Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Cash flows from operating activities:
Net loss	$ (7,003)	$ (2,037)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation expense	284	417
Writeoff of non-core inventory	2,005
Writeoff of rental units	650
Change in the value of contingent consideration		(70)
Provision for losses on accounts receivable	(827)	289
Amortization of intangible assets	25	30
Impairment of intangible assets		100
Impairment of goodwill		39
Amortization of financing fees	48	25
Change in obsolete inventory	14	192
Deferred rent	377	678
Employee stock-based compensation expense	55	69
Gain on asset disposal		(6)
Changes in operating assets and liabilities:
Accounts receivable	2,877	2,160
Inventory	400	123
Income tax receivable	522
Prepaid expenses	173	49
Deposits and other current assets		(1,601)
Accounts payable	258	51
Accrued liabilities	(418)	(909)
Deferred revenue	1,296
Income taxes payable	(5)	(539)
Net cash provided by (used in) operating activities	731	(940)
Cash flows from investing activities:
Sales (purchases) of equipment	142	(438)
Change in inventory used for rental	150	111
Payments on contingent consideration	(4)	(3)
Net cash provided by (used in) investing activities	288	(330)
Cash flows from financing activities:
Net (repayments) borrowings on line of credit	(944)	964
Payments on notes payable and capital lease obligations	(87)	(72)
Net cash (used in) provided by financing activities	(1,031)	892
Net decrease in cash	(12)	(378)
Cash at the beginning of the period	323	823
Cash at the end of the period	311	445
Supplemental cash flow information:
Interest paid	133	315
Income taxes paid (including interest and penalties)	2	539
Supplemental disclosure of non-cash investing and financing activities:
Equipment acquired through note payable and capital lease		$ 137