Balance Sheet Detail (Tables)

9 Months Ended

12 Months Ended

Sep. 30, 2017

Dec. 31, 2016

Balance Sheet Detail

Schedule of inventory

	September 30,		December 31,
	2017		2016
	(in thousands)
Inventories:
Work-in-process	$	1,071	$	1,270
Finished goods		175		181
	$	1,246	$	1,451

Schedule of identifiable intangible assets

Identifiable intangible assets were (dollar amounts in thousands):

	September 30, 2017
		Gross				Net
	Life	Carrying		Accumulated		Carrying
	(years)	Amount		Amortization		Amount
Patent license	7		$ 780		$ 641		$ 139

	December 31, 2016
		Gross				Net
	Life	Carrying		Accumulated		Carrying
	(years)	Amount		Amortization		Amount
Patent license	7		$ 780		$ 557		$ 223

Identifiable intangible assets were (dollar amounts in thousands):

	December 31, 2016
		Gross				Net
	Life	Carrying		Accumulated		Carrying
	(years)	Amount		Amortization		Amount
Patent license	7		$ 780		$ 557		$ 223

	December 31, 2015
		Gross				Net
	Life	Carrying		Accumulated		Carrying
	(years)	Amount		Amortization		Amount
Patent license	7		$ 780		$ 446		$ 334