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Other Current Liabilities
12 Months Ended
Dec. 31, 2011
Other Liabilities Disclosure [Abstract]  
Other Current Liabilities
Other Current Liabilities
Other current liabilities consist of the following (in thousands):
 
 
At
 
December 31,
2011
 
January 1,
2011
Accrued warranty
$
4,797

 
$
3,129

Accrued professional services
1,497

 
722

Customer deposits
4,912

 
397

Fair value of deferred payments to Zygo Corporation related to acquisition
679

 
750

Legal settlement
2,500

 

Other
2,324

 
2,295

Total other current liabilities
$
16,709

 
$
7,293


A reconciliation of the changes to the Company’s warranty accrual for fiscal years 2011 and 2010 is as follows (in thousands):
 
 
Years Ended
 
December 31,
2011
 
January 1,
2011
Balance as of beginning of period
$
3,129

 
$
1,200

Accruals for warranties issued during the period
4,747

 
5,008

Aggregate changes in liabilities relating to existing warranties
4,194

 
(238
)
Settlements during the period
(7,273
)
 
(2,841
)
Balance as of end of period
$
4,797

 
$
3,129