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5. FINANCIAL INSTRUMENTS - Available for sale investments (Details) - USD ($) | 9 Months Ended |
--- | --- | ---
Dec. 31, 2015 | Mar. 31, 2015
Available-for-sale investments |  |
Cost | $ 34,917,000 |
Fair Value | $ 34,870,000 |
Other information |  |
Maximum maturity period of investment portfolio | 3 years |
Deferred tax asset related to unrecognized gains and losses on short-term and long-term investments | $ 17,000 |
Deferred tax liability related to unrecognized gains and losses on short-term and long-term investments |  | $ 11,000
Short-term investments |  |
Available-for-sale investments |  |
Cost | 19,391,000 | 22,182,000
Gross Unrealized Gains | 5,000 | 19,000
Gross Unrealized Losses | (15,000) |
Fair Value | 19,381,000 | 22,201,000
Short-term investments | State and municipal obligations |  |
Available-for-sale investments |  |
Cost | 1,021,000 | 6,810,000
Gross Unrealized Gains | 2,000 |
Fair Value | 1,023,000 | 6,810,000
Short-term investments | Corporate notes |  |
Available-for-sale investments |  |
Cost | 3,425,000 | 7,366,000
Gross Unrealized Gains |  | 10,000
Gross Unrealized Losses | (6,000) |
Fair Value | 3,419,000 | 7,376,000
Short-term investments | Certificates of deposits |  |
Available-for-sale investments |  |
Cost | 9,250,000 | 7,000,000
Gross Unrealized Gains | 3,000 | 9,000
Gross Unrealized Losses | (5,000) |
Fair Value | 9,248,000 | 7,009,000
Short-term investments | International government obligations |  |
Available-for-sale investments |  |
Cost | 2,692,000 |
Gross Unrealized Losses | (2,000) |
Fair Value | 2,690,000 |
Short-term investments | Agency bonds |  |
Available-for-sale investments |  |
Cost | 3,003,000 | 1,006,000
Gross Unrealized Losses | (2,000) |
Fair Value | 3,001,000 | 1,006,000
Long-term investment |  |
Available-for-sale investments |  |
Cost | 15,526,000 | 21,722,000
Gross Unrealized Gains | 2,000 | 32,000
Gross Unrealized Losses | (39,000) | (14,000)
Fair Value | 15,489,000 | 21,740,000
Long-term investment | State and municipal obligations |  |
Available-for-sale investments |  |
Cost |  | 1,053,000
Gross Unrealized Gains |  | 4,000
Fair Value |  | 1,057,000
Long-term investment | Corporate notes |  |
Available-for-sale investments |  |
Cost | 2,276,000 | 4,232,000
Gross Unrealized Losses | (10,000) | (10,000)
Fair Value | 2,266,000 | 4,222,000
Long-term investment | Certificates of deposits |  |
Available-for-sale investments |  |
Cost | 12,250,000 | 9,750,000
Gross Unrealized Gains | 2,000 | 24,000
Gross Unrealized Losses | (29,000) | (1,000)
Fair Value | 12,223,000 | 9,773,000
Long-term investment | International government obligations |  |
Available-for-sale investments |  |
Cost |  | 2,684,000
Gross Unrealized Losses |  | (1,000)
Fair Value |  | 2,683,000
Long-term investment | Agency bonds |  |
Available-for-sale investments |  |
Cost | 1,000,000 | 4,003,000
Gross Unrealized Gains |  | 4,000
Gross Unrealized Losses |  | (2,000)
Fair Value | $ 1,000,000 | $ 4,005,000

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