Condensed Consolidated Balance Sheets (USD $)	Sep. 30, 2011	Dec. 31, 2010
Current Assets:
Cash and cash equivalents of which $5,218,499 in 2011 and $8,245,818 in 2010 is interest bearing	$ 11,327,465	$ 21,630,979
Short term investments	14,988,328	0
Accounts receivable, net of allowances for doubtful accounts of $100,000 in 2011 and 2010 (including amounts from related party: 2011 - $932,052; 2010 - $2,101,161)	3,099,756	4,141,026
Inventories	3,343,237	2,586,207
Prepaid expenses and other current assets	560,166	497,947
Total current assets	33,318,952	28,856,159
Property and equipment, net	851,343	518,542
Other assets	464,306	484,141
Total Assets	34,634,601	29,858,842
Liabilities and Shareholders' Equity (Deficiency)[Abstract]
Accounts payable	2,906,871	5,393,966
Accrued expenses	3,613,674	4,491,074
Deferred revenue (amounts from related party)	0	16,974,383
Total current liabilities	6,520,545	26,859,423
Deferred revenue	49,815	154,187
Redeemable warrants	0	13,471,832
Common stock warrant liability	5,935,171	9,286,906
TOTAL LIABILITIES	12,505,531	49,772,348
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, 24,000 shares issued and outstanding (liquidation preference of $2,400,000) in 2011 and 59,000 shares issued and outstanding (liquidation preference of $5,900,000) in 2010	240	590
Common stock $.01 par value; 150,000,000 authorized; 87,304,313 and 84,434,611 shares issued in 2011 and 2010, respectively	873,043	844,345
Capital in excess of par value	277,903,393	260,600,989
Less cost of 36,448 and 3,462,124 treasury shares in 2011 and 2010, respectively	(125,381)	(3,346,090)
Accumulated deficit	(257,265,396)	(278,809,945)
Accumulated other comprehensive income	143,170	196,604
Shareholders' equity (deficiency)	21,529,070	(20,513,506)
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY (DEFICIENCY)	$ 34,634,601	$ 29,858,842