Note 2 - Summary of Significant Accounting Policies (Tables)

3 Months Ended

Mar. 31, 2020

Notes Tables

Disaggregation of Revenue [Table Text Block]

	Three Months Ended March 31, 2020
	Device Revenue		Service Revenue		Other Revenue		Total Revenue
AXP	$	2,208,000	$	24,000	$	--	$	2,232,000
BioArchive		164,000		332,000		--		496,000
CAR-TXpress		152,000		12,000		71,000		235,000
Manual Disposables		203,000		--		--		203,000
Other		14,000		--		20,000		34,000
Total	$	2,741,000	$	368,000	$	91,000	$	3,200,000

	Three Months Ended March 31, 2019
	Device Revenue		Service Revenue		Other Revenue		Total Revenue
AXP	$	1,267,000	$	55,000	$	--	$	1,322,000
BioArchive		599,000		415,000		--		1,014,000
CAR-TXpress		307,000		--		--		307,000
Manual Disposables		300,000		--		--		300,000
Other		5,000		--		14,000		19,000
Total	$	2,478,000	$	470,000	$	14,000	$	2,962,000

Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table Text Block]

	Remainder of 2020		2021		2022		2023		2024 and beyond		Total
Service revenue	$	807,000	$	751,000	$	324,000	$	184,000	$	38,000	$	2,104,000
Clinical revenue		3,000		13,000		13,000		13,000		176,000		218,000
Exclusivity Fee		214,000		286,000		286,000		286,000		762,000		1,834,000
Total	$	1,024,000	$	1,050,000	$	623,000	$	483,000	$	976,000	$	4,156,000

Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]

	2020		2019
Common stock equivalents of convertible promissory note and accrued interest		5,159,496		5,096,721
Vested Series A warrants		40,441		40,441
Unvested Series A warrants (1)		69,853		69,853
Warrants – other		1,273,461		1,557,884
Stock options		287,849		290,933
Total		6,831,100		7,055,832