Balance Sheets (USD $)	Dec. 31, 2012	Dec. 31, 2011
Assets
Cash and cash equivalents	$ 7,777,718	$ 13,954,919
Accounts receivable, net of allowance of $640,183 and $667,529 in 2012 and 2011, respectively	11,551,651	11,104,038
Current portion of long-term receivables	18,838	59,679
Inventories	5,098,241	6,036,051
Prepaid expenses and other current assets	3,492,067	3,081,484
Total current assets	27,938,515	34,236,171
Property and equipment, net	2,141,923	3,323,856
Intangible assets, net	1,979,320	2,279,153
Long-term receivables	73,199	51,892
Other assets	32,987	40,760
Total assets	32,165,944	39,931,832
Liabilities and stockholders' deficit
Short-term debt and current maturities of long-term debt	12,264,490	21,173,321
Accounts payable	3,556,688	5,610,181
Accrued liabilities	5,361,810	5,703,166
Deferred revenue	9,502,939	8,220,306
Warrants and debt conversion features	2,968,348	125,415
Total current liabilities	33,654,275	40,832,389
Long-term debt, less current maturities	16,824,736	17,290,531
Long-term deferred revenue	477,159	634,713
Other liabilities		3,094
Stockholders' deficit:
Preferred stock, par value $0.001; 10,000,000 shares authorized, none outstanding at 2012 and 2011
Common stock, par value $0.001; 300,000,000 shares authorized, 8,018,615 and 5,543,157 shares issued at 2012 and 2011, respectively	8,019	5,543
Additional paid in capital	366,053,627	356,779,007
Treasury stock, 4,015 shares at 2012 and 2011	(205,999)	(205,999)
Accumulated deficit	(384,645,873)	(375,407,446)
Total stockholders' deficit	(18,790,226)	(18,828,895)
Total liabilities and stockholders' deficit	$ 32,165,944	$ 39,931,832