Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Operating Activities:
Net loss	$ (221,000)	$ (1,211,000)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Depreciation and amortization	159,000	218,000
Stock-based compensation	16,000	82,000
Penalties and waived penalties on dividends	24,000	13,000
Gain on sale of investment	(56,000)
Changes in operating assets and liabilities:
Accounts receivable	(134,000)	(8,000)
Inventories	15,000	(7,000)
Prepaid expenses and other assets	40,000	30,000
Accounts payable and accrued expenses	168,000	41,000
Deferred revenue	263,000	236,000
Net cash provided by (used in) operating activities	274,000	(606,000)
Investing Activities:
Purchases of property and equipment	(13,000)	(41,000)
Proceeds from sale of investment	56,000
Net cash provided by (used by) investing activities	43,000	(41,000)
Financing Activities:
Proceeds from line of credit		364,000
Payments on line of credit		(364,000)
Proceeds from stock options exercised	11,000	99,000
Borrowings on loans from officer	1,580,000	805,000
Payments on loans from officer	(1,600,000)
Principal payments on capital leases	(109,000)	(149,000)
Net cash provided by (used by) financing activities	(118,000)	755,000
Net increase in cash and cash equivalents	199,000	108,000
Cash and cash equivalents at beginning of period	64,000	102,000
Cash and cash equivalents at end of period	263,000	210,000
SUPPLEMENTAL DISCLOSURE OF NON CASH FINANCING ACTIVITIES:
Preferred stock dividends accrued	104,000	104,000
Purchase of leased equipment under capital lease		$ 6,000