Balance Sheets (USD $)	Jun. 30, 2012	Dec. 31, 2011
Assets
Cash and cash equivalents	$ 12,119,450	$ 13,954,919
Accounts receivable, net of allowance of $713,142 and $667,529 in 2012 and 2011, respectively	8,235,138	11,104,038
Current portion of long-term receivables	60,692	59,679
Inventories	7,378,595	6,036,051
Prepaid expenses and other current assets	3,858,824	3,081,484
Total current assets	31,652,699	34,236,171
Property and equipment, net	2,763,723	3,323,856
Intangible assets, net	2,129,236	2,279,153
Long-term receivables	31,581	51,892
Other assets	38,616	40,760
Total assets	36,615,855	39,931,832
Liabilities and stockholders' deficit
Short-term debt and current maturities of long-term debt	13,891,182	21,173,321
Accounts payable	4,635,569	5,610,181
Accrued liabilities	5,947,702	5,703,166
Deferred revenue	7,535,373	8,220,306
Warrants and debt conversion features	2,079,104	125,415
Total current liabilities	34,088,930	40,832,389
Long-term debt, less current maturities	15,237,558	17,290,531
Long-term deferred revenue	766,860	634,713
Other liabilities	787	3,094
Stockholders' deficit:
Common stock, par value $0.001; 100,000,000 shares authorized at 2012 and 2011, 7,812,206 and 5,431,157 shares issued at 2012 and 2011, respectively	7,812	5,543
Additional paid in capital	365,133,838	356,779,007
Treasury stock, 4,015 shares at 2012 and 2011	(205,999)	(205,999)
Accumulated deficit	(378,413,931)	(375,407,446)
Total stockholders' deficit	(13,478,280)	(18,828,895)
Total liabilities and stockholders' deficit	$ 36,615,855	$ 39,931,832