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Earnings per Share Basis and Diluted (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Numerator
Net income (loss)	$ (17,525)	$ (18,857)	$ (57,600)	$ (58,800)
Denominator
Weighted average shares (basic)	44,386	43,347	44,318	43,251
Dilutive effect of potential common shares	0	0	0	0
Weighted average shares (diluted)	44,386	43,347	44,318	43,251
Basic Earnings Per Share	$ (0.39)	$ (0.44)	$ (1.30)	$ (1.36)
Diluted earnings per share	$ (0.39)	$ (0.44)	$ (1.30)	$ (1.36)

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
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