Condensed Consolidated Balance Sheets (USD $)	Mar. 31, 2012	Dec. 31, 2011
Current Assets:
Cash and cash equivalents	$ 9,530,000	$ 6,165,000
Accounts receivable, net	181,000	61,000
Inventory, net	1,356,000	1,609,000
Prepaid expenses and other current assets	388,000	472,000
Total Current Assets	11,455,000	8,307,000
Property and equipment, net of accumulated depreciation of $19,442,000 and $19,748,000, respectively	4,697,000	2,871,000
Patents, licenses and purchased technology, net of accumulated amortization of $2,362,000 and $2,342,000, respectively	1,393,000	1,409,000
Other assets	361,000	362,000
Total Assets	17,906,000	12,949,000
Current Liabilities:
Accounts payable	1,599,000	534,000
Accrued expenses	713,000	612,000
Total Current Liabilities	2,312,000	1,146,000
Other long term liabilities	593,000	628,000
Total Liabilities	2,905,000	1,774,000
Commitments and contingencies-Notes 6 and 7
Stockholders' Equity:
Preferred stock, $.001 par value, 2,000,000 shares authorized, 564,642 shares issued and outstanding	1,000	1,000
Common stock, $.001 par value, 250,000,000 shares authorized, 40,268,376 and 33,362,281 shares issued and outstanding, respectively	40,000	33,000
Capital in excess of par value	268,964,000	262,157,000
Accumulated deficit	(254,004,000)	(251,016,000)
Total Stockholders' Equity	15,001,000	11,175,000
Total Liabilities and Stockholders' Equity	$ 17,906,000	$ 12,949,000