Discontinued Operations (Narrative) (Details) - USD ($)		1 Months Ended	3 Months Ended
	Dec. 22, 2015	Dec. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Oct. 22, 2014	Sep. 17, 2014
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Payments to terminate lease agreement				$ 200,000
Gain on lease termination			$ 0	310,000
Discontinued Operations, Disposed of by Sale [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from sale of venture	$ 700,000
Book value of outstanding receivables	$ 0
Incentive tax credits				0
Payments to terminate lease agreement		$ 200,000
Gain on lease termination				300,000
Discontinued Operations, Disposed of by Sale [Member] | Digital Products Business [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Asset purchase agreement, selling price					$ 17,500,000
Discontinued Operations, Disposed of by Sale [Member] | Photovoltaics [Member] | Photovoltaics Business [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Asset purchase agreement, selling price						$ 149,900,000
New Mexico [Member] | Discontinued Operations, Disposed of by Sale [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Incentive tax credits			$ 0	$ 100,000