Discontinued Operations (Details) - USD ($) $ in Thousands	Oct. 23, 2015	Oct. 23, 2017	Oct. 23, 2016	Dec. 31, 2015	Sep. 30, 2015
San Francisco
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Future minimum lease payments				$ 200
Etherios, Inc.
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Consideration of disposal	$ 9,000
Etherios, Inc. | Discontinued Operations, Disposed of by Sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash received at closing	4,000
Employee related liabilities	$ 1,134
Etherios, Inc. | Discontinued Operations, Disposed of by Sale | United States Federal Tax Jurisdiction
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Deferred income tax liability					$ 589
Etherios, Inc. | Discontinued Operations, Disposed of by Sale | Forecast
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Deferred receivable from sale agreement		$ 2,000	$ 3,000