Significant Accounting Policies (Tables)

9 Months Ended

12 Months Ended

Sep. 30, 2017

Dec. 31, 2016

Summary of Significant Accounting Policies [Abstract]

Summary Of Activity Related To Warranty Liability Included In Other Current Liabilities

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2017		2016		2017		2016
		(unaudited)				(unaudited)
Beginning balance	$	589	$	540	$	584	$	599
Warranty accruals		(17)		(105)		118		3
Warranty claims		(8)		(23)		(138)		(190)
Ending balance	$	564	$	412	$	564	$	412

	Year Ended
	December 31,
	2016		2015
Beginning balance	$	599	$	663
Warranty accruals		375		455
Warranty claims		(390)		(519)
Ending balance	$	584	$	599

Schedule Of Estimated Future Amortization Expense

Fiscal Years Ending December 31,	Total Amortization
	(unaudited)
2017 (three months remaining)	$	13
2018		54
2019		32
2020		9
2021		8
Later years		32
	$	148

Fiscal Years ending December 31,		Total Amortization
2017	$	54
2018		54
2019		32
2020		9
2021		8
Later years		32
	$	189

Schedule Of Potentially Dilutive Common Stock Equivalents

	Three Months Ended		Nine Months Ended
	September 30,		September 30,
	2017	2016	2017	2016
	(unaudited)		(unaudited)
Options	5,142,448	5,010,993	5,142,448	5,010,993
Warrants	5,081,449	3,331,449	5,081,449	3,331,449
Convertible preferred stock	7,545,333	7,545,333	7,545,333	7,545,333
Total potentially dilutive common stock equivalents	17,769,230	15,887,775	17,769,230	15,887,775

	For the Year Ended December 31,
	2016	2015
Options	5,055,741	4,218,139
Warrants	3,331,449	2,600,000
Convertible preferred stock	7,545,333	7,545,333
Total potentially dilutive common stock equivalents	15,932,523	14,363,472