Summary of Significant Accounting Policies (Tables)

6 Months Ended

Jun. 30, 2017

Summary of Significant Accounting Policies [Abstract]

Summary of allowance for doubtful accounts

	June 30, 2017			December 31, 2016
	(in thousands)
Beginning balance	$	31		$	389
Net allowance adjustments		(21	)		(235	)
Accounts charged off, less recoveries		(4	)		(123	)
Ending balance	$	6		$	31

Schedule of inventories

	June 30, 2017		December 31, 2016
	(in thousands)
Raw materials	$	546	$	3,112
Work in progress		3,808		4,251
Finished goods		360		637
	$	4,714	$	8,000

Schedule of property and equipment

	June 30, 2017			December 31, 2016
	(in thousands)
Machinery, equipment and tooling	$	6,128		$	17,769
Leasehold improvements		4,624			4,624
Furniture and fixtures		8			991
Information systems		841			699
Construction in progress		247			263
Total cost		11,848			24,346
Accumulated depreciation and amortization		(10,573	)		(17,326	)
Property and equipment, net	$	1,275		$	7,110

Summarizes non-financial assets that were measured and recorded at fair value on non-recurring

	Carrying value at June 30, 2017		Quoted prices in active markets for identical assets (Level 1)		Significant other observable inputs (Level 2)		Significant unobservable inputs (Level 3)		Loss for six months ended June 30, 2017
	(in thousands)
Long lived assets held and used	$	1,275	$	—	$	1,275	$	—	$	675
Long lived assets held for sale		16,144		—		16,144		—		—
Total nonrecurring for value measurements	$	17,419	$	—	$	17,419	$	—	$	675

	Carrying value at December 31, 2016		Quoted prices in active markets for identical assets (Level 1)		Significant other observable inputs (Level 2)		Significant unobservable inputs (Level 3)		Loss for twelve months ended December 31, 2016
	(in thousands)
Long lived assets held and used	$	7,110	$	—	$	7,110	$	—	$	12,264
Long lived assets held for sale		14,761		—		14,761		—		14,290
Total nonrecurring for value measurements	$	21,871	$	—	$	21,871	$	—	$	26,554

Summary of comprehensive loss

	June 30, 2017			December 31, 2016
	(in thousands)
Unrealized loss on investments	$	-		$	(12	)
Unrealized loss on currency translation		(10	)		(18	)
Ending balance	$	(10	)	$	(30	)