Balance Sheets (USD $)	Sep. 30, 2014	Dec. 31, 2013
Current assets:
Cash and cash equivalents	$ 8,724,395	$ 13,775,130
Accounts receivable, net of allowance of $599,400 and $383,077 in 2014 and 2013, respectively	7,027,781	7,558,152
Inventories	6,586,303	4,879,039
Prepaid expenses and other current assets	1,435,121	1,945,206
Total current assets	23,773,600	28,157,527
Property and equipment, net	897,321	1,184,589
Intangible assets, net	1,454,611	1,679,486
Long-term receivables		20,431
Other assets	31,580	34,363
Total assets	26,157,112	31,076,396
Current liabilities:
Current maturities of long-term debt		49,733
Accounts payable	2,505,155	3,512,339
Accrued liabilities	6,526,610	7,079,381
Deferred revenue	8,015,860	7,519,754
Warrants	3,504,908	5,644,626
Total current liabilities	20,552,533	23,805,833
Long-term debt, less current maturities	18,435,843	18,481,478
Long-term deferred revenue	974,095	491,080
Stockholders' deficit:
Preferred stock, par value $0.001; 10,000,000 shares authorized, none outstanding at 2014 and 2013
Common stock, par value $0.001; 300,000,000 shares authorized, 20,465,997 and 19,311,390 shares issued at 2014 and 2013, respectively	20,466	19,311
Additional paid in capital	445,842,292	441,888,155
Treasury stock, 4,015 shares at 2014 and 2013	(205,999)	(205,999)
Accumulated deficit	(459,462,118)	(453,403,462)
Total stockholders' deficit	(13,805,359)	(11,701,995)
Total liabilities and stockholders' deficit	$ 26,157,112	$ 31,076,396