Construction Contracts in Progress (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014 contract	Dec. 31, 2013 contract
LongTermContractsOrProgramsDisclosureTextBlockAbstract
Number of Contracts	1ftek_NumberOfContracts	3ftek_NumberOfContracts
Provision for Loss on Contracts (in Dollars)	$ 4us-gaap_ProvisionForLossOnContracts	$ 68us-gaap_ProvisionForLossOnContracts

Cumulative provision for contract losses not offset against related costs accumulated on the balance sheet.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 605

-SubTopic 35

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6802688&loc=d3e57777-111642

Name:	us-gaap_ProvisionForLossOnContracts
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant