Quarterly Information (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended								12 Months Ended
		Oct. 31, 2017	Jul. 31, 2017	Apr. 30, 2017	Jan. 31, 2017	Oct. 31, 2016	Jul. 31, 2016	Apr. 30, 2016	Jan. 31, 2016	Oct. 31, 2017	Oct. 31, 2016	Oct. 31, 2015
Quarterly Information Unaudited [Abstract]
Revenues		$ 47,889	$ 10,358	$ 20,417	$ 17,002	$ 24,473	$ 21,716	$ 28,581	$ 33,482	$ 95,666	$ 108,252	$ 163,077
Gross profit (loss)		3,164	(2,626)	383	1,813	(468)	434	(157)	(166)	2,734	(357)	12,776
Loss on operations		(8,181)	(14,330)	(11,496)	(10,928)	(11,805)	(10,323)	(12,708)	(11,517)	(44,935)	(46,353)	(28,892)
Net loss		(9,979)	(17,001)	(13,238)	(13,685)	(12,948)	(11,067)	(15,414)	(11,779)	(53,903)	(51,208)	(29,684)
Preferred stock dividends		(800)	(800)	(800)	(800)	(800)	(800)	(800)	(800)	(3,200)	(3,200)	(3,200)
Net loss to common stockholders		$ (10,779)	$ (17,801)	$ (14,038)	$ (14,485)	$ (13,662)	$ (11,810)	$ (16,173)	$ (12,512)	$ (57,103)	$ (54,157)	$ (32,559)
Net loss to common stockholders per basic and diluted common share	[1]	$ (0.17)	$ (0.31)	$ (0.33)	$ (0.39)	$ (0.41)	$ (0.38)	$ (0.56)	$ (0.48)	$ (1.14)	$ (1.82)

[1] The full year net loss to common stockholders basic and diluted share may not equal the sum of the quarters due to weighting of outstanding shares