Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands	6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010
Cash flows from operating activities:
Net income (loss)	$ 374	$ (37)
Adjustments to reconcile net income (loss) to net cash used in operating activities:
Depreciation expense	389	401
Provision for losses on uncollectible accounts receivable	630	102
Amortization of financing fees	23	21
Issuance of common stock for services	44	48
Provision for obsolete inventory		(9)
Deferred rent	(111)	564
Net loss on disposal of equipment		18
Employee stock-based compensation expense	146	126
Deferred tax benefit	(81)	(355)
Changes in operating assets and liabilities:
Accounts receivable	(2,834)	(1,257)
Inventory	(93)	(868)
Prepaid expenses	9	107
Other current assets	(49)	(19)
Accounts payable	145	(25)
Accrued liabilities	609	177
Income taxes payable	(192)	(545)
Net cash used in operating activities	(991)	(1,551)
Cash flows from investing activities:
Proceeds received in lease termination		108
Purchases of equipment and inventory used for rental	(739)	(224)
Net cash used in investing activities	(739)	(116)
Cash flows from financing activities:
Net borrowings from line of credit	1,934	1,087
Issuance of common stock	48
Deferred financing fees	(25)	(90)
Payments on capital lease obligations	(46)	(146)
Net cash provided by financing activities	1,911	851
Net increase (decrease) in cash	181	(816)
Cash at beginning of period	602	863
Cash at end of period	783	47
Supplemental cash flow information:
Interest paid	102	51
Income taxes paid	525	955
Supplemental disclosure of non-cash investing and financing activities:
Equipment acquired through capital lease		$ 334