FAIR VALUE ACCOUNTING - Fair Value Measurements, Recurring and Nonrecurring (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments accounted for at fair value	$ 780	$ 650
Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments accounted for at fair value	779	654
Time Deposits	2,247	630
Short-term Investments		4,208
Warrant liabilities (Note 12)	(8,573)	(2,791)
Convertible Debentures (Note 11)		16,382
Fair Value, Net Asset (Liability)	(5,547)	(13,681)
Fair Value, Measurements, Recurring [Member] \| Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments accounted for at fair value	779	654
Time Deposits	2,247	630
Short-term Investments		0
Warrant liabilities (Note 12)	(8,573)	(2,791)
Convertible Debentures (Note 11)		16,382
Fair Value, Net Asset (Liability)	(5,547)	(17,889)
Fair Value, Measurements, Recurring [Member] \| Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments accounted for at fair value	0	0
Time Deposits	0	0
Short-term Investments		4,208
Warrant liabilities (Note 12)	0	0
Convertible Debentures (Note 11)		0
Fair Value, Net Asset (Liability)	0	4,208
Fair Value, Measurements, Recurring [Member] \| Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments accounted for at fair value	0	0
Time Deposits	0	0
Short-term Investments		0
Warrant liabilities (Note 12)	0	0
Convertible Debentures (Note 11)		0
Fair Value, Net Asset (Liability)	$ 0	$ 0

Carrying value as of the balance sheet date of long-term debt (with maturities initially due after one year or beyond the operating cycle if longer) identified as Convertible Notes Payable, excluding current portion. Convertible Notes Payable is a written promise to pay a note which can be exchanged for a specified amount of another, related security, at the option of the issuer and the holder.

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Fair value of asset after deduction of liability.

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Fair value portion of investment securities, including, but not limited to, marketable securities, derivative financial instruments, and investments accounted for under the equity method.

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Amount of investments including trading securities, available-for-sale securities, held-to-maturity securities, and short-term investments classified as other and current.

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Amount of time deposit liabilities, including certificates of deposit.

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