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1. THE COMPANY AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - PP&E (Details) | 12 Months Ended
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Mar. 31, 2017 USD ($) segment | Mar. 31, 2016 USD ($) | Mar. 31, 2015 USD ($)
Property and equipment, net: |  |  |
Impairment losses on long-lived equipment | $ 0 | $ 0 | $ 0
Segments |  |  |
Number of Reportable Segments | segment | 1 |  |
Operating segments | segment | 1 |  |
Accounting for stock-based compensation |  |  |
Expected life | 5 years |  |
Dividend yield (as a percent) | 0.00% |  |
Net deferred tax assets | $ 8,946,000 | 6,445,000 |
Comprehensive income (loss) | $ (204,000) | (2,169,000) | (4,985,000)
Inventories |  |  |
Minimum months to determine excess inventory | 12 months |  |
Inventory Write-down | $ 588,000 | $ 1,172,000 | $ 1,067,000
Minimum |  |  |
Property and equipment, net: |  |  |
Useful life, intangible assets | 5 years |  |
Maximum |  |  |
Property and equipment, net: |  |  |
Useful life, intangible assets | 15 years |  |
Software | Minimum |  |  |
Property and equipment, net: |  |  |
Useful life, property and equipment | 3 years |  |
Software | Maximum |  |  |
Property and equipment, net: |  |  |
Useful life, property and equipment | 5 years |  |
Computer and other equipment | Minimum |  |  |
Property and equipment, net: |  |  |
Useful life, property and equipment | 5 years |  |
Computer and other equipment | Maximum |  |  |
Property and equipment, net: |  |  |
Useful life, property and equipment | 10 years |  |
Building and building improvements | Minimum |  |  |
Property and equipment, net: |  |  |
Useful life, property and equipment | 10 years |  |
Building and building improvements | Maximum |  |  |
Property and equipment, net: |  |  |
Useful life, property and equipment | 25 years |  |
Furniture and fixtures |  |  |
Property and equipment, net: |  |  |
Useful life, property and equipment | 7 years |  |

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