Revenue (Tables)

12 Months Ended

Dec. 31, 2018

Revenue

Schedule of recognized revenue under funding, license and collaboration agreements

	Year ended December 31,
	2018		2017
Symbio
Upfront license fee recognition over time	$	398,000	$	455,000
Supplies		61,000		332,000
Hanx
Upfront license payment recognized at a point in time		450,000		—
Pint
Upfront license payment recognized at a point it time		319,000		—
	$	1,228,000	$	787,000

Schedule of deferred revenue

	Symbio
	Upfront Payment
Deferred balance at December 31, 2017	$	4,546,000
Recognition to revenue		398,000
Deferred balance at December 31, 2018	$	4,148,000