Inventory (Narrative) (Details) - USD ($)	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Inventory [Line Items]
Inventory reserves	$ 464,693		$ 539,027
Inventory, cost capitalized during period	791,000	$ 0
Production Materials
Inventory [Line Items]
Inventory reserves related to production issues and research and development	120,000
In Process Research and Development
Inventory [Line Items]
Inventory reserves related to production issues and research and development	$ 123,000	$ 45,000