Note 2 - Fair Value Measurement (Tables)

9 Months Ended

Sep. 30, 2018

Notes Tables

Fair Value, Assets Measured on Recurring Basis [Table Text Block]

As of September 30, 2018	Level 1		Level 2		Total
Bank deposits	$	32,327,287	$	—	$	32,327,287
Money market funds		53,387		—		53,387
Total cash and cash equivalents	$	32,380,674	$	—	$	32,380,674

As of December 31, 2017	Level 1		Level 2		Total
Bank deposits	$	6,610,183	$	—	$	6,610,183
Money market funds		53,135		—		53,135
Total cash and cash equivalents	$	6,663,318	$	—	$	6,663,318