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Subsequent Events	6 Months Ended
Subsequent Events	Jun. 30, 2019
Subsequent Events [Abstract]
Subsequent Events	Subsequent Event On August 8, 2019, we signed a definitive agreement to sell our former headquarters building in Johnson City, Tennessee, for net proceeds of approximately $4 million. We anticipate the closing of this sale will occur during the third quarter of 2019 and result in no material gain or loss as a result of the disposition