Condensed Consolidated Balance Sheets (USD $)	Jun. 30, 2012	Dec. 31, 2011
Current Assets:
Cash and cash equivalents of which $1,713,371 in 2012 and $5,215,349 in 2011 is interest bearing	$ 7,716,818	$ 10,114,163
Short term investments	15,241,961	15,023,999
Accounts receivable, net of allowances for doubtful accounts of $100,000 in 2012 and 2011 (including amounts from related party: 2012 - $1,862,967; 2011 - $1,760,304),	4,483,910	4,695,410
Inventories	4,438,658	3,635,730
Prepaid expenses and other current assets	990,016	667,927
Total current assets	32,871,363	34,137,229
Property and equipment, net	2,205,822	1,481,071
Other assets	38,875	464,286
TOTAL ASSETS	35,116,060	36,082,586
LIABILITIES AND SHAREHOLDERS'S EQUITY:
Accounts payable (including amounts due to related party; 2012 - $43,504; 2011 - $503,763)	2,182,460	3,526,171
Accrued expenses	2,465,245	3,016,596
Deferred revenue	31,250	93,750
Total current liabilities	4,678,955	6,636,517
Deferred revenue	39,889	46,416
Common stock warrant liability	1,703,779	8,168,846
TOTAL LIABILITIES	6,422,623	14,851,779
COMMITMENTS AND CONTINGENCIES
Contingently redeemable series C preferred stock, 600 shares issued and outstanding (liquidation preference of $600,000)	600,000	600,000
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) in 2012 and 2011	227	227
Common stock $.01 par value; 150,000,000 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	278,531,355	278,060,138
Less cost of 36,448 treasury shares	(125,381)	(125,381)
Accumulated deficit	(251,385,550)	(258,282,753)
Accumulated other comprehensive income	197,348	104,902
Shareholders' equity	28,093,437	20,630,807
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	$ 35,116,060	$ 36,082,586