Condensed Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - USD ($)	Mar. 31, 2019	Dec. 31, 2018
Notes receivable	$ 1,801,479	$ 497,276
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	100,000,000	100,000,000
Common stock, shares outstanding (in shares)	17,360,144	14,091,748
Series B Convertible Preferred Stock [Member]
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	20,000,000	20,000,000
Preferred stock, shares outstanding (in shares)	79,246	79,246
Bridge Loan [Member]
Discount of note payable	$ 646,524	$ 969,786
Notes Payable [Member]
Discount of note payable	352,961	63,028
Helomics Holding [Member]
Notes receivable	$ 738,138	$ 452,775