Summary of Significant Accounting Policies, Revenue Recognition (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Revenue Recognition [Abstract]
Period of research and development projects	3 years
Estimated allowances on product sales	$ (591)	$ 0
Accounts Receivable [Member]
Revenue Recognition [Abstract]
Estimated allowances on product sales	(104)	0
Accrued Expenses [Member]
Revenue Recognition [Abstract]
Estimated allowances on product sales	$ (487)	$ 0