Statements of Cash Flows (Unaudited) (USD $)	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
Operating activities:
Net loss	$ (1,152,556)	$ (1,083,307)
Adjustment to reconcile net loss to net cash provided by (used in) operating activities:
Depreciation and amortization	505,803	563,764
Stock compensation expense	159,998	201,130
Changes in assets and liabilities related to operations:
Trade accounts receivable	(327,655)	(774,091)
Other accounts receivables	4,590	(63,342)
Inventories	299,116	(92,315)
Prepaid expenses and other assets	(34,983)	(154,425)
Accounts payable	415,663	(240,242)
Accrued expenses	32,591	(530,654)
Deferred other revenue	135,999
Net cash provided by (used in) operating activities	38,566	(2,173,482)
Investing activities:
Acquisition of equipment and leasehold improvements	(44,950)	(52,141)
Payment of accounts payable incurred for the purchase of equipment and leasehold improvements	(14,941)	(52,444)
Net cash used in investing activities	(59,891)	(104,585)
Financing activities:
Principal payment on capital leases	(6,650)	(748)
Net cash used in financing activities	(6,650)	(748)
Decrease in cash and cash equivalents	(27,975)	(2,278,815)
Cash and cash equivalents at beginning of period	2,693,623	5,744,322
Cash and cash equivalents at end of period	2,665,648	3,465,507
Supplemental cash flow information:
Interest paid	3,037	1,798
Supplemental non-cash investing activities:
Accounts payable incurred for the purchase of equipment and leasehold improvements	5,646	19,144
Capital lease obligations incurred in the purchase of equipment	$ 120,359