Condensed Consolidated Balance Sheets (Parenthetical) (USD $)	Oct. 01, 2011	Dec. 31, 2010
ASSETS
Accumulated depreciation on property and equipment	$ 22,363,000	$ 21,948,000
Accumulated amortization on Patents, licenses and purchased technology	$ 2,315,000	$ 2,494,000
Stockholders' Equity:
Preferred stock, par value	$ 0.001	$ 0.001
Preferred stock, shares authorized	2,000,000	2,000,000
Preferred stock, shares issued	564,642	564,642
Preferred stock, shares outstanding	564,642	564,642
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares authorized	250,000,000	250,000,000
Common stock, shares issued	33,494,457	27,217,408
Common stock, shares outstanding	33,494,457	27,217,408