

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)

3 Months Ended

Mar. 31, 2013

Allowance for doubtful accounts rollforward

The following is a summary of activity for the allowance for doubtful accounts during the three months ended March 31, 2013 and 2012:



	Dollars in Thousands
	Beginning Balance		Provision		Write Offs			Ending Balance
Three Months Ended March 31, 2013	$	2,171	$	1,581	$	(1,203	)	$	2,549
Three Months Ended March 31, 2012	$	1,088	$	474	$	(483	)	$	1,079

Allowance for obsolete inventory rollforward

The following is a summary of activity for the allowance for obsolete inventory during the three months ended March 31, 2013 and 2012:



	Dollars in Thousands
	Beginning Balance		Provision		Write Offs			Ending Balance
Three Months Ended March 31, 2013	$	616	$	—	$	(5	)	$	611
Three Months Ended March 31, 2012	$	511	$	1	$	(3	)	$	509

Schedule of property and equipment, useful lives

Depreciation is computed by the straight-line method over the estimated useful lives of the related assets as follows:



Leasehold improvements	1 to 10 years
Furniture and fixtures	3 to 7 years
Production equipment	3 to 7 years
Computer equipment	3 to 7 years
Research and development equipment	2 to 7 years

- Definition

Tabular disclosure of the useful life and salvage value of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale. Examples include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software.

+ References+ Details