Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Cash flows from operating activities:
Net loss	$ (2,934)	$ (6,231)
Adjustments to reconcile net loss to net cash provided (used) in operating activities:
Depreciation expense	367	613
Noncore inventory write-off		2,005
Write-off rental units		650
Net gain on lease termination		(2,195)
Provision for losses on accounts receivable	1,040	1,406
Amortization of intangible assets	57	47
Amortization of financing fees		48
Issuance of common stock for services		23
Provision for obsolete inventory	28	(580)
Deferred rent		391
Employee stock-based compensation expense	130	93
Changes in operating assets and liabilities:
Accounts receivable	(277)	2,436
Inventory	1,602	1,642
Prepaid expenses	223	96
Income tax receivable	268	625
Deposits and other current assets	(53)	122
Deferred revenue	(23)	112
Accounts payable	(67)	(199)
Accrued liabilities	(20)	(126)
Income taxes payable		(17)
Net cash provided by operating activities	341	961
Cash flows from investing activities:
Net disposals (purchases) of equipment	9	(272)
Change in inventory used for rental	99	285
Payments on contingent consideration	(4)	(3)
Net cash provided by investing activities	108	10
Cash flows from financing activities:
Net repayments on line of credit	(440)	(1,378)
Proceeds from notes payable and capital leases		207
Payments on notes payable and capital lease obligations	(64)	(60)
Net cash used in financing activities	(504)	(1,231)
Net decrease in cash	(55)	(260)
Cash at the beginning of the period	63	323
Cash at the end of the period	8	63
Supplemental cash flow information:
Interest paid	$ 503	536
Supplemental disclosure of non-cash investing and financing activities:
Deposit used to purchase leasehold improvements		$ 311