Quarterly Financial Data (unaudited) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Quarterly Financial Information Disclosure [Abstract]
Revenue	$ 10,853	$ 9,362	$ 8,548	$ 6,771	$ 6,319	$ 5,689	$ 5,185	$ 4,488	$ 35,534	$ 21,681	$ 10,514
Operating expenses	18,912	27,647	13,088	10,966	10,301	9,958	9,626	8,570	70,613	38,455	22,182
Loss from operations	(8,059)	(18,285)	(4,540)	(4,195)	(3,982)	(4,269)	(4,441)	(4,082)	(35,079)	(16,774)	(11,668)
Net loss	$ (8,321)	$ (20,363)	$ (4,895)	$ (6,043)	$ (4,499)	$ (4,782)	$ (4,943)	$ (4,569)	$ (39,622)	$ (18,793)	$ (18,928)
Net loss per share available to Textura Corporation common stockholders, basic and diluted	$ (0.36)	$ (2.31)	$ (0.56)	$ (0.62)	$ (0.75)	$ (0.49)	$ (0.53)	$ (0.54)	$ (3.58)	$ (2.31)	$ (4.18)