Condensed Consolidated Balance Sheets - USD ($)	Dec. 31, 2019	Dec. 31, 2018
Current Assets:
Cash and cash equivalents	$ 713,000	$ 5,616,000
Accounts receivable, net	344,000	0
Inventory, net	263,000	173,000
Prepaid expenses and other current assets	76,000	61,000
Total Current Assets	1,396,000	5,850,000
Property and equipment, net of accumulated depreciation of $12,958,000 and $12,172,000, respectively	233,000	1,009,000
Patents, licenses and purchased technology, net of accumulated amortization of $1,071,000 and $1,026,000, respectively	641,000	686,000
Operating lease assets	152,000
Other assets	60,000	69,000
Total Assets	2,482,000	7,614,000
Current Liabilities:
Accounts payable	527,000	313,000
Accrued expenses	292,000	539,000
Current lease liabilities	148,000
Total Current Liabilities	967,000	852,000
Long term lease liabilities	4,000
Other long term liabilities	8,000	17,000
Total Liabilities	979,000	869,000
Commitments and contingencies (Notes 7 and 8)
Stockholders' Equity:
Preferred stock, $.001 par value, 2,000,000 shares authorized, 328,925 and 330,787 issued and outstanding, respectively
Common stock, $.001 par value, 250,000,000 shares authorized, 17,731,893 and 3,270,609 shares issued and outstanding, respectively	18,000	3,000
Capital in excess of par value	330,458,000	326,486,000
Accumulated deficit	(328,973,000)	(319,744,000)
Total Stockholders' Equity	1,503,000	6,745,000
Total Liabilities and Stockholders' Equity	$ 2,482,000	$ 7,614,000