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Deferred Costs (Notes)	12 Months Ended
	Dec. 31, 2018
Deferred Costs [Abstract]
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Table Text Block]	Deferred Costs Deferred costs, which primarily consist of deferred sales commissions, were $17.5 million and $6.3 million as of December 31, 2018 and December 31, 2017, respectively. Amortization expense for the deferred costs was $3.0 million and $2.5 million for the year ended December 31, 2018 and 2017, respectively. There was no impairment loss in relation to the costs capitalized for the periods presented.

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The entire disclosure for other assets. This disclosure includes other current assets and other noncurrent assets.

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