It represents the additions made to debt instrument unamortized discount during the period.

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Class of warrant or right, expiration date.

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Debt consulting placement fee.

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Debt default long term debt percentage.

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This represents the debt instrument cash maintenance amount.

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Debt instrument prepayment percentage.

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No definition available.

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- Definition

The amount of upfront payment received by the entity under the agreement.

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No definition available.

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- Definition

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

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Number of warrants or rights outstanding.

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- Definition

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

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Amount of the fee that accompanies borrowing money under the debt instrument.

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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.

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

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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.

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No definition available.

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Amount of the required periodic payments including both interest and principal payments.

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Amount of payment greater than the preceding installment payments to be paid at final maturity date of debt.

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No definition available.

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Amount, after accumulated amortization, of debt discount.

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Represents the charge against earnings during the period for commitment fees and debt issuance expenses.

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Carrying value as of the balance sheet date of [accrued] interest payable on all forms of debt, including trade payables, that has been incurred and is unpaid. 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 cash inflow associated with the amount received from entity's raising of capital via private rather than public placement.

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The cash inflow from the issuance of common stock, preferred stock, treasury stock, stock options, and other types of equity.

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The cash outflow during the period from the repayment of aggregate short-term and long-term debt. Excludes payment of capital lease obligations.

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No definition available.

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Amount of cash and cash equivalents restricted as to withdrawal or usage, classified as current. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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DEBT - Additional Information (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	1 Months Ended			3 Months Ended
	Jul. 31, 2017	Oct. 31, 2016	Jan. 31, 2015	Mar. 31, 2018	Mar. 31, 2017	Jun. 30, 2018	Dec. 31, 2017	Dec. 31, 2013
Debt Instrument [Line Items]
Debt instrument principal amount								$ 10,000
Debt default long term debt percentage								13.35%
Debt instrument, fee amount				$ 50
Debt consulting placement fee				100
Debt related commitment fees and debt issuance costs				5	$ 10
Debt instrument unamortized discount				20			$ 32
Debt instrument Cash Maintenance			$ 2,500
Repayments of Debt				483	445
Debt Instrument, Periodic Payment				$ 260
Debt Instrument, Interest Rate, Effective Percentage				10.16%
Proceeds from Issuance or Sale of Equity		$ 6,000
Interest Payable, Current				$ 745			700
Proceeds from Issuance of Private Placement	$ 4,000
Restricted Cash and Cash Equivalents, Current				0	$ 2,500
Term Loan [Member]
Debt Instrument [Line Items]
Debt related commitment fees and debt issuance costs				231
Interest Payable, Current				745			$ 700
Schutte Note [Member] \| Subsequent Event [Member]
Debt Instrument [Line Items]
Debt instrument principal amount						$ 1,000
Loan Agreement [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage								8.35%
Repayments of Debt		5,000	$ 5,000
Proceeds from Issuance or Sale of Equity		2,500
Maximum [Member]
Debt Instrument [Line Items]
Class of Warrant or Right, Exercise Price of Warrants or Rights			$ 7.98
Minimum [Member]
Debt Instrument [Line Items]
Class of Warrant or Right, Exercise Price of Warrants or Rights			$ 2.52
Proceeds from Issuance or Sale of Equity		$ 3,000
Main Pointe Agreement [Member]
Debt Instrument [Line Items]
Upfront Payments Received	2,500
Oxford Term Loan Agreement [Member]
Debt Instrument [Line Items]
Restricted Cash and Cash Equivalents, Current	$ 2,500
Warrant
Debt Instrument [Line Items]
Debt instrument unamortized discount				$ 400
Warrants to purchase common stock				60
Class of Warrant or Right, Exercise Price of Warrants or Rights				$ 2.52				$ 2.52
Warrants, expiry date				December 27, 2020
Additions To Debt Instrument Unamortized Discount			$ 33
First Revenue Event Occurs
Debt Instrument [Line Items]
Debt instrument periodic payment terms balloon payment to be paid				$ 795
Prior To December 27 2015
Debt Instrument [Line Items]
Debt instrument prepayment percentage				1.00%