Condensed Consolidated Statements of Operations (Unaudited) (USD $) In Thousands, except Share data	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Net revenue:
Rental	$ 2,482	$ 2,032	$ 7,377	$ 6,639
Sales	6,945	4,625	17,078	10,635
Total net revenue	9,427	6,657	24,455	17,274
Cost of revenue:
Rental	465	169	1,191	702
Sales	1,470	1,257	3,915	2,942
Total cost of revenue	1,935	1,426	5,106	3,644
Gross profit	7,492	5,231	19,349	13,630
Selling, general and administrative expense	6,389	4,606	17,486	12,842
Income from operations	1,103	625	1,863	788
Other income (expense):
Interest income		2	1	5
Interest expense and loss on extinguishment of debt	(87)	(45)	(225)	(177)
Other income (expense)			2	(16)
Total other income (expense)	(87)	(43)	(222)	(188)
Income before income tax	1,016	582	1,641	600
Income tax expense	(425)	(214)	(676)	(270)
Net income	$ 591	$ 368	$ 965	$ 330
Net income per share:
Basic	$ 0.02	$ 0.01	$ 0.03	$ 0.01
Diluted	$ 0.02	$ 0.01	$ 0.03	$ 0.01
Weighted average number of common shares outstanding:
Basic	30,794,268	30,569,441	30,727,720	30,555,778
Diluted	31,013,012	30,667,064	30,977,933	30,744,764