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Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($) | Mar. 31, 2019 | Mar. 31, 2018
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Income Tax Disclosure [Abstract] |  |
Federal net operating loss carryforward | $ 236,476 | $ 263,231
State net operating loss carryforward | 272,758 | 289,584
AMT credit carryforward | 19,289 | 92,723
Inventory differences | 176,967 | 190,327
Allowance for doubtful accounts | 11,599 | 18,462
Reserve for sales returns | 67,439 | 55,505
Stock option compensation expense | 109,464 | 104,676
Stock warrants | 23,018 | 22,802
Accrued expenses | 7,944 | 7,215
Total deferred tax assets | 924,954 | 1,044,525
Depreciation | (108,706) | (76,364)
Prepaid expenses | (57,882) | (31,024)
Net deferred tax assets | $ 758,366 | $ 937,137

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