Consolidated Balance Sheets (USD $)	Dec. 31, 2012	Dec. 31, 2011
Current Assets:
Cash and cash equivalents of which $5,719,126 in 2012 and $5,215,349 in 2011 is interest bearing	$ 13,204,067	$ 10,114,163
Short term investments	15,433,967	15,023,999
Accounts receivable, net of allowances for doubtful accounts of $100,000 in 2012 and 2011 (including amounts from related party 2012 - $2,263,508 2011 - $1,760,304)	3,422,653	4,695,410
Inventories	2,626,606	3,635,730
Prepaid expenses and other current assets	1,284,279	667,927
Total current assets	35,971,572	34,137,229
PROPERTY AND EQUIPMENT
Machinery and equipment	1,901,185	2,945,324
Computer software	646,294	671,498
Office equipment and furniture and fixtures	1,579,698	738,405
Property and equipment, gross	4,127,177	4,355,227
Less-accumulated depreciation and amortization	(3,199,950)	(2,874,156)
Property and equipment, net	927,227	1,481,071
OTHER ASSETS	38,882	464,286
TOTAL ASSETS	36,937,681	36,082,586
CURRENT LIABILITIES:
Accounts payable (including amounts due to related party; 2012 - $69,017; 2011 - $503,763)	1,504,677	3,526,171
Accrued expenses	2,216,524	3,016,596
Deferred revenue	93,750	93,750
Total current liabilities	3,814,951	6,636,517
DEFERRED REVENUE	33,526	46,416
COMMON STOCK WARRANT LIABILITY	1,173,747	8,168,846
TOTAL LIABILITIES	5,022,224	14,851,779
Contingently redeemable series C preferred stock, 550 and 600 shares issued and outstanding in 2012 and 2011, respectively (liquidation preference of $550,000 and $600,000 in 2012 and 2011, respectively)	550,000	600,000
SHAREHOLDERS' EQUITY:
Preferred stock, $.01 par value; 1,000,000 shares authorized, Series B convertible preferred stock, 130 shares issued and outstanding (liquidation preference of $13,000)	1	1
Series E convertible preferred stock, 22,740 shares issued and outstanding (liquidation preference of $2,274,000)	227	227
Common stock $.01 par value; 150,000,000 shares authorized; 87,543,781 and 87,367,313 shares issued in 2012 and 2011, respectively	875,437	873,673
Capital in excess of par value	278,697,432	278,060,138
Less cost of 36,448 treasury shares	(125,381)	(125,381)
Accumulated deficit	(248,365,480)	(258,282,753)
Accumulated other comprehensive income	283,221	104,902
Shareholders' equity	31,365,457	20,630,807
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	$ 36,937,681	$ 36,082,586