Note 23 - Geographical Information - Long-lived Assets By Geographic Region (Details) - USD ($)	Mar. 31, 2019	Mar. 31, 2018
Non-current Assets	$ 29,982,409	$ 20,273,171
UNITED STATES
Non-current Assets	4,946,997	5,209,831
AUSTRALIA
Non-current Assets	5,186
Non-US [Member]
Non-current Assets	25,035,412	15,063,340
MEXICO
Non-current Assets	2,680,825	4,352,257
NETHERLANDS
Non-current Assets	5,541,072	7,084,947
CHINA
Non-current Assets	16,808,329
ROMANIA
Non-current Assets		$ 3,626,136