SCHEDULE II-VALUATION AND QUALIFYING ACCOUNTS (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Allowance for Doubtful Accounts and Cash Discounts
Changes in valuation and qualifying accounts reported as assets and liabilities of continuing and discontinued operations
Balance at Beginning of Period			$ (114,000)
Charged to Operations	53,000		(285,000)
Charges Utilized	4,000		399,000
Balance at End of Period	57,000
Inventory Reserve
Changes in valuation and qualifying accounts reported as assets and liabilities of continuing and discontinued operations
Balance at Beginning of Period			1,574,000
Charged to Operations			(353,000)
Charges Utilized			(1,221,000)
Inventory component parts fully reserved used in production			98,000
Inventory raw materials fully reserved used in production			367,000
Accrued Product Returns
Changes in valuation and qualifying accounts reported as assets and liabilities of continuing and discontinued operations
Balance at Beginning of Period	1,623,000	2,598,000	3,026,000
Charged to Operations	(45,000)	(317,000)	906,000
Charges Utilized	(880,000)	(658,000)	(1,334,000)
Balance at End of Period	698,000	1,623,000	2,598,000
Accrued Chargebacks Reserve
Changes in valuation and qualifying accounts reported as assets and liabilities of continuing and discontinued operations
Balance at Beginning of Period		472,000	1,617,000
Charged to Operations	131,000	(278,000)	3,103,000
Charges Utilized	(131,000)	(194,000)	(4,248,000)
Balance at End of Period			$ 472,000