Stock Split - Additional Information (Detail) (USD $)	6 Months Ended
	Jun. 30, 2013
Equity [Line Items]
Stock split Ratio	211,100
IPO [Member]
Equity [Line Items]
Common stock, Shares issued under initial public offering	8,050,000
Common stock per share value issued to underwriters	$ 11
Scenario, Adjustment [Member]
Equity [Line Items]
Adjustment to accumulated deficit	$ 211