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Income Taxes - Summary of Net Deferred Tax Assets (Detail) - USD ($) $ in Thousands | Mar. 31, 2017 | Mar. 31, 2016
--- | --- | ---
Deferred tax assets: |  |
Net operating loss carry forwards | $ 0 | $ 0
Research and development credits | 0 | 0
Depreciation and amortization | (71) | (105)
Accrued expenses and reserves | 1,373 | 862
Stock compensation | 6,720 | 5,584
Other, net | 7 | 12
Total deferred tax assets | 8,029 | 6,353
Valuation allowance | (8,029) | (6,353)
Deferred tax assets net | $ 0 | $ 0

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