| Financial Instruments - Additional Information (Details Textuals) - USD ($) | Mar. 31, 2019 | Mar. 31, 2018 | 
|---|---|---|
| Fair Value Disclosures [Abstract] | ||
| Fair Value, Assets, Level 1 to Level 2 Transfers, Amount | $ 0 | $ 0 | 
| X | ||||||||||
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- Definition Amount of transfers of assets measured on a recurring basis out of Level 1 of the fair value hierarchy into Level 2. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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| X | ||||||||||
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- References No definition available. 
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