Debt instrument convertible threshold consecutive trading day.

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- Definition

Debt instrument exchange completion date.

+ References

No definition available.

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- Definition

Principal amount per share.

+ References

No definition available.

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- Definition

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.

+ References

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- Definition

The value of the financial instrument(s) that the original debt is being converted into in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

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- Definition

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

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- Definition

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

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- Definition

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

+ References

No definition available.

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- Definition

Threshold number of specified trading days that common stock price to conversion price of convertible debt instruments must exceed threshold percentage within a specified consecutive trading period to trigger conversion feature.

+ References

No definition available.

+ Details

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- Definition

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

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- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ 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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- Definition

Description of debt redemption features under terms of the debt agreement.

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- Definition

Percentage price of original principal amount of debt at which debt can be redeemed by the issuer.

+ References

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- Definition

Amount, after accumulated amortization, of debt premium.

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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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- Definition

Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

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- Definition

Per share or per unit amount of equity securities issued.

+ References

No definition available.

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- Definition

Number of new stock issued during the period.

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- Definition

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.

+ References

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Borrowings - Senior Convertible Notes Due 2021 - Additional Information (Detail) $ / shares in Units, $ in Thousands				3 Months Ended			6 Months Ended
	May 31, 2018 USD ($)	May 25, 2018 USD ($) $ / shares shares	Oct. 23, 2017 USD ($) d $ / shares shares	Jun. 30, 2018 USD ($) shares	Dec. 31, 2017 USD ($) shares	Jun. 30, 2017 USD ($)	Jun. 30, 2018 USD ($) shares	Jun. 30, 2017 USD ($)
Debt Instrument [Line Items]
Principal amount				$ 129,200			$ 129,200
Gain (Loss) on extinguishment of debt				$ 772		$ (830)	$ (53)	$ (830)
Common stock, shares issued \| shares				145,619,293	119,053,414		145,619,293
Common Stock
Debt Instrument [Line Items]
Number of shares sold in underwritten public offering \| shares			973,236
5.75% Senior convertible notes due August 15, 2018
Debt Instrument [Line Items]
Senior notes, effective interest rate			5.75%
Principal amount			$ 27,700
Conversion price of shares \| $ / shares			$ 34
Gain (Loss) on extinguishment of debt					$ (800)
Debt issuance costs					300
Unamortized premium					200
No of convertible shares			194.1748
Principal amount per share \| $ / shares			$ 1,000
Percentage of repurchase price			100.00%
Debt Instrument, redemption description							The Company may elect at its option to cause all or any portion of the 2021 notes to be mandatorily converted in whole or part at any time prior to the close of business on the business day immediately preceding the maturity date, if the last reported sale price of its common stock exceeds 120% of the conversion price then in effect for at least 10 trading days in any 20 consecutive trading day period, ending within five business days prior to the date of the mandatory conversion notice. The redemption price is equal the sum of 100% of the principal amount of the 2021 notes to be redeemed, plus accrued and unpaid interest.
Percentage of conversion price equaling stock price			120.00%
Number of trading days \| d			10
Consecutive trading days			20 days
Debt Issuance Cost					800
5.75% Senior convertible notes due October 23, 2021
Debt Instrument [Line Items]
Senior notes, effective interest rate			5.75%	5.75%			5.75%
Principal amount			$ 23,700	$ 18,690	23,690		$ 18,690
Conversion price of shares \| $ / shares			$ 5.15
Unamortized premium				$ 471	$ 721		$ 471
5.75% Senior convertible notes due October 23, 2021 \| Maximum
Debt Instrument [Line Items]
Common stock, shares issued \| shares			13,648,300
5.75% Senior convertible notes due October 23, 2021 \| Privately-Negotiated Exchange Agreement
Debt Instrument [Line Items]
Senior notes, effective interest rate		5.75%
Gain (Loss) on extinguishment of debt	$ 800
Common stock, shares issued \| shares		2,250,000
Conversion of notes to common shares, value		$ 5,000
Exchange price per share \| $ / shares		$ 2.2567
Exchange completion date		May 31, 2018