Subsequent Event (Details) $ / shares in Units, $ in Thousands		6 Months Ended
Jul. 15, 2019 USD ($) Tranche $ / shares shares	Jun. 30, 2019 shares
Perceptive Credit Opportunities Fund, LP [Member]
Debt Refinancing & Warrant Issuance [Abstract]
Warrants issued (in shares) \| shares		863,400
Perceptive Credit Opportunities Fund, LP [Member] \| Line of Credit [Member]
Debt Refinancing & Warrant Issuance [Abstract]
Interest rate		2.00%
Debt maturity date		Dec. 16, 2020
Subsequent Event [Member]
Debt Refinancing & Warrant Issuance [Abstract]
Warrants issued (in shares) \| shares	2,000,000
Net proceeds from issuance of initial notes, warrants and first offer rights	$ 66,951
Remaining proceeds after repayment of debt	$ 14,859
Warrant exercise price (in dollars per share) \| $ / shares	$ 4.25
Warrants term	6 years
Subsequent Event [Member] \| Perceptive Credit Opportunities Fund, LP [Member] \| Line of Credit [Member]
Debt Refinancing & Warrant Issuance [Abstract]
Payment of existing debt obligation	$ (52,092)
Subsequent Event [Member] \| Senior Secured Notes Due 2025 [Member]
Debt Refinancing & Warrant Issuance [Abstract]
Principal amount	$ 70,000
Interest rate	12.50%
Number of tranches \| Tranche	2
Frequency of periodic principal payment	quarterly
Debt maturity date	Jun. 30, 2025
Annual percentage increase in principal payments during first four quarters	10.00%
Annual percentage increase of initial loan principal payments during final four quarters	40.00%
Redemption percentage of debt under change of control provisions	101.00%
Subsequent Event [Member] \| Senior Secured Notes Due 2025 [Member] \| Minimum [Member]
Debt Refinancing & Warrant Issuance [Abstract]
Elective redemption percentage of debt	101.56%
Subsequent Event [Member] \| Senior Secured Notes Due 2025 [Member] \| Maximum [Member]
Debt Refinancing & Warrant Issuance [Abstract]
Principal amount	$ 100,000
Additional borrowing capacity	$ 30,000
Elective redemption percentage of debt	112.50%
Asset based loans secured on second priority lien by receivables and inventory assets	$ 10,000
Portion of proceeds used to monetize assets, if First Additional Offering has not been elected or funded	40,000
Portion of proceeds used to monetize assets, if First Additional Offering has been elected and funded	50,000
Subsequent Event [Member] \| Senior Secured Notes Due 2025 - First Additional Offering [Member]
Debt Refinancing & Warrant Issuance [Abstract]
Additional borrowing capacity	10,000
Subsequent Event [Member] \| Senior Secured Notes Due 2025 - Second Additional Offering [Member]
Debt Refinancing & Warrant Issuance [Abstract]
Additional borrowing capacity	$ 20,000

The annual percentage increase in principal payments during first four quarters

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The annual percentage increase of initial loan principal payments during final four quarters.

+ References

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Asset based loans secured on second priority lien by receivables and inventory assets

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Amount of debt that can be borrowed in addition to initial notes.

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Number of Tranches in which additional loan may become available under the debt instrument.

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Elective redemption percentage of debt.

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The net cash inflow associated with the amount received from issuance of initial notes, warrants and first offer rights.

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The portion of proceeds amount to monetize asset if the First Additional Offering has not been elected or funded.

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The portion of proceeds amount to monetize asset if the First Additional Offering has been elected and funded.

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Redemption percentage of debt under change of control provisions.

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Amount of remaining proceeds from issuance of initial notes, warrants and first offer rights after repayment of debt.

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No definition available.

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Exercise price per share or per unit of warrants or rights outstanding.

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Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares.

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

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Description of the frequency of periodic payments (monthly, quarterly, annual).

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

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- Definition

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

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- Definition

The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer.

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Period between issuance and expiration of outstanding warrant and right embodying unconditional obligation requiring redemption by transferring asset at specified or determinable date or upon event certain to occur, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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