Statements Of Cash Flows (USD $)	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Operating activities:
Net loss	$ (774,122)	$ (553,742)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	253,712	281,924
Stock compensation expense	82,407	109,108
Changes in assets and liabilities related to operations:
Trade accounts receivable	(299,029)	(942,968)
Other accounts receivable	(317,298)
Inventories	67,205	83,192
Prepaid expenses and other assets	47,397	(260,644)
Accounts payable	378,708	(174,705)
Accrued expenses	(76,063)	(142,882)
Deferred other revenue	279,000
Net cash used in operating activities	(358,083)	(1,600,717)
Investing activities:
Acquisition of equipment and leasehold improvements, net	(4,434)	(65,934)
Payment of accounts payable incurred for the purchase of equipment and leasehold improvements	(14,941)	(52,444)
Net cash used in investing activities	(19,375)	(118,378)
Financing activities:
Principal payment on capital lease	(859)	(748)
Net cash used in financing activities	(859)	(748)
Decrease in cash and cash equivalents	(378,317)	(1,719,843)
Cash and cash equivalents at beginning of period	2,693,623	5,744,322
Cash and cash equivalents at end of period	2,315,306	4,024,479
Supplemental cash flow information:
Interest paid	1,105	899
Supplemental non-cash investing and financing activities:
Accounts payable incurred for the purchase of equipment and leasehold improvements		6,500
Capital lease obligations incurred in the purchase of equipment	$ 32,360