Intangible Assets (Tables)

9 Months Ended

Sep. 30, 2017

Intangible Assets [Abstract]

Schedule of intangible assets

Intangible assets consisted of the following (dollars in thousands):            

	September 30, 2017
								Weighted
	Gross					Net		Average
	Carrying		Accumulated			Carrying		Useful Life
	Amount		Amortization			Value		(in Years)
Developed technology	$	3,900	$	(3,900	)	$	—	—
Vision development costs		2,885		(360	)		2,525	8.0
Software development costs		871		—			871	—
Total	$	7,656	$	(4,260	)	$	3,396	8.0

	December 31, 2016
								Weighted
	Gross					Net		Average
	Carrying		Accumulated			Carrying		Useful Life
	Amount		Amortization			Value		(in Years)
Developed technology	$	3,900	$	(3,900	)	$	—	—
Vision development costs		2,885		(90	)		2,795	8.0
	$	6,785	$	(3,990	)	$	2,795	8.0