Restructuring (Narrative) (Details) - USD ($)	3 Months Ended	12 Months Ended
	Mar. 31, 2017	Dec. 31, 2017
Restructuring expense	$ 387,638
Restructuring payments	95,000
Restructuring accruals	$ 293,000
Scenario, Forecast [Member]
Restructuring expense		$ 1,900,000