Accrued Expenses and Other Current Liabilities (Schedule of Accrued Liabilities) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Dec. 31, 2013
Payables and Accruals [Abstract]
Compensation	$ 5,457	$ 1,797
Warranty	1,904	2,285	3,132
Termination fee	2,775	2,775
Professional fees	509us-gaap_AccruedProfessionalFeesCurrent	2,181us-gaap_AccruedProfessionalFeesCurrent
Royalty	13us-gaap_AccruedRoyaltiesCurrent	0us-gaap_AccruedRoyaltiesCurrent
Customer deposits	551us-gaap_CustomerDepositsCurrent	593us-gaap_CustomerDepositsCurrent
Deferred revenue	49us-gaap_DeferredRevenueCurrent	97us-gaap_DeferredRevenueCurrent
Self insurance	1,249us-gaap_SelfInsuranceReserveCurrent	1,470us-gaap_SelfInsuranceReserveCurrent
Income and other taxes	5,618us-gaap_AccruedIncomeTaxesCurrent	1,433us-gaap_AccruedIncomeTaxesCurrent
Loss on sale contracts	204us-gaap_ProvisionForLossOnContracts	119us-gaap_ProvisionForLossOnContracts
Severance accruals	2,061us-gaap_RestructuringReserveCurrent	1,317us-gaap_RestructuringReserveCurrent
Loss on inventory purchase commitments	0	306
Amounts owed to SolAero	3,767us-gaap_LitigationReserveCurrent	0us-gaap_LitigationReserveCurrent
Other	1,069us-gaap_OtherAccruedLiabilitiesCurrent	836us-gaap_OtherAccruedLiabilitiesCurrent
Accrued expenses and other current liabilities	$ 25,226	$ 15,209

Carrying amount as of the balance sheet date of the unpaid sum of the known and estimated amounts payable to satisfy all currently due domestic and foreign income tax obligations.

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Amount of obligations incurred and payable, pertaining to costs that are statutory in nature, incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered. Examples include, but not limited to, taxes, interest, rent and utilities. Also includes the aggregate carrying amount of liabilities not separately disclosed.

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Carrying value as of the balance sheet date of obligations incurred through that date and payable for professional fees, such as for legal and accounting services received. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

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Carrying value as of the balance sheet date of obligations incurred through that date and payable for royalties. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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The current portion of money or property received from customers which is either to be returned upon satisfactory contract completion or applied to customer receivables in accordance with the terms of the contract or the understandings.

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-SubTopic 10

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-Paragraph 1

-Subparagraph (SX 210.5-02.20)

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The carrying amount of consideration received or receivable as of the balance sheet date on potential earnings that were not recognized as revenue in conformity with GAAP, and which are expected to be recognized as such within one year or the normal operating cycle, if longer, including sales, license fees, and royalties, but excluding interest income.

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 605

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SAB TOPIC 13.A.4(a).Q1)

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-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 13

-Section A

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Total of the carrying values as of the balance sheet date of obligations incurred through that date and payable for obligations related to services received from employees, such as accrued salaries and bonuses, payroll taxes and fringe benefits. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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- Definition

The amount of early contract termination fees included in liabilities subject to compromise.

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 852

-SubTopic 10

-Section 55

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Carrying amount of reserve for known or estimated probable loss from litigation, which may include attorneys' fees and other litigation costs, which is expected to be paid within one year of the date of the statement of financial position.

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-Name Accounting Standards Codification

-Topic 450

-SubTopic 20

-Section 50

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-Subparagraph (SX 210.5-02.25)

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Amount of loss contingency liability expected to be resolved within one year or the normal operating cycle, if longer.

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Carrying value as of the balance sheet date of obligations incurred through that date and payable arising from transactions not otherwise specified in the taxonomy. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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Carrying value as of the balance sheet date of obligations incurred through that date and payable for estimated claims under standard and extended warranty protection rights granted to customers. For classified balance sheets, represents the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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

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-Publisher FASB

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-Topic 605

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Carrying amount as of the balance sheet date of known and estimated obligations associated with exit from or disposal of business activities or restructurings pursuant to a duly authorized plan, which are expected to be paid in the next twelve months or in the normal operating cycle if longer. Costs of such activities include those for one-time termination benefits, termination of an operating lease or other contract, consolidating or closing facilities, relocating employees, and costs associated with an ongoing benefit arrangement, but excludes costs associated with the retirement of a long-lived asset.

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-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 5

-Section P

-Subsection 4

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-Topic 420

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (b)

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Carrying amount of accrued known and estimated losses incurred as of the balance sheet date for which no insurance coverage exists, and for which a claim has been made or is probable of being asserted, typically arising from workmen's compensation-type of incidents and personal injury to nonemployees from accidents on the entity's property that are expected to be paid within one year (or the normal operating cycle, if longer).

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