Revenue Recognition (Details Narrative) - Bellco [Member] $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019 USD ($) Products $ / shares	Jun. 30, 2018 USD ($) $ / shares	Jun. 30, 2019 USD ($) Products $ / shares	Jun. 30, 2018 USD ($) $ / shares	Jan. 02, 2018 USD ($)
Number of units under first tier royalty receivable | Products	125,000		125,000
First tier royalty per unit	$ 2.15		$ 2.15
Second tier royalty per unit	$ 1.50		$ 1.50
License Agreement [Member]
Cumulative effect adjusted to accumulated deficit | $					$ 278
Royalty income | $	$ 14	$ 31	$ 40	$ 58
EURO Currency [Member]
First tier royalty per unit		$ 1.75		$ 1.75
Second tier royalty per unit		$ 1.25		$ 1.25