Organization and Basis of Presentation - Additional Information (Detail) (USD $)	1 Months Ended			1 Months Ended
	May 31, 2014	Feb. 28, 2014 Contran Director	Sep. 30, 2014 Contran	Feb. 28, 2014 Contran Minimum
Basis Of Presentation And Significant Accounting Policies [Line Items]
Controlling interest in subsidiary			94.00%
Minimum percentage of voting stock ownership required to designate a board member				5.00%
Common stock, voting rights		The voting agreement expires in February 2017 (unless Ms. Lisa Simmons, Ms. Connelly and Ms. Annette Simmons otherwise unanimously agree), and the ability of Ms. Lisa Simmons, Ms. Connelly, and Ms. Annette Simmons to each designate one member of the Contran board is dependent upon each of their continued beneficial ownership of at least 5% of the combined voting stock of Contran.
Voting agreement expiration date		2017-02
Size of board of directors		5
Dividend declared	$ 0.02