Condensed Consolidated Balance Sheets (Unaudited) (USD $)	Sep. 30, 2011	Dec. 31, 2010
CURRENT ASSETS
Cash and cash equivalents	$ 23,301,191	$ 8,884,402
Marketable securities	1,116,215	10,762,559
Accounts receivable, net of allowance for doubtful accounts of $50,000 and $60,000 in 2011 and 2010, respectively	2,231,374	3,311,467
Inventory	2,967,131	2,165,220
Prepaid and other current assets	754,289	1,344,062
TOTAL CURRENT ASSETS	30,370,200	26,467,710
Restricted cash	175,587	174,753
Property, plant and equipment, net	1,521,601	1,582,777
Deferred charges and other assets	61,902	68,099
TOTAL ASSETS	32,129,290	28,293,339
CURRENT LIABILITIES
Accounts payable	1,017,419	162,742
Accrued compensation	960,489	2,243,997
Other accrued expenses	2,723,889	2,348,838
Deferred revenue	0	712,338
TOTAL CURRENT LIABILITIES	4,701,797	5,467,915
Deferred revenue	908,578	1,917,237
Warrant liability	1,698,769	1,203,553
Other liabilities	161,822	181,153
TOTAL LIABILITIES	7,470,966	8,769,858
COMMITMENTS AND CONTINGENCIES (NOTE 13)
SHAREHOLDERS' EQUITY
Capital Stock Authorized: 100,000,000 shares; 40,000,000 shares designated as common stock, no par, and 60,000,000 shares issuable in series or classes; and 40,000 junior Series A preferred shares. Issued and outstanding: 24,649,364 and 24,239,365 shares of common stock, no par, at September 30, 2011 and December 31, 2010, respectively	151,985,400	151,703,468
Additional paid-in capital	10,283,724	9,399,434
Accumulated deficit	(137,644,010)	(141,656,600)
Accumulated other comprehensive income	33,210	77,179
TOTAL SHAREHOLDERS' EQUITY	24,658,324	19,523,481
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	$ 32,129,290	$ 28,293,339