Unaudited Condensed Consolidated Statements of Cash Flows - USD ($)	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Operating Activities:
Net income	$ 2,706,000	$ 820,000
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	86,000	65,000
Stock-based compensation	14,000	11,000
Penalties on dividends	6,000	22,000
Changes in operating assets and liabilities:
Accounts receivable	(738,000)	(106,000)
Inventories		15,000
Prepaid expenses and other assets	(234,000)	(329,000)
Operating lease, right-of-use asset	304,000
Accounts payable and accrued expenses	(66,000)	201,000
Deferred revenue	179,000	541,000
Net cash provided by operating activities	2,257,000	1,240,000
Investing Activities:
Purchases of property and equipment	(168,000)	(75,000)
Financing Activities:
Borrowings on loan from officer		150,000
Payments on loan from officer	(1,815,000)	(1,200,000)
Proceeds from stock options exercised	226,000	71,000
Payments of dividends	(644,000)
Reduction of finance lease liability	(31,000)	(34,000)
Net cash used in financing activities	(2,264,000)	(1,013,000)
Net increase (decrease) in cash and cash equivalents	(175,000)	152,000
Cash and cash equivalents at beginning of period	1,652,000	224,000
Cash and cash equivalents at end of period	1,477,000	376,000
SUPPLEMENTAL DISCLOSURE OF NON CASH OPERATING AND FINANCING ACTIVITIES:
Preferred stock dividends accrued	68,000	69,000
Purchase of leased equipment per right-of-use finance lease		89,000
Initial recognition of operating lease, right-of-use asset	$ 1,771,000