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Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($) | Mar. 31, 2020 | Mar. 31, 2019
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Income Tax Disclosure [Abstract] |  |
NOL Federal Carryforward | $ 312,430 | $ 236,476
State NOL Carryforward | 157,967 | 272,758
AMT credit carryforward |  | 19,289
General business credit | 14,196 |
Inventory differences | 303,529 | 176,967
Stock option compensation expense | 128,220 | 109,464
Stock warrants |  | 23,018
Allowance for doubtful accounts | 143,748 | 11,599
Insurance contingency | 220,425 |
Reserve for estimated returns | 112,537 | 67,439
Accrued vacation | 42,928 | 7,945
Business interest deduction | 55,978 |
Total deferred tax assets, gross | 1,491,958 | 924,955
Less: valuation allowance | (87,842) |
Total deferred tax assets, net | 1,404,116 | 924,955
Depreciable and amortizable assets | (82,512) | (108,707)
Prepaid expenses | (35,883) | (57,882)
Net deferred tax liability | (118,395) | (166,589)
Net deferred tax asset | $ 1,285,721 | $ 758,366

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