Note 1 - Summary of Significant Accounting Policies (Details Textual)	1 Months Ended			3 Months Ended		6 Months Ended
	Aug. 13, 2019 USD ($)	Jun. 30, 2019 USD ($) $ / shares shares	Sep. 30, 2018 USD ($)	Jun. 30, 2019 USD ($) $ / shares shares	Jun. 30, 2018 USD ($)	Jun. 30, 2019 USD ($) $ / shares shares	Jun. 30, 2018 USD ($)	Apr. 04, 2019 $ / shares	Jan. 01, 2019 USD ($)	Dec. 31, 2018 USD ($) $ / shares shares
Common Stock, Shares, Outstanding, Ending Balance | shares		30,974,761		30,974,761		30,974,761				14,091,748
Common Stock, Par or Stated Value Per Share | $ / shares		$ 0.01		$ 0.01		$ 0.01		$ 0.01		$ 0.01
Retained Earnings (Accumulated Deficit), Ending Balance		$ (64,936,025)		$ (64,936,025)		$ (64,936,025)				$ (63,107,945)
Cash and Cash Equivalents, at Carrying Value, Ending Balance		69,557		69,557		69,557				162,152
Operating Lease, Right-of-Use Asset		1,005,525		1,005,525		1,005,525
Operating Lease, Liability, Current		501,427		501,427		501,427
Depreciation, Total				131,420	$ 18,825	153,302	$ 33,321
Amortization of Intangible Assets, Total				88,416	$ 4,070	106,060	$ 7,741
Income Tax Expense (Benefit), Total						0
Unrecognized Tax Benefits, Ending Balance		0		0		0
Liability for Uncertainty in Income Taxes, Current		0		0		$ 0
Open Tax Year						2015 2016 2017 2018
Number of Operating Segments						5
Operating Lease, Liability, Total		1,005,525		1,005,525		$ 1,005,525
Accounting Standards Update 2016-02 [Member]
Operating Lease, Right-of-Use Asset									$ 353,007
Operating Lease, Liability, Current									79,252
Operating Lease, Liability, Total									$ 353,007
Convertible Promissory Note [Member]
Proceeds from Debt, Net of Issuance Costs			$ 275,000
S-3 Public Offering [Member]
Proceeds from Issuance or Sale of Equity, Total						2,100,000
Issuance or Sale of Equity, Potentially Issuable		4,300,000		4,300,000		4,300,000
Private Placement [Member]
Proceeds from Issuance or Sale of Equity, Total		776,000
Issuance or Sale of Equity, Potentially Issuable		$ 3,500,000		$ 3,500,000		$ 3,500,000
Private Placement [Member] | Subsequent Event [Member]
Proceeds from Issuance or Sale of Equity, Total	$ 1,238,800