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v3.21.1

2. REVENUE RECOGNITION (Details) | 12 Months Ended
--- | ---
Mar. 31, 2021 | Mar. 31, 2020 | Mar. 31, 2019
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] |  |  |
Revenue, Practical Expedient, Initial Application and Transition, Nondisclosure of Transaction Price Allocation to Remaining Performance Obligation [true false] | true |  |
Revenue, Practical Expedient, Incremental Cost of Obtaining Contract [true/false] | true |  |
Warranty period | 3 years |  |
SRAM products | Customer Concentration Risk |  |  |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] |  |  |
Concentration risk percentage | 98.00% | 98.00% | 99.00%
Sales revenue goods | Customer Concentration Risk |  |  |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] |  |  |
Concentration risk percentage | 39.00% | 38.00% | 45.00%
Minimum |  |  |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] |  |  |
Payment terms | 30 days |  |
Maximum |  |  |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] |  |  |
Payment terms | 60 days |  |

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