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INVESTMENTS AND FAIR VALUE MEASUREMENTS (Details) $ in Thousands | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2020 USD ($) | Dec. 31, 2019 USD ($)
INVESTMENTS AND FAIR VALUE MEASUREMENTS (Details) [Line Items] |  |
Number of Securities in Unrealized Gain Position | 79 | 53
Number of Securities in Unrealized Loss Position | 0 | 18
Unrealized Gain (Loss) on Securities | $ 0 | $ (50)
Funds Held For Clients [Member] |  |
INVESTMENTS AND FAIR VALUE MEASUREMENTS (Details) [Line Items] |  |
Debt Securities, Available-for-sale, Current | 27,591 | 24,136
Money Market Funds, at Carrying Value | 47,694 | 48,500
Cash and Cash Equivalents [Member] |  |
INVESTMENTS AND FAIR VALUE MEASUREMENTS (Details) [Line Items] |  |
Money Market Funds, at Carrying Value | $ 16,505 |
Individually [Member] |  |
INVESTMENTS AND FAIR VALUE MEASUREMENTS (Details) [Line Items] |  |
Unrealized Gain (Loss) on Securities |  | $ (35)

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- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), classified as current. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121558606&loc=SL82898722-210454 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=121553693&loc=d3e26626-111562 + Details
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- Definition Investment in short-term money-market instruments (such as commercial paper, banker's acceptances, repurchase agreements, government securities, certificates of deposit, and so forth) which are highly liquid (that is, readily convertible to known amounts of cash) and so near their maturity that they present an insignificant risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify as cash equivalents by definition. Original maturity means an original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three-years ago does not become a cash equivalent when its remaining maturity is three months. + References No definition available. + Details
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