| Segment and Geographic Information | 
    |   | 
  | 
    Three Months Ended September 30, | 
  | 
  | 
      | 
  | 
  | 
      | 
  | 
 
    |   | 
  | 
    2017 | 
  | 
  | 
    2016 | 
  | 
  | 
    $
    Change | 
  | 
  | 
    %
    Change | 
  | 
 
    | United States | 
  | 
    $ | 
2,268,000 | 
  | 
  | 
    $ | 
1,697,000 | 
  | 
  | 
    $ | 
571,000 | 
  | 
  | 
      | 
34% | 
  | 
 
    | Latin America | 
  | 
      | 
754,000 | 
  | 
  | 
      | 
– | 
  | 
  | 
      | 
754,000 | 
  | 
  | 
      | 
100% | 
  | 
 
    | Europe and Rest of the World | 
  | 
      | 
1,122,000 | 
  | 
  | 
      | 
877,000 | 
  | 
  | 
      | 
245,000 | 
  | 
  | 
      | 
28% | 
  | 
 
    | Total | 
  | 
    $ | 
4,144,000 | 
  | 
  | 
    $ | 
2,574,000 | 
  | 
  | 
    $ | 
1,570,000 | 
  | 
  | 
      | 
61% | 
  | 
 
 
  
    |   | 
  | 
    Six Months Ended September 30, | 
  | 
  | 
      | 
  | 
  | 
      | 
  | 
 
    |   | 
  | 
    2017 | 
  | 
  | 
    2016 | 
  | 
  | 
    $
    Change | 
  | 
  | 
    %
    Change | 
  | 
 
    | United States | 
  | 
    $ | 
4,127,000 | 
  | 
  | 
    $ | 
3,070,000 | 
  | 
  | 
    $ | 
1,057,000 | 
  | 
  | 
      | 
34% | 
  | 
 
    | Latin America | 
  | 
      | 
1,323,000 | 
  | 
  | 
      | 
– | 
  | 
  | 
      | 
1,323,000 | 
  | 
  | 
      | 
100% | 
  | 
 
    | Europe and Rest of the World | 
  | 
      | 
2,297,000 | 
  | 
  | 
      | 
1,915,000 | 
  | 
  | 
      | 
382,000 | 
  | 
  | 
      | 
20% | 
  | 
 
    | Total | 
  | 
    $ | 
7,747,000 | 
  | 
  | 
    $ | 
4,985,000 | 
  | 
  | 
    $ | 
2,762,000 | 
  | 
  | 
      | 
55% | 
  | 
 
 
  
 | 
| Product revenues reclassified from continued to discontinued operations | 
    |   | 
  | 
    Three Months Ended September 30, | 
  | 
 
    |   | 
  | 
    2017 | 
  | 
  | 
    2016 | 
  | 
 
    | Product revenues | 
  | 
    $ | 
– | 
  | 
  | 
    $ | 
1,235,000 | 
  | 
 
    | Product license fees and royalties | 
  | 
      | 
– | 
  | 
  | 
      | 
76,000 | 
  | 
 
    | Total product related revenues | 
  | 
    $ | 
– | 
  | 
  | 
    $ | 
1,311,000 | 
  | 
 
 
  
    |   | 
  | 
    Six Months Ended September 30, | 
  | 
 
    |   | 
  | 
    2017 | 
  | 
  | 
    2016 | 
  | 
 
    | Product revenues | 
  | 
    $ | 
– | 
  | 
  | 
    $ | 
2,333,000 | 
  | 
 
    | Product license fees and royalties | 
  | 
      | 
– | 
  | 
  | 
      | 
151,000 | 
  | 
 
    | Total product related revenues | 
  | 
    $ | 
– | 
  | 
  | 
    $ | 
2,484,000 | 
  | 
 
 
   
 |