Deferred Revenue and Income (Details) - USD ($)	1 Months Ended	12 Months Ended
	Jan. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Aug. 31, 2012
Deferred Revenue Disclosure [Abstract]
Products and services not yet delivered		$ 71,000	$ 35,000
Arizona Commerce Authority grant		1,000,000	0
Total current deferred revenue and income		1,071,000	35,000
Arizona Commerce Authority grant		0	1,000,000
Total long-term deferred income		0	1,000,000
Milestone payments received		1,000,000		$ 1,000,000
Deferred Revenue Arrangement [Line Items]
Deferred revenue recognized		$ 0	$ 114,000
Subsequent Event
Deferred Revenue Arrangement [Line Items]
Deferred revenue recognized	$ 1,000,000