Convertible notes principal amount.

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- Definition

Debt discounts and debt issue costs amortization rate.

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No definition available.

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- Definition

Debt instrument, redemption, amount.

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No definition available.

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- Definition

Debt instrument, redemption, face value of each bond redeemed.

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No definition available.

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- Definition

Discount on sale of convertible notes.

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No definition available.

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- Definition

Discount rate used in computation of interest payment.

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No definition available.

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- Definition

Excess to percentage of conversion price.

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No definition available.

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- Definition

Line of credit facility additional borrowing capacity.

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No definition available.

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Minimum percentage of debt holding for immediate payment in case of default.

+ References

No definition available.

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- Definition

Number of bonds redeemed.

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No definition available.

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- Definition

Number of consecutive trading days required for redemption.

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No definition available.

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Number of trading days required for redemption.

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No definition available.

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Percentage of aggregate principal amount outstanding.

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No definition available.

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Percentage of principal amount and accrued and unpaid interest for repurchase of debt.

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No definition available.

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Period of amortization of debt discount.

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No definition available.

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Amount of amortization expense attributable to debt discount (premium) and debt issuance costs.

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- Definition

The maximum number of common shares permitted to be issued by an entity's charter and bylaws.

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Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.

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The name of the original debt issue that has been converted in a noncash (or part noncash) transaction during the accounting period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

+ References

No definition available.

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Amount of short-term debt and current maturity of long-term debt and capital lease obligations due within one year or the normal operating cycle, if longer.

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Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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The price per share of the conversion feature embedded in the debt instrument.

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Ratio applied to the conversion of debt instrument into equity with equity shares divided by debt principal amount.

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Latest date when the debt instrument can be converted into equity, in CCYY-MM-DD format.

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Remaining amortization period for discount on the liability component of convertible debt which may be settled in cash upon conversion, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Threshold period of specified consecutive trading days within which common stock price to conversion price of convertible debt instruments must exceed threshold percentage for a specified number of trading days to trigger conversion feature, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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No definition available.

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Minimum percentage of common stock price to conversion price of convertible debt instruments to determine eligibility of conversion.

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No definition available.

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- Definition

Face (par) amount of debt instrument at time of issuance.

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- Definition

Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

+ References

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

+ References

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Amount of the required periodic payments applied to principal.

+ References

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- Definition

Fair value amount of debt instrument that was repurchased.

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No definition available.

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- Definition

Amount, after accumulated amortization, of debt discount.

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Amount of debt discount to be amortized within one year or within the normal operating cycle, if longer.

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Amount of debt discount to be amortized after one year or the normal operating cycle, if longer.

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- Definition

Amount, before accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

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The difference between the reacquisition price and the net carrying amount of the extinguished debt recognized currently as a component of income in the period of extinguishment, net of tax.

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Amount of the cost of borrowed funds accounted for as interest expense for debt.

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The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility.

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.

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No definition available.

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The interest rate applicable to the portion of the carrying amount of long-term borrowings outstanding as of the balance sheet date, including current maturities, which accrues interest at a set, unchanging rate.

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Interest paid other than in cash for example by issuing additional debt securities. As a noncash item, it is added to net income when calculating cash provided by or used in operations using the indirect method.

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The cash inflow from the issuance of a long-term debt instrument which can be exchanged for a specified amount of another security, typically the entity's common stock, at the option of the issuer or the holder.

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Cash and equivalents whose use in whole or in part is restricted for the long-term, generally by contractual agreements or regulatory requirements.

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The remaining balance of debt issuance expenses that were capitalized and are being amortized against income over the lives of the respective bond issues. This does not include the amounts capitalized as part of the cost of the utility plant or asset.

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Senior Secured Debt, Secured Debt and Convertible Notes - Additional Information (Detail)	1 Months Ended							12 Months Ended
	Feb. 28, 2017 USD ($)	Dec. 31, 2016 USD ($) $ / shares shares	Sep. 30, 2016 USD ($) shares	Nov. 30, 2015 USD ($) Bond shares	Feb. 28, 2015 USD ($) Bond shares	Jun. 30, 2014 USD ($) $ / shares	Jul. 31, 2012 USD ($)	Dec. 31, 2016 USD ($) $ / shares shares	Dec. 31, 2015 USD ($) shares	Dec. 31, 2014 USD ($)	Jan. 31, 2017 USD ($) shares	Mar. 27, 2015 USD ($)	May 31, 2014 USD ($)	Jan. 31, 2012 USD ($)	Oct. 31, 2011 USD ($)
Debt Instrument [Line Items]
Aggregate principal amount outstanding						10.00%
Restricted deposits		$ 2,611,000						$ 2,611,000	$ 2,611,000
Common stock, shares authorized \| shares		250,000,000						250,000,000	250,000,000
Estimated fair value of principal amount									$ 21,565,000
Interest expense								$ 7,837,000	8,243,000	$ 8,255,000
Secured debt									504,000
Unamortized debt discount, current portion									17,000
Unamortized debt discount, long-term portion									2,000
Unamortized debt issue costs									2,000
Debt Instrument, repurchase amount		$ 15,000,000						15,000,000						$ 5,000,000	$ 10,000,000
Debt instrument, periodic payment, principal								$ 9,800,000
Long term borrowing interest rate		9.00%						9.00%
Amortization period of debt issuance cost								36 months
Proceeds from issuance of convertible debt, net										25,907,000
Non-cash interest expense								$ 3,977,000	$ 3,772,000	7,860,000
Common stock shares issued \| shares		7,074,246						7,074,246	1,080,352
Convertible 2017 Notes
Debt Instrument [Line Items]
Debt instrument maturity date								Mar. 15, 2017	Mar. 15, 2017
Debt issuance cost		$ 1,500,000						$ 1,500,000				$ 4,200,000
Conversion Price \| $ / shares		$ 344.83				$ 344.83		$ 344.83
Debt Conversion, Description								The 2017 Notes have a conversion price (the “Conversion Price”) equal to $344.83 per share or 0.0029 shares per $1 principal amount of 2017 Notes.
Conversion Rate								0.0029
Debt instrument, face amount		$ 26,100,000						$ 26,100,000
Debt instrument, convertible, conversion price		$ 1,000						$ 1,000
Number of consecutive trading days required for redemption								10 days
Excess to percentage of conversion price								150.00%
Common stock, shares authorized \| shares		60,000						60,000
Estimated fair value of principal amount		$ 25,769,000						$ 25,769,000	$ 21,565,000
Interest expense								2,600,000
Aggregate principal amount on sale of convertible notes		$ 26,108,000						$ 26,108,000	26,108,000
Convertible 2017 Notes \| Change In Accounting Method Accounted For As Change In Estimate
Debt Instrument [Line Items]
Percentage repurchase price								100.00%
Convertible 2017 Notes \| Whitebox
Debt Instrument [Line Items]
Debt instrument maturity date								Mar. 15, 2017
2022 Notes
Debt Instrument [Line Items]
Debt instrument maturity date								Jul. 01, 2022
Debt issuance cost							$ 1,400,000
Debt instrument, interest rate							7.50%
Conversion Price \| $ / shares		$ 1,707.65						$ 1,707.65
Conversion Rate								0.5856
Debt instrument, convertible, conversion price		$ 1,000						$ 1,000
Interest expense								$ 1,200,000	1,800,000	2,000,000
Amortization period of debt issuance cost								5 years
Aggregate principal amount on sale of convertible notes							$ 45,000,000
Proceeds from issuance of convertible debt, net							40,900,000
Discount on sale of convertible notes							$ 2,700,000
Non-cash interest expense								$ 4,000,000	$ 3,700,000	2,800,000
Debt discounts and debt issue costs amortization rate								40.00%
Amortization period of debt discount								5 years
2022 notes, conversion date							Jul. 01, 2017	Jul. 01, 2017
Discount rate used in computation of interest payment								2.00%
Convertible senior secured note, percentage of stock price								90.00%
Number of trading days for valuation								10 days
Common stock shares issued \| shares		251,832	699,968	55,392	8,502			251,832
Number of bonds redeemed \| Bond				2,500	2,000
Face value of each bond redeemed				$ 1,000	$ 1,000
Redemption of debt instrument		$ 1,400,000	$ 11,400,000	2,500,000	2,000,000
Net gain (loss) on extinguishment of debt instrument		$ 100,000	(900,000)	$ (50,000)	$ 300,000
Required principal amount in percentage								25.00%
First Installment
Debt Instrument [Line Items]
Aggregate outstanding principal amount of term loan						$ 25,900,000
Make-Whole Fundamental Change \| 2022 Notes \| Maximum
Debt Instrument [Line Items]
Conversion Rate								0.6734
Provisional Redemption \| 2022 Notes
Debt Instrument [Line Items]
Number of consecutive trading days required for redemption								30 days
Excess to percentage of conversion price								150.00%
Number of trading days required for redemption								20 or more trading days
Term Loans
Debt Instrument [Line Items]
Debt instrument, interest rate		12.00%						12.00%					15.00%
Term Loans \| Interest Payable In Cash
Debt Instrument [Line Items]
Debt instrument, interest rate		6.00%						6.00%					5.00%
Term Loans \| Interest Payable In Kind
Debt Instrument [Line Items]
Debt instrument, interest rate		6.00%						6.00%					10.00%
Term Loans \| First Installment
Debt Instrument [Line Items]
Accrued paid in kind interest						$ 200,000
Amended Agri-Energy Loan Agreement
Debt Instrument [Line Items]
Secured debt			$ 0
Debt instrument, additional term loan															$ 15,000,000
Loan Agreement
Debt Instrument [Line Items]
Debt instrument maturity date								Mar. 15, 2017
Loan Agreement \| Term Loans
Debt Instrument [Line Items]
Line of credit, maximum borrowing capacity													$ 31,100,000
Loan Agreement \| Term Loans \| First Installment
Debt Instrument [Line Items]
Line Of Credit Facility Current Borrowing Capacity													22,800,000
Debt, discount													1,600,000
Debt issuance cost													$ 1,500,000
2014 Amendments
Debt Instrument [Line Items]
Debt instrument maturity date								May 31, 2017
Secured debt										$ 800,000
Subsequent Event \| Convertible 2017 Notes \| Whitebox
Debt Instrument [Line Items]
Debt instrument maturity date	Jun. 23, 2017
Subsequent Event \| 2022 Notes
Debt Instrument [Line Items]
Aggregate principal amount on sale of convertible notes											$ 8,400,000
Common stock shares issued \| shares											2,155,382
Subsequent Event \| First Installment \| Convertible 2017 Notes \| Whitebox
Debt Instrument [Line Items]
Debt instrument, periodic payment, principal	$ 2,000,000
Subsequent Event \| Loan Agreement
Debt Instrument [Line Items]
Debt instrument maturity date	Jun. 23, 2017