Consolidated Balance Sheets (Parentheticals) - USD ($)	Dec. 31, 2019	Dec. 31, 2018
Notes receivable		$ 497,276
Reserve for bad debt	1,037,524	0
Discount of note payable	$ 350,426	$ 1,032,814
Preferred stock, shares authorized (in shares)	20,000,000	20,000,000
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	100,000,000	50,000,000
Common stock, shares outstanding (in shares)	4,056,652	1,409,175
Series B Convertible Preferred Stock [Member]
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	2,300,000	2,300,000
Preferred stock, shares outstanding (in shares)	79,246	79,246
Series D Convertible Preferred Stock [Member]
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	3,500,000	3,500,000
Preferred stock, shares outstanding (in shares)	3,500,000	0
Series E Convertible Preferred Stock [Member]
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	350	350
Preferred stock, shares outstanding (in shares)	257.258	0
Helomics Holding [Member]
Notes receivable	$ 0	$ 452,775