|
Note 3 - Intangible Assets and Goodwill (Details) (USD $)
|
9 Months Ended | ||
|---|---|---|---|
|
Jan. 31, 2014
|
Jan. 31, 2013
|
Apr. 30, 2013
|
|
| Goodwill and Intangible Assets Disclosure [Abstract] | |||
| Amortization of Intangible Assets | $ 154,000 | $ 154,000 | |
| Goodwill | 1,942,000 | 1,942,000 | 1,942,000 |
| Goodwill, Other Changes | $ 0 | ||