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The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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Carrying value as of the balance sheet date of notes payable (with maturities initially due after one year or beyond the operating cycle if longer), excluding current portion.

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Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which is directly or indirectly attributable to that ownership interest in subsidiary equity which is not attributable to the parent (that is, noncontrolling interest, previously referred to as minority interest).

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The equity interest of noncontrolling shareholders, partners or other equity holders in consolidated entity.

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Ratio applied to the conversion of stock split, for example but not limited to, one share converted to two or two shares converted to one.

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Note 1 - Description of Business and Basis of Presentation (Details Textual)				3 Months Ended
	Apr. 21, 2020 USD ($)	Jun. 04, 2019	Jan. 01, 2019 USD ($)	Mar. 31, 2019 USD ($)	Jun. 30, 2020 USD ($) shares	Apr. 28, 2020 USD ($)	Dec. 31, 2019 USD ($) shares	Nov. 26, 2019 USD ($)	Jun. 30, 2019 shares	Mar. 31, 2017 USD ($)
Stockholders' Equity Attributable to Noncontrolling Interest, Ending Balance					$ 316,000		$ 530,000
Reorganization of Subsidiary and Related Change in Non-controlling Interest
Common Stock, Shares Authorized (in shares) \| shares					350,000,000		350,000,000		350,000,000
Notes Payable, Current, Total					$ 287,000
Notes Payable, Noncurrent, Total					359,000		1,000,000
Cash and Cash Equivalents, at Carrying Value, Ending Balance					6,984,000		3,157,000
Working Capital					8,059,000
Retained Earnings (Accumulated Deficit), Ending Balance					(247,971,000)		$ (236,932,000)
Paycheck Protection Program CARES Act [Member]
Proceeds from Issuance of Long-term Debt, Total	$ 646,000
Notes Payable, Current, Total	287,000
Notes Payable, Noncurrent, Total	$ 359,000
Boyalife Investment Fund II, Inc. [Member] \| Revolving Credit Facility [Member]
Line of Credit Facility, Maximum Borrowing Capacity					10,000,000					$ 10,000,000
Long-term Line of Credit, Total					$ 10,000,000	$ 10,000,000
Reverse Stock Split [Member]
Stockholders' Equity Note, Stock Split, Conversion Ratio		10
ImmuneCyte [Member]
Equity Method Investment, Ownership Percentage					18.79%			20.00%
Line of Credit Facility, Maximum Borrowing Capacity								$ 1,000,000
ImmuneCyte [Member] \| HealthBanks Biotech [Member]
Equity Method Investment, Ownership Percentage					75.16%			80.00%
Noncontrolling Interest [Member]
Reorganization of Subsidiary and Related Change in Non-controlling Interest			$ 2,843,000	$ 2,843,000
CAR-TXpress [Member]
Noncontrolling Interest, Ownership Percentage by Parent			80.00%		80.00%
Minority Interest Acquired Through Exchange			20.00%
Stockholders' Equity Attributable to Noncontrolling Interest, Ending Balance			$ 1,100,000
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners					20.00%
ThermoGenesis [Member]
Noncontrolling Interest, Ownership Percentage by Parent			100.00%
Ownership in Subsidiary Exchanged			20.00%
Stockholders' Equity Attributable to Noncontrolling Interest, Ending Balance			$ (1,711,000)