Note 2 - Summary of Significant Accounting Policies (Tables)

6 Months Ended

Jun. 30, 2020

Notes Tables

Disaggregation of Revenue [Table Text Block]

	Three Months Ended June 30, 2020
	Device Revenue		Service Revenue		Other Revenue		Total Revenue
AXP	$	621,000	$	48,000	$	--	$	669,000
BioArchive		165,000		294,000		--		459,000
CAR-TXpress		550,000		13,000		71,000		634,000
Manual Disposables		198,000		--		--		198,000
Other		238,000		--		44,000		282,000
Total	$	1,772,000	$	355,000	$	115,000	$	2,242,000

	Six Months Ended June 30, 2020
	Device Revenue		Service Revenue		Other Revenue		Total Revenue
AXP	$	2,829,000	$	72,000	$	--	$	2,901,000
BioArchive		329,000		626,000		--		955,000
CAR-TXpress		702,000		25,000		142,000		869,000
Manual Disposables		401,000		--		--		401,000
Other		252,000		--		64,000		316,000
Total	$	4,513,000	$	723,000	$	206,000	$	5,442,000

	Three Months Ended June 30, 2019
	Device Revenue		Service Revenue		Other Revenue		Total Revenue
AXP	$	3,028,000	$	54,000	$	--	$	3,082,000
BioArchive		433,000		351,000		--		784,000
CAR-TXpress		182,000		--		--		182,000
Manual Disposables		242,000		--		--		242,000
Other		--		7,000		8,000		15,000
Total	$	3,885,000	$	412,000	$	8,000	$	4,305,000

	Six Months Ended June 30, 2019
	Device Revenue		Service Revenue		Other Revenue		Total Revenue
AXP	$	4,295,000	$	109,000	$	--	$	4,404,000
BioArchive		1,031,000		766,000		--		1,797,000
CAR-TXpress		490,000		--		--		490,000
Manual Disposables		543,000		--		--		543,000
Other		5,000		7,000		22,000		34,000
Total	$	6,364,000	$	882,000	$	22,000	$	7,268,000

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

	Remainder of 2020		2021		2022		2023		2024 and beyond		Total
Service revenue	$	633,000	$	1,004,000	$	552,000	$	298,000	$	38,000	$	2,525,000
Clinical revenue		6,000		13,000		13,000		13,000		171,000		216,000
Exclusivity fee		143,000		286,000		286,000		286,000		761,000		1,762,000
Total	$	782,000	$	1,303,000	$	851,000	$	597,000	$	970,000	$	4,503,000

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		6,676,112		5,355,198
Vested Series A warrants		40,441		40,441
Unvested Series A warrants (1)		69,853		69,853
Warrants – other		1,006,190		1,300,091
Stock options		893,349		286,229
Total		8,685,945		7,051,812