Quarterly report pursuant to Section 13 or 15(d)

Note 12 - Equity (Details Textual)

Note 12 - Equity (Details Textual) - USD ($)					1 Months Ended				3 Months Ended				6 Months Ended		10 Months Ended	12 Months Ended
Note 12 - Equity (Details Textual) - USD ($)	Aug. 12, 2021	Jul. 08, 2021	Mar. 02, 2021	Aug. 31, 2020	Aug. 12, 2021	Feb. 29, 2020	Jan. 31, 2020	Dec. 31, 2019	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Dec. 31, 2020	Dec. 31, 2019	Aug. 30, 2020
Stock Issued During Period, Shares, New Issues (in shares)								2,100,000
Proceeds from Issuance of Common Stock							$ 812,000	$ 1,900,000					$ 2,133	$ 3,025,040			$ 1,100,000
Common Stock, Share Subscribed but Unissued, Subscriptions Receivable									$ (0)				(0)		$ (0)	$ 4,975,000
Proceeds from Issuance of Preferred Stock and Preference Stock													$ 10,475,000	$ 700,000
Stock Issued During Period, Value, New Issues									$ 1,800,000		$ 700,000
Stock Issued During Period, Shares, Employee Benefit Plan (in shares)													30,018	32,651
Stock Issued During Period, Value, Employee Benefit Plan										$ 76,846	$ 39,834		$ 77,000	$ 40,000
Issuance of Stock to Defined Contribution Plan for Employer Matching Contribution													$ 76,846	$ 39,834
Common Stock [Member]
Stock Issued During Period, Shares, New Issues (in shares)									0
Stock Issued During Period, Value, New Issues									$ 0
Stock Issued During Period, Shares, Employee Benefit Plan (in shares)										30,018	32,651
Stock Issued During Period, Value, Employee Benefit Plan										$ 30	$ 33
Stock Issued During Period, Shares, Issued for Employee Bonuses (in shares)											40,844	53,315
Conversion from Series D Preferred Stock To Common Stock [Member]
Stock Issued During Period, Shares, New Issues (in shares)													72,500
Stock Subscriptions Receivable									7,250,000				$ 7,250,000		$ 7,250,000
Series D Preferred Stock [Member]
Stock Issued During Period, Value, New Issues										250,001
Series E Preferred Stock [Member]
Stock Issued During Period, Value, New Issues										$ 4,980,709
Preferred Stock, Convertible, Conversion Price (in dollars per share)			$ 2.30
Preferred Stock, Redemption Price Per Share (in dollars per share)			$ 110
Subsequent Event [Member] \| Conversion from Series D Preferred Stock To Common Stock [Member]
Conversion of Stock, Shares Converted (in shares)					72,500
Conversion of Stock, Shares Issued (in shares)					3,778,789
Subsequent Event [Member] \| Series E Preferred Stock [Member]
Conversion of Stock, Shares Converted (in shares)	0
Keystone Capital Partners, LLC [Member] \| Series D Preferred Stock [Member]
Stock Issued During Period, Shares, New Issues (in shares)				150,000											72,500
Stock Issued During Period, Value, Other				$ 15,000,000.0
Proceeds from Issuance of Preferred Stock and Preference Stock													2,925,000			2,925,000
Stock Issued During Period, Value, New Issues				$ 15,000,000.0
Keystone Capital Partners, LLC [Member] \| Series D Preferred Stock [Member] \| Maximum [Member]
Convertible Preferred Stock, Shares Issued upon Conversion (in shares)				5,147,000
Keystone Capital Partners, LLC [Member] \| Subsequent Event [Member] \| Series D Preferred Stock [Member]
Stock Issued During Period, Shares, New Issues (in shares)		22,077
Proceeds from Issuance of Preferred Stock and Preference Stock		$ 2,200,000
Stock Issued During Period, Value, New Issues		$ 2,200,000
John K. Scott, Jr. [Member] \| Series E Preferred Stock [Member]
Stock Issued During Period, Shares, New Issues (in shares)			50,000
Stock Issued During Period, Value, New Issues			$ 5,000,000.0
Percentage of Securities Allowed to be Purchased in Third-Party Offering, Maximum			33.33%
Private Placement [Member]
Stock Issued During Period, Value, New Issues											$ 520,030
Private Placement [Member] \| Common Stock [Member]
Stock Issued During Period, Shares, New Issues (in shares)											1,911,800	902,162
Stock Issued During Period, Value, New Issues											$ 1,912	$ 902
Private Placement [Member] \| Mastiff Group LLC [Member]
Sale of Stock, Commitment Amount									$ 4,975,000				$ 4,975,000		$ 4,975,000	$ 4,975,000		$ 25,000,000.0
Private Placement [Member] \| Mastiff Group LLC [Member] \| Subsequent Event [Member]
Proceeds from Issuance of Common Stock	$ 25,000				$ 25,000
Investor [Member]
Stock Issued During Period, Shares, New Issues (in shares)						4,000,000.0										4,020,588
Proceeds from Issuance of Common Stock						$ 3,400,000										$ 3,400,000
Employees [Member] \| Common Stock [Member]
Stock Issued During Period, Shares, Issued for Employee Bonuses (in shares)														94,159
Issuance of Stock to Defined Contribution Plan for Employer Matching Contribution														$ 172,000
Prepaid Expenses and Other Current Assets [Member]
Common Stock, Share Subscribed but Unissued, Subscriptions Receivable								$ 812,000									$ 812,000