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Marketable Securities	3 Months Ended
Marketable Securities	Mar. 31, 2020
Marketable Securities [Abstract]
Marketable Securities	Marketable Securities The Company did not hold any marketable securities at March 31, 2020 or December 31, 2019. There were no sales of available-for-sale securities during the three months ended March 31, 2020 or 2019. Net unrealized holding gains or losses for the period that have been included in accumulated other comprehensive loss were not material to the Company’s consolidated results of operations.