Note 17 - Segment and Related Information - Revenue By Geographic Location (Details) - USD ($)	3 Months Ended									12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Dec. 31, 2018	Sep. 30, 2017
Revenues	$ 21,135,277	$ 19,771,137	$ 13,593,192	$ 11,878,700	$ 11,754,219	$ 10,892,868	$ 7,220,626	$ 3,346,315	$ 2,356,926	$ 66,378,306	$ 23,816,735
UNITED STATES
Revenues					10,279,947					64,874,554	22,735,948
AUSTRALIA
Revenues					997						4,112
CANADA
Revenues					86,386					351,211	419,625
England [Member]
Revenues					1,324,042
MEXICO
Revenues					4,649					53,246	315,869
POLAND
Revenues					52,492					10,299	316,666
Other Foreign Countries [Member]
Revenues					$ 5,706					$ 1,088,996	$ 24,515