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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Fair value Instruments - Recurring (Details) - Recurring basis - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
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Fair value measurements |  |
Total assets and liabilities measured at fair value | $ 16,365 | $ 15,769
Certificate of deposit |  |
Fair value measurements |  |
Cash and cash equivalents | 380 | 380
Money market funds |  |
Fair value measurements |  |
Cash and cash equivalents | 2,785 | 2,329
Short Term Investments |  |
Fair value measurements |  |
Investments |  | 416
Other investments |  |
Fair value measurements |  |
Investments | 13,357 | 12,700
Interest rate swap |  |
Fair value measurements |  |
Derivative liabilities | (157) | (56)
Level 1 |  |
Fair value measurements |  |
Total assets and liabilities measured at fair value | 2,785 | 2,745
Level 1 | Money market funds |  |
Fair value measurements |  |
Cash and cash equivalents | 2,785 | 2,329
Level 1 | Short Term Investments |  |
Fair value measurements |  |
Investments |  | 416
Level 2 |  |
Fair value measurements |  |
Total assets and liabilities measured at fair value | 223 | 324
Level 2 | Certificate of deposit |  |
Fair value measurements |  |
Cash and cash equivalents | 380 | 380
Level 2 | Interest rate swap |  |
Fair value measurements |  |
Derivative liabilities | (157) | (56)
Level 3 |  |
Fair value measurements |  |
Total assets and liabilities measured at fair value | 13,357 | 12,700
Level 3 | Other investments |  |
Fair value measurements |  |
Investments | $ 13,357 | $ 12,700

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- Definition Fair value portion 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. + References No definition available. + Details
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- Definition Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities not subject to a master netting arrangement and not elected to be offset. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=121572278&loc=d3e13433-108611 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=99393222&loc=SL20226008-175313 + Details
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- Definition 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. + References No definition available. + Details
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- Definition Fair value portion of investment securities, including, but not limited to, marketable securities, derivative financial instruments, and investments accounted for under the equity method. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
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