Revenue Recognition (Details Narrative) - Bellco [Member] $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018 USD ($) Products $ / shares	Sep. 30, 2017 USD ($)	Sep. 30, 2018 USD ($) Products $ / shares	Sep. 30, 2017 USD ($)	Dec. 31, 2017 USD ($)
Number of units under first tier royalty receivable | Products	125,000		125,000
First tier royalty per unit	$ 2.10		$ 2.10
Second tier royalty per unit	$ 1.50		$ 1.50
License Agreement [Member]
Deferred revenue recognized | $	$ 18		$ 53
Royalty income | $	$ 21	$ 57	$ 79	$ 115
Deferred revenue | $					$ 278
EUR [Member]
First tier royalty per unit	$ 1.75		$ 1.75
Second tier royalty per unit	$ 1.25		$ 1.25