Statements of Cash Flows (Unaudited) (USD $)	6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010
Cash flows from operating activities:
Net loss	$ (3,157,000)	$ (3,343,000)
Adjustments to reconcile net loss to net cash used in operating activities:
Reserve for doubtful accounts	53,000
Inventory reserve	204,000	103,000
Depreciation and amortization	253,000	273,000
Loss on asset disposal	49,000
Loss on litigation settlement	41,000
Issuance of common stock for employee services		48,000
Stock option expense	208,000	285,000
(Increase) decrease in:
Accounts receivable	42,000	(218,000)
Inventory and supplies	(254,000)	592,000
Prepaid expenses and other current assets	271,000	(173,000)
Long term accounts receivable	(45,000)	(215,000)
Increase (decrease) in:
Accounts payable	(1,435,000)	221,000
Deferred revenues	67,000	(259,000)
Accrued payroll and related expense	(329,000)	266,000
Other accrued liabilities	(1,013,000)	(299,000)
Accrued interest payable	40,000	41,000
Net cash used in operating activities	(5,005,000)	(2,678,000)
Cash flows from investing activities:
Purchases of property and equipment	(193,000)	(188,000)
Net cash used in investing activities	(193,000)	(188,000)
Cash flows from financing activities:
Payment on notes payable and capital lease obligations	(14,000)	(15,000)
Net proceeds from the exercise of stock options	23,000	6,000
Net cash provided by (used in) financing activities	9,000	(9,000)
Net (decrease) in cash and cash equivalents	(5,189,000)	(2,875,000)
Cash and cash equivalents, beginning of period	8,431,000	13,078,000
Cash and cash equivalents, end of period	3,242,000	10,203,000
Supplemental disclosure of cash flow information:
Interest paid	3,000	3,000
Assets acquired through financing arrangements	$ 25,000	$ 26,000