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Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($) | Mar. 31, 2018 | Mar. 31, 2017
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Income Tax Disclosure [Abstract] |  |
Federal net operating loss carryforward | $ 263,231 | $ 476,003
State net operating loss carryforward | 289,584 | 242,418
AMT credit carryforward | 92,723 | 139,754
Inventory differences | 190,327 | 436,695
Allowance for doubtful accounts | 18,462 | 46,837
Reserve for sales returns | 55,505 | 79,026
Stock option compensation expense | 104,676 | 93,178
Accrued expenses | 30,017 | 46,589
Total deferred tax assets | 1,044,525 | 1,560,500
Depreciation | (76,364) | (81,291)
Prepaid expenses | (31,024) |
Net deferred tax assets | $ 937,137 | $ 1,479,209

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