Summary of Significant Accounting Policies (Details 2) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Summary of Significant Accounting Policies [Line Items]
Total cost	$ 11,848	$ 24,346
Accumulated depreciation and amortization	(10,573)	(17,326)
Property and equipment, net	1,275	7,110
Machinery, equipment and tooling [Member]
Summary of Significant Accounting Policies [Line Items]
Total cost	6,128	17,769
Leasehold improvements [Member]
Summary of Significant Accounting Policies [Line Items]
Total cost	4,624	4,624
Furniture and fixtures [Member]
Summary of Significant Accounting Policies [Line Items]
Total cost	8	991
Information systems [Member]
Summary of Significant Accounting Policies [Line Items]
Total cost	841	699
Construction in progress [Member]
Summary of Significant Accounting Policies [Line Items]
Total cost	$ 247	$ 263