Note 8 - Revenue By Geographic Region (Details) - USD ($) |
12 Months Ended | ||
|---|---|---|---|
Mar. 31, 2016 |
Mar. 31, 2015 |
Mar. 31, 2014 |
|
| UNITED STATES | |||
| Revenue | $ 12,392,053 | $ 11,919,548 | $ 11,159,443 |
| Europe [Member] | |||
| Revenue | 11,392,046 | 13,779,392 | 11,065,547 |
| Asia [Member] | |||
| Revenue | 3,113,484 | 4,318,209 | 3,374,202 |
| Other Areas [Member] | |||
| Revenue | 819,695 | 566,939 | 335,715 |
| Revenue | $ 27,717,278 | $ 30,584,088 | $ 25,934,907 |