Condensed Consolidated Statements of Operations and Comprehensive Income (Unaudited) (USD $) In Thousands, except Per Share data	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Revenue
Equipment and product sales	$ 19,750	$ 16,363	$ 39,981	$ 27,994
Services (note 10(c))	26,993	28,792	45,267	69,023
Rentals (note 10(c))	9,015	9,352	14,066	29,203
Finance income	1,474	1,091	2,828	2,161
Other			250
Revenues	57,232	55,598	102,392	128,381
Costs and expenses applicable to revenues
Equipment and product sales (note 10(a))	9,661	8,019	20,512	16,153
Services (note 10(a) and 10(c))	17,525	18,210	28,902	32,177
Rentals (note 10(a))	3,744	2,329	6,010	4,712
Other			20
Cost of goods and services sold	30,930	28,558	55,444	53,042
Gross margin	26,302	27,040	46,948	75,339
Selling, general and administrative expenses (note 10(b)) (including share-based compensation expense of $4.6 million and $8.5 million for the three and six months ended June 30, 2011, respectively (2010 - recovery of $3.8 million and expense of $5.6 million, respectively))	19,470	11,133	36,338	30,662
Provision for arbitration award (note 9(c))			2,055
Research and development	2,117	1,219	3,985	2,462
Amortization of intangible	116	115	228	245
Receivable provisions, net of recoveries (note 12)	151	353	359	366
Income from operations	4,448	14,220	3,983	41,604
Interest income	13	13	31	297
Interest expense	(551)	(535)	(994)	(1,187)
Income from operations before income taxes	3,910	13,698	3,020	40,714
Provision for income taxes	(1,634)	(396)	(1,325)	(831)
Loss from equity-accounted investments	(451)		(873)
Net income	$ 1,825	$ 13,302	$ 822	$ 39,883
Net income per share - basic and diluted: (note 14(c))
Net income per share - basic	$ 0.03	$ 0.21	$ 0.01	$ 0.63
Net income per share - diluted	$ 0.03	$ 0.20	$ 0.01	$ 0.60