Consolidated Balance Sheets (Parentheticals) - $ / shares	Dec. 31, 2019	Dec. 31, 2018
Preferred Stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Preferred Stock, authorized (in shares)	1,000,000	1,000,000
Preferred Stock, issued (in shares)	0	0
Preferred Stock, outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Common stock, shares authorized (in shares)	100,000,000	30,000,000
Common stock, shares issued (in shares)	53,050,211	22,167,486
Common stock, shares outstanding (in shares)	52,145,096	22,167,486
Treasury stock, shares (in shares)	905,115	0