DEBT - CONVERTIBLE DEBT INFORMATION (Details) - 1.00% Convertible Notes due 2018 - USD ($) $ in Thousands	Jun. 30, 2018	Mar. 31, 2018	Jun. 18, 2013
Debt Instrument [Line Items]
Interest rate	1.00%
Convertible Debt
Debt Instrument [Line Items]
Interest rate			1.00%
Additional paid-in capital	$ 35,784	$ 35,784
Principal amount of Convertible Notes	5,232	8,160
Unamortized discount of the liability component	0	89
Carrying amount of debt issuance costs	0	3
Net carrying amount of Convertible Notes	$ 5,232	$ 8,068

Excess of issue price over par or stated value of the entity's capital stock and amounts received from other transactions involving the entity's stock or stockholders. Includes adjustments to additional paid in capital. Some examples of such adjustments include recording the issuance of debt with a beneficial conversion feature and certain tax consequences of equity instruments awarded to employees. Use this element for the aggregate amount of additional paid-in capital associated with common and preferred stock. For additional paid-in capital associated with only common stock, use the element additional paid in capital, common stock. For additional paid-in capital associated with only preferred stock, use the element additional paid in capital, preferred stock.

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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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- Definition

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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Amount, after accumulated amortization, of debt discount.

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- Definition

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

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- Definition

Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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