Deferred Revenue (Details) - USD ($) $ in Thousands |
12 Months Ended | |
|---|---|---|
Mar. 31, 2018 |
Mar. 31, 2017 |
|
| Changes in deferred revenue | ||
| Deferred revenue balance, end of the period | $ 6,596 | $ 5,050 |
| FPP agreements | ||
| Changes in deferred revenue | ||
| FPP Balance, beginning of the period | 3,414 | 2,929 |
| FPP Billings | 15,138 | 13,447 |
| FPP Revenue recognized | (15,003) | (12,962) |
| Balance attributed to FPP contracts | 3,549 | 3,414 |
| Distributor Support System | 1,087 | |
| Deposits | 1,960 | 1,636 |
| Deferred revenue balance, end of the period | $ 6,596 | $ 5,050 |