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Marketable Securities	6 Months Ended
	Jun. 30, 2021
Marketable Securities [Abstract]
Marketable Securities	Short-Term InvestmentsAs of June 30, 2021 and December 31, 2020, short-term investments consisted of certificates of deposit. These securities are classified as current based upon their maturities. As of June 30, 2021 and December 31, 2020 short-term investments amounted to $40,513 and $39,302, respectively, and have maturities of one year or less.

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Marketable Securities, Available-for-sale Securities [Text Block]

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