7. Fixed assets (Detail) - Fixed assets (USD $)	Dec. 31, 2012	Dec. 31, 2011
Computer equipment	$ 22,667
Computer equipment	6,065
Computer equipment	16,602
Computer equipment	11,910
Computer software	27,701
Computer software	23,605
Computer software	4,096
Computer software	14,315
Furniture and equipment	416,518
Furniture and equipment	152,042
Furniture and equipment	264,476
Furniture and equipment	322,282
Medical equipment	368,802
Medical equipment	163,105
Medical equipment	205,697
Medical equipment	231,192
Vehicles	49,967
Vehicles	7,495
Vehicles	42,472
Leasehold improvements	142,047
Leasehold improvements	142,047
	$ 617,567	$ 641,052