Unaudited Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Operating Activities:
Net income (loss)	$ 820	$ (789)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	65	109
Stock-based compensation	11	10
Penalties and waived penalties on dividends	22	15
Changes in operating assets and liabilities:
Accounts receivable	(106)	256
Prepaid expenses and other assets	(329)	(14)
Inventories	15
Accounts payable and accrued expenses	201	135
Deferred revenue	541	543
Net cash provided by operating activities	1,240	265
Investing Activities:
Purchases of property and equipment	(75)	(9)
Financing Activities:
Proceeds from stock options exercised	71	11
Proceeds from loan from officer	150	1,330
Principal payments on loan from officer	(1,200)	(1,190)
Principal payments on capital leases	(34)	(74)
Net cash (used in) provided by financing activities	(1,013)	77
Net increase in cash and cash equivalents	152	333
Cash and cash equivalents at beginning of period	224	64
Cash and cash equivalents at end of period	376	397
SUPPLEMENTAL DISCLOSURE OF NON CASH FINANCING ACTIVITIES:
Preferred stock dividends accrued	69	69
Purchase of leased equipment per capital lease	$ 89