Accounts Receivable (Details) (USD $)	Apr. 30, 2015		Oct. 31, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
Government Contract Receivable	$ 3,411,000		$ 2,517,000
Government Contract Receivable, Unbilled Amounts	3,389,000		2,886,000
U.S. Government accounts receivable total	6,800,000	[1]	5,403,000	[1]
Contract Receivable	7,814,000		8,871,000
Unbilled Contracts Receivable	28,907,000		50,101,000
Commercial Customers accounts receivable	36,721,000		58,972,000
Accounts Receivable, Net, Current	43,521,000		64,375,000
Allowance for Doubtful Accounts Receivable, Current	132,000		132,000
POSCO Energy [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts Receivable, Related Parties, Current	12,300,000		29,900,000
NRG Energy, Inc. [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts Receivable, Related Parties, Current	100,000		0
Government [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Government Contract Receivable	$ 3,400,000		$ 1,700,000

[1] Total U.S. Government accounts receivable outstanding as of April 30, 2015 and October 31, 2014 was $3.4 million and $1.7 million, respectively.