STATEMENTS OF CASH FLOWS (Unaudited) (USD $)	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Operating activities:
Net loss	$ (935,774)	$ (1,152,556)
Adjustment to reconcile net loss to net cash (used in) provided by operating activities:
Depreciation and amortization	451,058	505,803
Gain on disposal of equipment	(17,100)
Stock compensation expense	148,975	159,998
Allowance for excess inventory quantities	47,017
Changes in assets and liabilities related to operations:
Trade accounts receivable	(567,377)	(327,655)
Other accounts receivable	25,165	4,590
Inventories	188,167	299,116
Prepaid expenses and other assets	(41,368)	(34,983)
Accounts payable	(171,318)	415,663
Accrued expenses	9,964	32,591
Deferred other revenue		135,999
Net cash (used in) provided by operating activities	(862,591)	38,566
Investing activities:
Proceeds from disposal of equipment	17,100
Acquisition of equipment and leasehold improvements	(58,582)	(44,950)
Payment of accounts payable incurred for the purchase of equipment and leasehold improvements	(20,404)	(14,941)
Net cash used in investing activities	(61,886)	(59,891)
Financing activities:
Principal payments on capital leases	(41,602)	(6,650)
Proceeds from exercise of stock options	3,000
Net cash used in financing activities	(38,602)	(6,650)
Decrease in cash and cash equivalents	(963,079)	(27,975)
Cash and cash equivalents at beginning of period	4,124,234	2,693,623
Cash and cash equivalents at end of period	3,161,155	2,665,648
Supplemental cash flow information:
Interest paid	9,125	3,037
Supplemental non-cash investing activities:
Accounts payable incurred for the purchase of equipment and leasehold improvements	41,879	5,646
Capital lease obligations incurred in the purchase of equipment		$ 120,359