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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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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.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 30
-Section 45
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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.

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Amount of unrealized gain (loss) recognized in the income statement on unsold other securities.

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