Business Acquisition - Additional Information (Detail) (USD $)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Jan. 09, 2013
Business Acquisition [Line Items]
Business acquisition, purchase price allocation, assets acquired			$ 240,000
Acquisition of intangible assets	75,000	0
Common stock issued	0	380,000
Contingent cash consideration	25,000
Estimated useful life	5 years
Business Acquisition
Business Acquisition [Line Items]
Issuance of common stock (in shares)	8,000
Common stock issued	$ 140,000