CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Operating Activities:
Net loss	$ (1,249)	$ (274)
Adjustments to reconcile net loss to net cash provided by (used) operating activities:
Depreciation and amortization	305	236
Stock-based compensation	206	375
Penalties and waived penalties on dividends	6	6
Changes in operating assets and liabilities:
Accounts receivable	157	79
Inventories	(33)	7
Prepaid expenses and other assets	48	(25)
Accounts payable and accrued expenses	(22)	(136)
Deferred revenue	(56)	303
Net cash provided by (used in) operating activities	(638)	571
Investing Activities:
Purchases of property and equipment	(121)	(55)
Financing Activities:
Proceeds from line of credit		453
Payments on line of credit		(453)
Payments of dividends		(558)
Principal payments on capital lease equipment	(211)	(168)
Proceeds from stock options exercised	66	77
Net cash used in financing activities	(145)	(649)
Net decrease in cash and cash equivalents	(904)	(133)
Cash and cash equivalents at beginning of year	1,006	1,139
Cash and cash equivalents at end of year	102	1,006
SUPPLEMENTAL CASH FLOW INFORMATION:
Interest paid on leased assets	24	23
SUPPLEMENTAL DISCLOSURE OF NON CASH FINANCING ACTIVITIES:
Preferred stock dividends accrued	160	141
Purchase of equipment through capital lease	$ 273	270
Conversion of preferred shares to common stock		$ 163