Commitments (Tables)

12 Months Ended

Dec. 31, 2012

Commitments [Abstract]

Future Minimum Payments Under Capital Leases

      The following is a schedule by years of future minimum payments under capital leases together with the present value of the net minimum lease payments as of December 31, 2012 (in thousands):

	Property			Equipment			Total
2013	$	2,064			34			2,098
2014		2,064			33			2,097
2015		2,063			30			2,093
2016		516			1			517
2017		----			1			1
Total minimum obligations		6,707			99			6,806
Less amounts representing interest (ranging from 4.4% to 17.4%)		(1,760	)		(2	)		(1,762	)
Net present value of minimum obligations		4,947			97			5,044
Less current portion		(1,208	)		(33	)		(1,241	)
Long-term capital lease obligations at December 31, 2012	$	3,739		$	64		$	3,803

Future Minimum Lease Payments for All Noncancelable Operating Leases

 Future minimum lease payments for all noncancelable operating leases at December 31, 2012 are as follows (in thousands):

2013	$	679
2014		512
2015		523
2016		382
2017		267
Remainder		1,806
Total minimum lease payments	$	4,169

Accrued Warranties

      We provide product warranties for products sold through certain U.S. Government contract vehicles.  We accrue a warranty liability at the time that we recognize revenue for the estimated costs that may be incurred in connection with providing warranty coverage. Warranties are valued using historical warranty usage trends; however, if actual product failure rates or service delivery costs differ from estimates, revisions to the estimated warranty liability may be required.  Accrued warranties are reported as other current liabilities on the consolidated balance sheets.

	Balance Beginning of Year		Accruals			Warranty Expenses			Balance End  of Year
	(amount in thousands)
Year Ended December 31, 2012	$	953	$	(393	)	$	(334	)	$	226
Year Ended December 31, 2011	$	1,079	$	257		$	(383	)	$	953
Year Ended December 31, 2010	$	1,708	$	(341	)	$	(288	)	$	1,079