Unaudited Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Operating Activities:
Net loss	$ (1,211)	$ (746)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Depreciation and amortization	218	231
Stock-based compensation	82	161
Penalties and waived penalties on dividends	13	3
Changes in operating assets and liabilities:
Accounts receivable	(8)	117
Inventories	(7)
Prepaid expenses and other assets	30	89
Accounts payable and accrued expenses	41	85
Deferred revenue	236	342
Net cash provided by (used in) operating activities	(606)	282
Investing Activities:
Purchases of property and equipment	(41)	(112)
Financing Activities:
Proceeds from line of credit	364
Payments on line of credit	(364)
Proceeds from stock options exercised	99	66
Borrowings on loans from officer	805
Principal payments on capital leases	(149)	(161)
Net cash provided by (used by) financing activities	755	(95)
Net increase in cash and cash equivalents	108	75
Cash and cash equivalents at beginning of period	102	1,006
Cash and cash equivalents at end of period	210	1,081
SUPPLEMENTAL DISCLOSURE OF NON CASH FINANCING ACTIVITIES:
Preferred stock dividends accrued	104	104
Purchase of leased equipment under capital lease	6	225
Conversion of preferred shares to common stock