Business and Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2011

Business and Summary of Significant Accounting Policies [Abstract]

Estimated useful lives of property and equipment by major assets categories

Estimated useful lives of our property and equipment by major asset category are as follows:

Leasehold improvements	5 to 10 years
Office furniture and equipment	5 to 7 years
Production machinery, computer equipment and software	3 to 7 years
Property under capital lease	3 to 4 years

Activities in the accrued warranty liabilities account

The activity in the accrued warranty liabilities account was as follows (in thousands):

	2011			2010			2009
Balance at beginning of year	$	5,744		$	7,143		$	8,049
Additions charged to costs and expenses for current-year sales		4,232			3,630			5,114
Deductions from reserves		(4,750	)		(4,318	)		(5,822	)
Changes in liability for pre-existing warranties during the current year, including expirations(1)		1,084			(711	)		(198	)
Balance at end of period	$	6,310		$	5,744		$	7,143

(1) Incudes $1.6 million adjustment for customer-service reserves during 2011.

New Accounting Pronouncements and Changes in Accounting Principles

The change in accounting principle has been applied retrospectively by adjusting all previously reported amounts to conform to our new policy. A summary of the retrospective application is as follows for the periods presented in this Form 10-K (in thousands):

	Before Accounting Policy Change		Adjustment			As Reported
Consolidated balance sheet – December 31, 2011
Cash and cash equivalents	$	125,205	$	(8,950	)	$	116,255
Accounts receivable		4,894		8,950			13,844
	As Previously Reported		Adjustment			As Adjusted
Consolidated balance sheet – January 1, 2011
Cash and cash equivalents	$	81,361	$	(5,345	)	$	76,016
Accounts receivable		4,564		5,345			9,909

	Before Accounting Policy Change			Adjustment			As Reported
Consolidated statement of cash flow – Year ended December 31, 2011
Cash flows from operating activities:
Changes in operating assets and liabilities:
Accounts receivable	$	(330	)	$	(3,605	)	$	(3,935	)
Net cash provided by operating activities		94,651			(3,605	)		91,046
Net increase in cash and cash equivalents	$	43,844		$	(3,605	)	$	40,239
Cash and cash equivalents, at beginning of year		81,361			(5,345	)		76,016
Cash and cash equivalents, at end of year	$	125,205		$	(8,950	)	$	116,255

	As Previously Reported		Adjustment			As Adjusted
Consolidated statement of cash flow – Year ended January 1, 2011
Cash flows from operating activities:
Changes in operating assets and liabilities:
Accounts receivable	$	530	$	188		$	718
Net cash provided by operating activities		71,219		188			71,407
Net increase in cash and cash equivalents	$	63,644	$	188		$	63,832
Cash and cash equivalents, at beginning of year		17,717		(5,533	)		12,184
Cash and cash equivalents, at end of year	$	81,361	$	(5,345	)	$	76,016

	As Previously Reported			Adjustment			As Adjusted
Consolidated statement of cash flow – Year ended January 2, 2010
Cash flows from operating activities:
Changes in operating assets and liabilities:
Accounts receivable	$	(155	)	$	(3,463	)	$	(3,618	)
Net cash provided by operating activities		66,639			(3,463	)		63,176
Net increase in cash and cash equivalents	$	4,660		$	(3,463	)	$	1,197
Cash and cash equivalents, at beginning of year		13,057			(2,070	)		10,987
Cash and cash equivalents, at end of year	$	17,717		$	(5,533	)	$	12,184