Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes 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. Excludes cash and cash equivalents within disposal group and discontinued operation.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section 45
-Paragraph 1
-Subparagraph (a)
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
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MANAGEMENT’S LIQUIDITY PLANS (Details) - USD ($) $ in Thousands		1 Months Ended	6 Months Ended
	Aug. 28, 2020	Aug. 11, 2021	Jun. 30, 2021	Dec. 31, 2020	Jun. 30, 2020	Dec. 31, 2019
MANAGEMENT’S LIQUIDITY PLANS (Details) [Line Items]
Working Capital (Deficit)			$ 13,600
Proceeds from Sale of Equity Method Investments		$ 9,100
At the Market Offering	$ 45,000		116,000
Cash and Cash Equivalents, at Carrying Value			15,504	$ 28,268	$ 36,927	$ 12,108
Series E Preferred Stock [Member]
MANAGEMENT’S LIQUIDITY PLANS (Details) [Line Items]
Proceeds from Sale of Equity Method Investments			$ 1,300