Quarterly report pursuant to Section 13 or 15(d)

Note 9 - Notes Payable (Details Textual)

Note 9 - Notes Payable (Details Textual) - USD ($)					1 Months Ended				3 Months Ended		9 Months Ended
Note 9 - Notes Payable (Details Textual) - USD ($)	Apr. 09, 2018	Mar. 26, 2018	Mar. 31, 2017	Mar. 03, 2017	Dec. 31, 2017	Nov. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	May 31, 2015	Jul. 31, 2012
Notes Payable, Current, Total					$ 2,353,639				$ 2,164,330		$ 2,164,330
Interest Expense, Debt, Total									45,000	$ 26,000	134,000	$ 91,000
Interest Expense Recorded Related to Amortization of Debt Discounts and Deferred Financing Costs									44,000	29,000	129,000	68,000
CRG [Member]
Draws on Letter of Credit	$ 7,100,000
Judicial Ruling [Member] \| CRG Loan Agreement, Texas Case [Member]
Loss Contingency, Damages Awarded, Value, Additional Amount				$ 7,000,000	7,000,000
Loss Contingency, Damages Awarded, Value, Amount not Taken into Consideration					4,100,000
Judicial Ruling [Member] \| CRG Loan Agreement, Texas Case [Member] \| Maximum [Member]
Loss Contingency, Damages Awarded, Value				66,000,000	66,000,000
Platinum Loan Agreement [Member]
Interest Expense, Debt, Excluding Amortization											129,000	211,000
Reclassification of Interest Expense, Debt, Excluding Amortization, to Discontinued Operations												143,000
Convertible Debt, Fair Value Disclosures					2,000,000				2,200,000		2,200,000
Embedded Derivative, Fair Value of Embedded Derivative Liability					0				0		0
Term Loan Agreement [Member] \| Judicial Ruling [Member] \| CRG Loan Agreement, Texas Case [Member]
Repayments of Debt			$ 59,000,000
Notes Payable Issued for Prepayment of Insurance Premiums [Member]
Notes Payable, Current, Total					$ 318,000				0		0
Notes Payable Issued for Prepayment of Insurance Premiums [Member] \| IPFS [Member]
Debt Instrument, Face Amount						$ 396,000		$ 348,000
Debt Instrument, Interest Rate, Stated Percentage						4.00%		8.99%
Debt Instrument, Term						300 days		240 days
Debt Instrument, Periodic Payment, Total						$ 40,000		$ 45,000
PPCO [Member] \| Platinum Loan Agreement [Member]
Line of Credit Facility, Maximum Borrowing Capacity														$ 50,000,000
Repayments of Debt		$ 7,700,000
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Period Increase (Decrease), Total									$ 0	$ 0	$ 0	$ (153,000)
CRG [Member] \| Term Loan Agreement [Member] \| Judicial Ruling [Member] \| CRG Loan Agreement, Texas Case [Member]
Repayments of Debt				$ 59,000,000			$ 59,000,000
CRG [Member] \| Term Loan Agreement [Member] \| Term Loan [Member]
Long-term Debt, Total													$ 50,000,000