Condensed Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - USD ($)	Jun. 30, 2022	Dec. 31, 2021
Accumulated depreciation	$ 112,000	$ 94,000
Allowance of doubtful accounts	$ 0	$ 100,000
Common stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Common stock, shares authorized (in shares)	98,999,000	98,999,000
Common stock, shares issued (in shares)	7,762,375	7,762,375
Common stock, shares outstanding (in shares)	7,762,375	7,762,375
Warrant issued (in shares)	1,702,128	1,702,128
Warrant outstanding (in shares)	1,702,128	1,702,128
Series A Preferred Stock [Member]
Preferred stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Preferred stock, shares authorized (in shares)	50,000	50,000
Preferred stock, shares issued (in shares)	2,862	2,862
Preferred stock, shares outstanding (in shares)	2,862	2,862
Preferred stock, liquidation preference	$ 2,862,000	$ 2,862,000
Series1 Preferred Stock [Member]
Preferred stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Preferred stock, shares authorized (in shares)	97,000	97,000
Preferred stock, shares issued (in shares)	39,811	39,811
Preferred stock, shares outstanding (in shares)	39,811	39,811
Preferred stock, liquidation preference	$ 39,811,000	$ 39,811,000
Nonvoting Preferred Stock [Member]
Preferred stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Preferred stock, shares authorized (in shares)	1,000	1,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0