Joint Venture Agreement - Additional Information (Detail) (USD $)	12 Months Ended	0 Months Ended	3 Months Ended	12 Months Ended
	Dec. 31, 2011	Nov. 02, 2010 Route Cloud [Member]	Jun. 30, 2011 Route Cloud [Member]	Dec. 31, 2010 Route Cloud [Member]
Joint Agreement [Line Items]
Amount of funding provided during period under joint venture agreement				$ 1,200,000
Reimburse sum as per new agreement for certain transition expenses		75,000
Impairment charge	$ 1,354,000		$ 1,400,000