Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Cash flows from operating activities:
Net loss	$ (6,734)	$ (2,786)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation expense	433	608
Warranty expense	(1)	(6)
Writeoff of noncore inventory	2,005
Write-off rental units	650
Change in the value of contingent consideration		(70)
Change in provision for losses on accounts receivable	(901)	442
Amortization of intangible assets	36	39
Impairment of intangible assets		100
Impairment of goodwill		39
Amortization of financing fees	48	38
Issuance of common stock for services	23
Change in obsolete inventory	336	293
Deferred rent	391	1,033
Employee stock-based compensation expense	74	98
Gain on asset disposal	33	(6)
Changes in operating assets and liabilities:
Accounts receivable	3,474	2,959
Inventory	186	(265)
Income tax receivable	674
Prepaid expenses	309	65
Deposits and other current assets	44	(2,057)
Accounts payable	2	232
Accrued liabilities	(135)	(1,048)
Deferred revenue	109
Income taxes payable	(17)	(384)
Net cash provided by (used in) operating activities	1,039	(676)
Cash flows from investing activities:
Sales (purchases) of equipment	216	(501)
Change in inventory used for rental	106	550
Payments on contingent consideration	(4)	(3)
Net cash provided by investing activities	318	46
Cash flows from financing activities:
Net (repayments) borrowings on line of credit	(1,279)	385
Payments on notes payable and capital lease obligations	(82)	(110)
Net cash (used in) provided by financing activities	(1,361)	275
Net decrease in cash	(4)	(355)
Cash at the beginning of the period	323	823
Cash at the end of the period	319	468
Supplemental cash flow information:
Interest paid	133	449
Income taxes paid (including interest and penalties)	2	384
Supplemental disclosure of non-cash investing and financing activities:
Equipment acquired through note payable and capital lease		137
Deposit used to purchase equipment	$ 388