Product Warranties

3 Months Ended

Mar. 31, 2012

Product Warranties Disclosures [Abstract]

Product Warranties

Product Warranties

The Company provides for the estimated costs of hardware warranties at the time the related revenue is recognized. Costs are estimated based on historical and projected product failure rates, historical and projected repair costs, and knowledge of specific product failures (if any). The specific hardware warranty includes parts and labor over a period generally ranging from one to three years. The Company provides no warranty for software. The Company regularly re-evaluates its estimates to assess the adequacy of the recorded warranty liabilities and adjust the amounts as necessary.

A reconciliation of the changes in the Company's warranty reserve are as follows:

	Three Months Ended March 31,
(in thousands)	2012			2011
Balance at the beginning of the period	$	983		$	605
Warranty expenses accrued	511			271
Warranty settlements made	(265		)	(285		)
Balance at the end of the period	$	1,229		$	591