Condensed Consolidated Balance Sheets (USD $)	Jun. 30, 2011	Dec. 31, 2010
Current Assets:
Cash and cash equivalents of which $13,256,241 in 2011 and $8,245,818 in 2010 is interest bearing	$ 21,760,780	$ 21,630,979
Accounts receivable, net of allowances for doubtful accounts of $100,000 in 2011 and 2010 (including amounts from related parties: 2011 - $6,540,972; 2010 - $0)	9,075,401	4,141,026
Inventories	2,781,820	2,586,207
Prepaid expenses and other current assets	685,028	497,947
Total current assets	34,303,029	28,856,159
Property and equipment, net	879,782	518,542
Other assets	464,424	484,141
Total Assets	35,647,235	29,858,842
Current Liabilities: [Abstract]
Accounts payable	3,300,302	5,393,966
Accrued expenses	3,643,850	4,491,074
Deferred revenue (amounts from related parties)	0	16,974,383
Total current liabilities	6,944,152	26,859,423
Deferred revenue	84,673	154,187
Redeemable warrants	0	13,471,832
Common stock warrant liability	10,985,691	9,286,906
TOTAL LIABILITIES	18,014,516	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	277,765,619	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	(261,682,637)	(278,809,945)
Accumulated other comprehensive income	201,834	196,604
Shareholders' equity (deficiency)	17,032,719	(20,513,506)
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY (DEFICIENCY)	$ 35,647,235	$ 29,858,842