Description Of Business (Details) $ in Millions	Mar. 05, 2018 USD ($)	Dec. 31, 2017 item
Installed base \| item		128
Subsequent Event [Member]
Proceeds from Warrant Exercises \| $	$ 10.0

The cash inflow associated with the amount received from holders exercising their stock warrants.

No definition available.

Name:	us-gaap_ProceedsFromWarrantExercises
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration